FM / linux

/usr/src/linux-headers-5.15.0-190/include/linux/

/usr/src/linux-headers-5.15.0-190/include/linux

Name	Size	Mode	Actions
amba/	-	0755	rm
atomic/	-	0755	rm
avf/	-	0755	rm
bcma/	-	0755	rm
byteorder/	-	0755	rm
can/	-	0755	rm
ceph/	-	0755	rm
clk/	-	0755	rm
crush/	-	0755	rm
decompress/	-	0755	rm
device/	-	0755	rm
dma/	-	0755	rm
dsa/	-	0755	rm
extcon/	-	0755	rm
firmware/	-	0755	rm
fpga/	-	0755	rm
fsl/	-	0755	rm
gpio/	-	0755	rm
greybus/	-	0755	rm
hsi/	-	0755	rm
i3c/	-	0755	rm
iio/	-	0755	rm
input/	-	0755	rm
irqchip/	-	0755	rm
isdn/	-	0755	rm
lockd/	-	0755	rm
mailbox/	-	0755	rm
mdio/	-	0755	rm
mfd/	-	0755	rm
mlx4/	-	0755	rm
mlx5/	-	0755	rm
mmc/	-	0755	rm
mtd/	-	0755	rm
mux/	-	0755	rm
net/	-	0755	rm
netfilter/	-	0755	rm
netfilter_arp/	-	0755	rm
netfilter_bridge/	-	0755	rm
netfilter_ipv4/	-	0755	rm
netfilter_ipv6/	-	0755	rm
pcs/	-	0755	rm
perf/	-	0755	rm
phy/	-	0755	rm
pinctrl/	-	0755	rm
platform_data/	-	0755	rm
power/	-	0755	rm
qed/	-	0755	rm
raid/	-	0755	rm
regulator/	-	0755	rm
remoteproc/	-	0755	rm
reset/	-	0755	rm
rpmsg/	-	0755	rm
rtc/	-	0755	rm
sched/	-	0755	rm
soc/	-	0755	rm
soundwire/	-	0755	rm
spi/	-	0755	rm
ssb/	-	0755	rm
sunrpc/	-	0755	rm
surface_aggregator/	-	0755	rm
ulpi/	-	0755	rm
unaligned/	-	0755	rm
usb/	-	0755	rm
8250_pci.h	1038	0644	edit dl rm
a.out.h	354	0644	edit dl rm
acct.h	2551	0644	edit dl rm
acpi.h	40902	0644	edit dl rm
acpi_dma.h	3154	0644	edit dl rm
acpi_iort.h	2403	0644	edit dl rm
acpi_mdio.h	819	0644	edit dl rm
acpi_pmtmr.h	674	0644	edit dl rm
acpi_viot.h	478	0644	edit dl rm
adb.h	1832	0644	edit dl rm
adfs_fs.h	574	0644	edit dl rm
adreno-smmu-priv.h	2807	0644	edit dl rm
adxl.h	310	0644	edit dl rm
aer.h	1822	0644	edit dl rm
agpgart.h	3881	0644	edit dl rm
agp_backend.h	3534	0644	edit dl rm
ahci-remap.h	607	0644	edit dl rm
ahci_platform.h	1747	0644	edit dl rm
aio.h	651	0644	edit dl rm
alarmtimer.h	1990	0644	edit dl rm
alcor_pci.h	9043	0644	edit dl rm
align.h	552	0644	edit dl rm
altera_jtaguart.h	379	0644	edit dl rm
altera_uart.h	397	0644	edit dl rm
amd-iommu.h	6325	0644	edit dl rm
anon_inodes.h	670	0644	edit dl rm
apm-emulation.h	1599	0644	edit dl rm
apm_bios.h	2305	0644	edit dl rm
apple-gmux.h	918	0644	edit dl rm
apple_bl.h	498	0644	edit dl rm
arch_topology.h	2551	0644	edit dl rm
arm-cci.h	1390	0644	edit dl rm
arm-smccc.h	17382	0644	edit dl rm
armada-37xx-rwtm-mailbox.h	431	0644	edit dl rm
arm_ffa.h	7545	0644	edit dl rm
arm_sdei.h	2730	0644	edit dl rm
array_size.h	332	0644	edit dl rm
ascii85.h	555	0644	edit dl rm
asn1.h	1832	0644	edit dl rm
asn1_ber_bytecode.h	2576	0644	edit dl rm
asn1_decoder.h	468	0644	edit dl rm
asn1_encoder.h	1006	0644	edit dl rm
assoc_array.h	2949	0644	edit dl rm
assoc_array_priv.h	5423	0644	edit dl rm
async.h	4439	0644	edit dl rm
async_tx.h	6860	0644	edit dl rm
ata.h	33799	0644	edit dl rm
atalk.h	4586	0644	edit dl rm
ata_platform.h	749	0644	edit dl rm
ath9k_platform.h	1477	0644	edit dl rm
atm.h	287	0644	edit dl rm
atmdev.h	10477	0644	edit dl rm
atmel-isc-media.h	2115	0644	edit dl rm
atmel-mci.h	1429	0644	edit dl rm
atmel-ssc.h	9971	0644	edit dl rm
atmel_pdc.h	1295	0644	edit dl rm
atm_tcp.h	511	0644	edit dl rm
atomic.h	2644	0644	edit dl rm
attribute_container.h	2803	0644	edit dl rm
audit.h	19921	0644	edit dl rm
auto_dev-ioctl.h	296	0644	edit dl rm
auto_fs.h	278	0644	edit dl rm
auxiliary_bus.h	2539	0644	edit dl rm
auxvec.h	304	0644	edit dl rm
average.h	2481	0644	edit dl rm
backing-dev-defs.h	8753	0644	edit dl rm
backing-dev.h	12189	0644	edit dl rm
backlight.h	13447	0644	edit dl rm
badblocks.h	2188	0644	edit dl rm
balloon_compaction.h	5892	0644	edit dl rm
bcd.h	559	0644	edit dl rm
bch.h	2152	0644	edit dl rm
bcm47xx_nvram.h	1033	0644	edit dl rm
bcm47xx_sprom.h	616	0644	edit dl rm
bcm47xx_wdt.h	555	0644	edit dl rm
bcm963xx_nvram.h	3036	0644	edit dl rm
bcm963xx_tag.h	3685	0644	edit dl rm
binfmts.h	4683	0644	edit dl rm
bio.h	20108	0644	edit dl rm
bitfield.h	5460	0644	edit dl rm
bitmap.h	22664	0644	edit dl rm
bitops.h	8733	0644	edit dl rm
bitrev.h	2594	0644	edit dl rm
bits.h	1387	0644	edit dl rm
bit_spinlock.h	2360	0644	edit dl rm
blk-cgroup.h	22648	0644	edit dl rm
blk-crypto.h	4117	0644	edit dl rm
blk-mq-pci.h	269	0644	edit dl rm
blk-mq-rdma.h	273	0644	edit dl rm
blk-mq-virtio.h	293	0644	edit dl rm
blk-mq.h	19834	0644	edit dl rm
blk-pm.h	708	0644	edit dl rm
blkdev.h	58041	0644	edit dl rm
blkpg.h	436	0644	edit dl rm
blktrace_api.h	3858	0644	edit dl rm
blk_types.h	15669	0644	edit dl rm
blockgroup_lock.h	810	0644	edit dl rm
bma150.h	1286	0644	edit dl rm
bootconfig.h	8712	0644	edit dl rm
bootmem_info.h	1733	0644	edit dl rm
bottom_half.h	974	0644	edit dl rm
bpf-cgroup.h	18796	0644	edit dl rm
bpf-netns.h	1559	0644	edit dl rm
bpf.h	76212	0644	edit dl rm
bpfilter.h	791	0644	edit dl rm
bpfptr.h	2029	0644	edit dl rm
bpf_lirc.h	698	0644	edit dl rm
bpf_local_storage.h	5359	0644	edit dl rm
bpf_lsm.h	1456	0644	edit dl rm
bpf_trace.h	166	0644	edit dl rm
bpf_types.h	5536	0644	edit dl rm
bpf_verifier.h	20865	0644	edit dl rm
brcmphy.h	13994	0644	edit dl rm
bsearch.h	624	0644	edit dl rm
bsg-lib.h	1759	0644	edit dl rm
bsg.h	492	0644	edit dl rm
btf.h	7432	0644	edit dl rm
btf_ids.h	5463	0644	edit dl rm
btree-128.h	2737	0644	edit dl rm
btree-type.h	3991	0644	edit dl rm
btree.h	7000	0644	edit dl rm
btrfs.h	145	0644	edit dl rm
buffer_head.h	14814	0644	edit dl rm
bug.h	2220	0644	edit dl rm
build-salt.h	375	0644	edit dl rm
buildid.h	561	0644	edit dl rm
build_bug.h	2823	0644	edit dl rm
bvec.h	6319	0644	edit dl rm
c2port.h	1384	0644	edit dl rm
cache.h	2616	0644	edit dl rm
cacheinfo.h	3837	0644	edit dl rm
capability.h	8486	0644	edit dl rm
cb710.h	5490	0644	edit dl rm
cciss_ioctl.h	1053	0644	edit dl rm
ccp.h	18577	0644	edit dl rm
cc_platform.h	2378	0644	edit dl rm
cdev.h	845	0644	edit dl rm
cdrom.h	9268	0644	edit dl rm
cfag12864b.h	1509	0644	edit dl rm
cfi.h	1152	0644	edit dl rm
cgroup-defs.h	24815	0644	edit dl rm
cgroup.h	28840	0644	edit dl rm
cgroup_rdma.h	1206	0644	edit dl rm
cgroup_subsys.h	1259	0644	edit dl rm
circ_buf.h	1120	0644	edit dl rm
cleancache.h	3982	0644	edit dl rm
cleanup.h	4986	0644	edit dl rm
clk-provider.h	59330	0644	edit dl rm
clk.h	34418	0644	edit dl rm
clkdev.h	1322	0644	edit dl rm
clockchips.h	7445	0644	edit dl rm
clocksource.h	10227	0644	edit dl rm
clocksource_ids.h	247	0644	edit dl rm
cm4000_cs.h	199	0644	edit dl rm
cma.h	2004	0644	edit dl rm
cnt32_to_63.h	3545	0644	edit dl rm
cn_proc.h	1890	0644	edit dl rm
coda.h	2215	0644	edit dl rm
compaction.h	7319	0644	edit dl rm
compat.h	32122	0644	edit dl rm
compiler-clang.h	4150	0644	edit dl rm
compiler-gcc.h	5021	0644	edit dl rm
compiler-intel.h	949	0644	edit dl rm
compiler-version.h	517	0644	edit dl rm
compiler.h	8553	0644	edit dl rm
compiler_attributes.h	13557	0644	edit dl rm
compiler_types.h	11023	0644	edit dl rm
completion.h	4101	0644	edit dl rm
component.h	4163	0644	edit dl rm
configfs.h	8683	0644	edit dl rm
connector.h	3927	0644	edit dl rm
console.h	7758	0644	edit dl rm
consolemap.h	1076	0644	edit dl rm
console_struct.h	7253	0644	edit dl rm
const.h	421	0644	edit dl rm
container.h	610	0644	edit dl rm
context_tracking.h	3362	0644	edit dl rm
context_tracking_state.h	1616	0644	edit dl rm
cookie.h	1254	0644	edit dl rm
cordic.h	2132	0644	edit dl rm
coredump.h	1154	0644	edit dl rm
coresight-pmu.h	1355	0644	edit dl rm
coresight-stm.h	152	0644	edit dl rm
coresight.h	18449	0644	edit dl rm
counter.h	15318	0644	edit dl rm
count_zeros.h	1453	0644	edit dl rm
cper.h	16963	0644	edit dl rm
cpu.h	8485	0644	edit dl rm
cpufeature.h	1751	0644	edit dl rm
cpufreq.h	33539	0644	edit dl rm
cpuhotplug.h	16949	0644	edit dl rm
cpuidle.h	10516	0644	edit dl rm
cpuidle_haltpoll.h	312	0644	edit dl rm
cpumask.h	30089	0644	edit dl rm
cpuset.h	8351	0644	edit dl rm
cpu_cooling.h	1901	0644	edit dl rm
cpu_pm.h	2433	0644	edit dl rm
cpu_rmap.h	1721	0644	edit dl rm
crash_core.h	3465	0644	edit dl rm
crash_dump.h	4149	0644	edit dl rm
crc-ccitt.h	609	0644	edit dl rm
crc-itu-t.h	531	0644	edit dl rm
crc-t10dif.h	453	0644	edit dl rm
crc4.h	192	0644	edit dl rm
crc7.h	316	0644	edit dl rm
crc8.h	3747	0644	edit dl rm
crc16.h	540	0644	edit dl rm
crc32.h	2894	0644	edit dl rm
crc32c.h	331	0644	edit dl rm
crc32poly.h	610	0644	edit dl rm
crc64.h	280	0644	edit dl rm
cred.h	12804	0644	edit dl rm
crypto.h	27890	0644	edit dl rm
cs5535.h	6277	0644	edit dl rm
ctype.h	1912	0644	edit dl rm
cuda.h	613	0644	edit dl rm
damon.h	10601	0644	edit dl rm
dasd_mod.h	204	0644	edit dl rm
davinci_emac.h	1080	0644	edit dl rm
dax.h	6719	0644	edit dl rm
dca.h	1922	0644	edit dl rm
dcache.h	19076	0644	edit dl rm
dccp.h	10988	0644	edit dl rm
debugfs.h	12253	0644	edit dl rm
debugobjects.h	4085	0644	edit dl rm
debug_locks.h	1627	0644	edit dl rm
delay.h	2490	0644	edit dl rm
delayacct.h	5584	0644	edit dl rm
delayed_call.h	709	0644	edit dl rm
devcoredump.h	2266	0644	edit dl rm
devfreq-event.h	6095	0644	edit dl rm
devfreq.h	14370	0644	edit dl rm
devfreq_cooling.h	2763	0644	edit dl rm
device-mapper.h	19371	0644	edit dl rm
device.h	35226	0644	edit dl rm
device_cgroup.h	1609	0644	edit dl rm
devm-helpers.h	2740	0644	edit dl rm
devpts_fs.h	1156	0644	edit dl rm
dev_printk.h	9883	0644	edit dl rm
dfl.h	2435	0644	edit dl rm
digsig.h	1212	0644	edit dl rm
dim.h	9421	0644	edit dl rm
dio.h	11019	0644	edit dl rm
dirent.h	215	0644	edit dl rm
dlm.h	6005	0644	edit dl rm
dlm_plock.h	532	0644	edit dl rm
dm-bufio.h	4992	0644	edit dl rm
dm-dirty-log.h	4038	0644	edit dl rm
dm-io.h	1980	0644	edit dl rm
dm-kcopyd.h	3013	0644	edit dl rm
dm-region-hash.h	3182	0644	edit dl rm
dm9000.h	987	0644	edit dl rm
dma-buf-map.h	8318	0644	edit dl rm
dma-buf.h	20962	0644	edit dl rm
dma-direct.h	3681	0644	edit dl rm
dma-direction.h	407	0644	edit dl rm
dma-fence-array.h	2191	0644	edit dl rm
dma-fence-chain.h	3144	0644	edit dl rm
dma-fence.h	21357	0644	edit dl rm
dma-heap.h	1616	0644	edit dl rm
dma-iommu.h	2265	0644	edit dl rm
dma-map-ops.h	13197	0644	edit dl rm
dma-mapping.h	20596	0644	edit dl rm
dma-resv.h	12236	0644	edit dl rm
dmaengine.h	54851	0644	edit dl rm
dmapool.h	1832	0644	edit dl rm
dmar.h	7929	0644	edit dl rm
dmi.h	4512	0644	edit dl rm
dnotify.h	1044	0644	edit dl rm
dns_resolver.h	1390	0644	edit dl rm
dqblk_qtree.h	2238	0644	edit dl rm
dqblk_v1.h	327	0644	edit dl rm
dqblk_v2.h	406	0644	edit dl rm
drbd.h	10311	0644	edit dl rm
drbd_genl.h	22010	0644	edit dl rm
drbd_genl_api.h	1808	0644	edit dl rm
drbd_limits.h	8003	0644	edit dl rm
ds2782_battery.h	158	0644	edit dl rm
dtlk.h	3584	0644	edit dl rm
dtpm.h	1684	0644	edit dl rm
dw_apb_timer.h	1566	0644	edit dl rm
dynamic_debug.h	6471	0644	edit dl rm
dynamic_queue_limits.h	3812	0644	edit dl rm
earlycpio.h	359	0644	edit dl rm
ecryptfs.h	3915	0644	edit dl rm
edac.h	19924	0644	edit dl rm
edd.h	1077	0644	edit dl rm
eeprom_93cx6.h	2707	0644	edit dl rm
eeprom_93xx46.h	1062	0644	edit dl rm
efi-bgrt.h	644	0644	edit dl rm
efi.h	43038	0644	edit dl rm
efi_embedded_fw.h	1060	0644	edit dl rm
efs_vh.h	1585	0644	edit dl rm
eisa.h	3031	0644	edit dl rm
elevator.h	5653	0644	edit dl rm
elf-fdpic.h	2030	0644	edit dl rm
elf-randomize.h	583	0644	edit dl rm
elf.h	3030	0644	edit dl rm
elfcore-compat.h	1302	0644	edit dl rm
elfcore.h	4209	0644	edit dl rm
elfnote-lto.h	314	0644	edit dl rm
elfnote.h	3626	0644	edit dl rm
enclosure.h	4112	0644	edit dl rm
energy_model.h	8361	0644	edit dl rm
entry-common.h	17359	0644	edit dl rm
entry-kvm.h	2800	0644	edit dl rm
err.h	1527	0644	edit dl rm
errname.h	283	0644	edit dl rm
errno.h	1481	0644	edit dl rm
error-injection.h	607	0644	edit dl rm
errqueue.h	524	0644	edit dl rm
errseq.h	382	0644	edit dl rm
etherdevice.h	17607	0644	edit dl rm
ethtool.h	32505	0644	edit dl rm
ethtool_netlink.h	2029	0644	edit dl rm
eventfd.h	2336	0644	edit dl rm
eventpoll.h	2472	0644	edit dl rm
evm.h	3500	0644	edit dl rm
export.h	5394	0644	edit dl rm
exportfs.h	8421	0644	edit dl rm
ext2_fs.h	967	0644	edit dl rm
extable.h	1309	0644	edit dl rm
extcon-provider.h	3919	0644	edit dl rm
extcon.h	10399	0644	edit dl rm
f2fs_fs.h	19471	0644	edit dl rm
f75375s.h	541	0644	edit dl rm
falloc.h	1624	0644	edit dl rm
fanotify.h	4547	0644	edit dl rm
fault-inject-usercopy.h	496	0644	edit dl rm
fault-inject.h	1975	0644	edit dl rm
fb.h	28958	0644	edit dl rm
fbcon.h	2256	0644	edit dl rm
fcdevice.h	774	0644	edit dl rm
fcntl.h	1698	0644	edit dl rm
fd.h	490	0644	edit dl rm
fddidevice.h	833	0644	edit dl rm
fdtable.h	3571	0644	edit dl rm
fec.h	463	0644	edit dl rm
fiemap.h	713	0644	edit dl rm
file.h	3158	0644	edit dl rm
fileattr.h	1952	0644	edit dl rm
filter.h	43995	0644	edit dl rm
fips.h	303	0644	edit dl rm
firewire.h	13718	0644	edit dl rm
firmware-map.h	959	0644	edit dl rm
firmware.h	3348	0644	edit dl rm
fixp-arith.h	4290	0644	edit dl rm
flat.h	2629	0644	edit dl rm
flex_proportions.h	2881	0644	edit dl rm
font.h	1714	0644	edit dl rm
fortify-string.h	9329	0644	edit dl rm
freelist.h	3890	0644	edit dl rm
freezer.h	9193	0644	edit dl rm
frontswap.h	3118	0644	edit dl rm
fs.h	125506	0644	edit dl rm
fscache-cache.h	19025	0644	edit dl rm
fscache.h	30303	0644	edit dl rm
fscrypt.h	30622	0644	edit dl rm
fsi-occ.h	681	0644	edit dl rm
fsi-sbefifo.h	629	0644	edit dl rm
fsi.h	2318	0644	edit dl rm
fsl-diu-fb.h	3963	0644	edit dl rm
fsldma.h	202	0644	edit dl rm
fsl_devices.h	4261	0644	edit dl rm
fsl_hypervisor.h	2824	0644	edit dl rm
fsl_ifc.h	25063	0644	edit dl rm
fsnotify.h	10287	0644	edit dl rm
fsnotify_backend.h	30076	0644	edit dl rm
fsverity.h	6914	0644	edit dl rm
fs_context.h	8818	0644	edit dl rm
fs_enet_pd.h	3457	0644	edit dl rm
fs_parser.h	4543	0644	edit dl rm
fs_pin.h	539	0644	edit dl rm
fs_stack.h	811	0644	edit dl rm
fs_struct.h	1066	0644	edit dl rm
fs_types.h	2071	0644	edit dl rm
fs_uart_pd.h	1523	0644	edit dl rm
ftrace.h	35597	0644	edit dl rm
ftrace_irq.h	884	0644	edit dl rm
futex.h	2497	0644	edit dl rm
fwnode.h	7535	0644	edit dl rm
fwnode_mdio.h	858	0644	edit dl rm
gameport.h	5549	0644	edit dl rm
gcd.h	193	0644	edit dl rm
genalloc.h	7912	0644	edit dl rm
generic-radix-tree.h	6504	0644	edit dl rm
genetlink.h	589	0644	edit dl rm
genhd.h	9055	0644	edit dl rm
genl_magic_func.h	11809	0644	edit dl rm
genl_magic_struct.h	7793	0644	edit dl rm
getcpu.h	641	0644	edit dl rm
gfp.h	26892	0644	edit dl rm
glob.h	256	0644	edit dl rm
gnss.h	1601	0644	edit dl rm
goldfish.h	878	0644	edit dl rm
gpio-pxa.h	571	0644	edit dl rm
gpio.h	5423	0644	edit dl rm
gpio_keys.h	1782	0644	edit dl rm
greybus.h	4240	0644	edit dl rm
hardirq.h	3516	0644	edit dl rm
hash.h	3071	0644	edit dl rm
hashtable.h	6827	0644	edit dl rm
hdlc.h	3267	0644	edit dl rm
hdlcdrv.h	6468	0644	edit dl rm
hdmi.h	12705	0644	edit dl rm
hid-debug.h	1458	0644	edit dl rm
hid-roccat.h	484	0644	edit dl rm
hid-sensor-hub.h	9190	0644	edit dl rm
hid-sensor-ids.h	7617	0644	edit dl rm
hid.h	38923	0644	edit dl rm
hidden.h	966	0644	edit dl rm
hiddev.h	1458	0644	edit dl rm
hidraw.h	1146	0644	edit dl rm
highmem-internal.h	5239	0644	edit dl rm
highmem.h	9731	0644	edit dl rm
highuid.h	3194	0644	edit dl rm
hil.h	18857	0644	edit dl rm
hil_mlc.h	5248	0644	edit dl rm
hippidevice.h	1052	0644	edit dl rm
hmm.h	4168	0644	edit dl rm
host1x.h	10993	0644	edit dl rm
hpet.h	2615	0644	edit dl rm
hp_sdc.h	14352	0644	edit dl rm
hrtimer.h	16515	0644	edit dl rm
hrtimer_defs.h	660	0644	edit dl rm
htcpld.h	617	0644	edit dl rm
hugetlb.h	30606	0644	edit dl rm
hugetlb_cgroup.h	7241	0644	edit dl rm
hugetlb_inline.h	374	0644	edit dl rm
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Edit: /usr/src/linux-headers-5.15.0-190/include/linux/ftrace.h (35597B)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Ftrace header.  For implementation details beyond the random comments
 * scattered below, see: Documentation/trace/ftrace-design.rst
 */

#ifndef _LINUX_FTRACE_H
#define _LINUX_FTRACE_H

#include <linux/trace_recursion.h>
#include <linux/trace_clock.h>
#include <linux/kallsyms.h>
#include <linux/linkage.h>
#include <linux/bitops.h>
#include <linux/ptrace.h>
#include <linux/ktime.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/fs.h>

#include <asm/ftrace.h>

/*
 * If the arch supports passing the variable contents of
 * function_trace_op as the third parameter back from the
 * mcount call, then the arch should define this as 1.
 */
#ifndef ARCH_SUPPORTS_FTRACE_OPS
#define ARCH_SUPPORTS_FTRACE_OPS 0
#endif

/*
 * If the arch's mcount caller does not support all of ftrace's
 * features, then it must call an indirect function that
 * does. Or at least does enough to prevent any unwelcome side effects.
 */
#if !ARCH_SUPPORTS_FTRACE_OPS
# define FTRACE_FORCE_LIST_FUNC 1
#else
# define FTRACE_FORCE_LIST_FUNC 0
#endif

/* Main tracing buffer and events set up */
#ifdef CONFIG_TRACING
void trace_init(void);
void early_trace_init(void);
#else
static inline void trace_init(void) { }
static inline void early_trace_init(void) { }
#endif

struct module;
struct ftrace_hash;
struct ftrace_direct_func;

#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_MODULES) && \
	defined(CONFIG_DYNAMIC_FTRACE)
const char *
ftrace_mod_address_lookup(unsigned long addr, unsigned long *size,
		   unsigned long *off, char **modname, char *sym);
#else
static inline const char *
ftrace_mod_address_lookup(unsigned long addr, unsigned long *size,
		   unsigned long *off, char **modname, char *sym)
{
	return NULL;
}
#endif

#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE)
int ftrace_mod_get_kallsym(unsigned int symnum, unsigned long *value,
			   char *type, char *name,
			   char *module_name, int *exported);
#else
static inline int ftrace_mod_get_kallsym(unsigned int symnum, unsigned long *value,
					 char *type, char *name,
					 char *module_name, int *exported)
{
	return -1;
}
#endif

#ifdef CONFIG_FUNCTION_TRACER

extern int ftrace_enabled;
extern int
ftrace_enable_sysctl(struct ctl_table *table, int write,
		     void *buffer, size_t *lenp, loff_t *ppos);

struct ftrace_ops;

#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS

struct ftrace_regs {
	struct pt_regs		regs;
};
#define arch_ftrace_get_regs(fregs) (&(fregs)->regs)

/*
 * ftrace_instruction_pointer_set() is to be defined by the architecture
 * if to allow setting of the instruction pointer from the ftrace_regs
 * when HAVE_DYNAMIC_FTRACE_WITH_ARGS is set and it supports
 * live kernel patching.
 */
#define ftrace_instruction_pointer_set(fregs, ip) do { } while (0)
#endif /* CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS */

static __always_inline struct pt_regs *ftrace_get_regs(struct ftrace_regs *fregs)
{
	if (!fregs)
		return NULL;

return arch_ftrace_get_regs(fregs);
}

typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip,
			      struct ftrace_ops *op, struct ftrace_regs *fregs);

ftrace_func_t ftrace_ops_get_func(struct ftrace_ops *ops);

/*
 * FTRACE_OPS_FL_* bits denote the state of ftrace_ops struct and are
 * set in the flags member.
 * CONTROL, SAVE_REGS, SAVE_REGS_IF_SUPPORTED, RECURSION, STUB and
 * IPMODIFY are a kind of attribute flags which can be set only before
 * registering the ftrace_ops, and can not be modified while registered.
 * Changing those attribute flags after registering ftrace_ops will
 * cause unexpected results.
 *
 * ENABLED - set/unset when ftrace_ops is registered/unregistered
 * DYNAMIC - set when ftrace_ops is registered to denote dynamically
 *           allocated ftrace_ops which need special care
 * SAVE_REGS - The ftrace_ops wants regs saved at each function called
 *            and passed to the callback. If this flag is set, but the
 *            architecture does not support passing regs
 *            (CONFIG_DYNAMIC_FTRACE_WITH_REGS is not defined), then the
 *            ftrace_ops will fail to register, unless the next flag
 *            is set.
 * SAVE_REGS_IF_SUPPORTED - This is the same as SAVE_REGS, but if the
 *            handler can handle an arch that does not save regs
 *            (the handler tests if regs == NULL), then it can set
 *            this flag instead. It will not fail registering the ftrace_ops
 *            but, the regs field will be NULL if the arch does not support
 *            passing regs to the handler.
 *            Note, if this flag is set, the SAVE_REGS flag will automatically
 *            get set upon registering the ftrace_ops, if the arch supports it.
 * RECURSION - The ftrace_ops can set this to tell the ftrace infrastructure
 *            that the call back needs recursion protection. If it does
 *            not set this, then the ftrace infrastructure will assume
 *            that the callback can handle recursion on its own.
 * STUB   - The ftrace_ops is just a place holder.
 * INITIALIZED - The ftrace_ops has already been initialized (first use time
 *            register_ftrace_function() is called, it will initialized the ops)
 * DELETED - The ops are being deleted, do not let them be registered again.
 * ADDING  - The ops is in the process of being added.
 * REMOVING - The ops is in the process of being removed.
 * MODIFYING - The ops is in the process of changing its filter functions.
 * ALLOC_TRAMP - A dynamic trampoline was allocated by the core code.
 *            The arch specific code sets this flag when it allocated a
 *            trampoline. This lets the arch know that it can update the
 *            trampoline in case the callback function changes.
 *            The ftrace_ops trampoline can be set by the ftrace users, and
 *            in such cases the arch must not modify it. Only the arch ftrace
 *            core code should set this flag.
 * IPMODIFY - The ops can modify the IP register. This can only be set with
 *            SAVE_REGS. If another ops with this flag set is already registered
 *            for any of the functions that this ops will be registered for, then
 *            this ops will fail to register or set_filter_ip.
 * PID     - Is affected by set_ftrace_pid (allows filtering on those pids)
 * RCU     - Set when the ops can only be called when RCU is watching.
 * TRACE_ARRAY - The ops->private points to a trace_array descriptor.
 * PERMANENT - Set when the ops is permanent and should not be affected by
 *             ftrace_enabled.
 * DIRECT - Used by the direct ftrace_ops helper for direct functions
 *            (internal ftrace only, should not be used by others)
 */
enum {
	FTRACE_OPS_FL_ENABLED			= BIT(0),
	FTRACE_OPS_FL_DYNAMIC			= BIT(1),
	FTRACE_OPS_FL_SAVE_REGS			= BIT(2),
	FTRACE_OPS_FL_SAVE_REGS_IF_SUPPORTED	= BIT(3),
	FTRACE_OPS_FL_RECURSION			= BIT(4),
	FTRACE_OPS_FL_STUB			= BIT(5),
	FTRACE_OPS_FL_INITIALIZED		= BIT(6),
	FTRACE_OPS_FL_DELETED			= BIT(7),
	FTRACE_OPS_FL_ADDING			= BIT(8),
	FTRACE_OPS_FL_REMOVING			= BIT(9),
	FTRACE_OPS_FL_MODIFYING			= BIT(10),
	FTRACE_OPS_FL_ALLOC_TRAMP		= BIT(11),
	FTRACE_OPS_FL_IPMODIFY			= BIT(12),
	FTRACE_OPS_FL_PID			= BIT(13),
	FTRACE_OPS_FL_RCU			= BIT(14),
	FTRACE_OPS_FL_TRACE_ARRAY		= BIT(15),
	FTRACE_OPS_FL_PERMANENT                 = BIT(16),
	FTRACE_OPS_FL_DIRECT			= BIT(17),
};

#ifdef CONFIG_DYNAMIC_FTRACE
/* The hash used to know what functions callbacks trace */
struct ftrace_ops_hash {
	struct ftrace_hash __rcu	*notrace_hash;
	struct ftrace_hash __rcu	*filter_hash;
	struct mutex			regex_lock;
};

void ftrace_free_init_mem(void);
void ftrace_free_mem(struct module *mod, void *start, void *end);
#else
static inline void ftrace_free_init_mem(void) { }
static inline void ftrace_free_mem(struct module *mod, void *start, void *end) { }
#endif

/*
 * Note, ftrace_ops can be referenced outside of RCU protection, unless
 * the RCU flag is set. If ftrace_ops is allocated and not part of kernel
 * core data, the unregistering of it will perform a scheduling on all CPUs
 * to make sure that there are no more users. Depending on the load of the
 * system that may take a bit of time.
 *
 * Any private data added must also take care not to be freed and if private
 * data is added to a ftrace_ops that is in core code, the user of the
 * ftrace_ops must perform a schedule_on_each_cpu() before freeing it.
 */
struct ftrace_ops {
	ftrace_func_t			func;
	struct ftrace_ops __rcu		*next;
	unsigned long			flags;
	void				*private;
	ftrace_func_t			saved_func;
#ifdef CONFIG_DYNAMIC_FTRACE
	struct ftrace_ops_hash		local_hash;
	struct ftrace_ops_hash		*func_hash;
	struct ftrace_ops_hash		old_hash;
	unsigned long			trampoline;
	unsigned long			trampoline_size;
	struct list_head		list;
#endif
};

extern struct ftrace_ops __rcu *ftrace_ops_list;
extern struct ftrace_ops ftrace_list_end;

/*
 * Traverse the ftrace_ops_list, invoking all entries.  The reason that we
 * can use rcu_dereference_raw_check() is that elements removed from this list
 * are simply leaked, so there is no need to interact with a grace-period
 * mechanism.  The rcu_dereference_raw_check() calls are needed to handle
 * concurrent insertions into the ftrace_ops_list.
 *
 * Silly Alpha and silly pointer-speculation compiler optimizations!
 */
#define do_for_each_ftrace_op(op, list)			\
	op = rcu_dereference_raw_check(list);			\
	do

/*
 * Optimized for just a single item in the list (as that is the normal case).
 */
#define while_for_each_ftrace_op(op)				\
	while (likely(op = rcu_dereference_raw_check((op)->next)) &&	\
	       unlikely((op) != &ftrace_list_end))

/*
 * Type of the current tracing.
 */
enum ftrace_tracing_type_t {
	FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */
	FTRACE_TYPE_RETURN,	/* Hook the return of the function */
};

/* Current tracing type, default is FTRACE_TYPE_ENTER */
extern enum ftrace_tracing_type_t ftrace_tracing_type;

/*
 * The ftrace_ops must be a static and should also
 * be read_mostly.  These functions do modify read_mostly variables
 * so use them sparely. Never free an ftrace_op or modify the
 * next pointer after it has been registered. Even after unregistering
 * it, the next pointer may still be used internally.
 */
int register_ftrace_function(struct ftrace_ops *ops);
int unregister_ftrace_function(struct ftrace_ops *ops);

extern void ftrace_stub(unsigned long a0, unsigned long a1,
			struct ftrace_ops *op, struct ftrace_regs *fregs);

#else /* !CONFIG_FUNCTION_TRACER */
/*
 * (un)register_ftrace_function must be a macro since the ops parameter
 * must not be evaluated.
 */
#define register_ftrace_function(ops) ({ 0; })
#define unregister_ftrace_function(ops) ({ 0; })
static inline void ftrace_kill(void) { }
static inline void ftrace_free_init_mem(void) { }
static inline void ftrace_free_mem(struct module *mod, void *start, void *end) { }
#endif /* CONFIG_FUNCTION_TRACER */

struct ftrace_func_entry {
	struct hlist_node hlist;
	unsigned long ip;
	unsigned long direct; /* for direct lookup only */
};

struct dyn_ftrace;

#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
extern int ftrace_direct_func_count;
int register_ftrace_direct(unsigned long ip, unsigned long addr);
int unregister_ftrace_direct(unsigned long ip, unsigned long addr);
int modify_ftrace_direct(unsigned long ip, unsigned long old_addr, unsigned long new_addr);
struct ftrace_direct_func *ftrace_find_direct_func(unsigned long addr);
int ftrace_modify_direct_caller(struct ftrace_func_entry *entry,
				struct dyn_ftrace *rec,
				unsigned long old_addr,
				unsigned long new_addr);
unsigned long ftrace_find_rec_direct(unsigned long ip);
#else
# define ftrace_direct_func_count 0
static inline int register_ftrace_direct(unsigned long ip, unsigned long addr)
{
	return -ENOTSUPP;
}
static inline int unregister_ftrace_direct(unsigned long ip, unsigned long addr)
{
	return -ENOTSUPP;
}
static inline int modify_ftrace_direct(unsigned long ip,
				       unsigned long old_addr, unsigned long new_addr)
{
	return -ENOTSUPP;
}
static inline struct ftrace_direct_func *ftrace_find_direct_func(unsigned long addr)
{
	return NULL;
}
static inline int ftrace_modify_direct_caller(struct ftrace_func_entry *entry,
					      struct dyn_ftrace *rec,
					      unsigned long old_addr,
					      unsigned long new_addr)
{
	return -ENODEV;
}
static inline unsigned long ftrace_find_rec_direct(unsigned long ip)
{
	return 0;
}
#endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */

#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
/*
 * This must be implemented by the architecture.
 * It is the way the ftrace direct_ops helper, when called
 * via ftrace (because there's other callbacks besides the
 * direct call), can inform the architecture's trampoline that this
 * routine has a direct caller, and what the caller is.
 *
 * For example, in x86, it returns the direct caller
 * callback function via the regs->orig_ax parameter.
 * Then in the ftrace trampoline, if this is set, it makes
 * the return from the trampoline jump to the direct caller
 * instead of going back to the function it just traced.
 */
static inline void arch_ftrace_set_direct_caller(struct pt_regs *regs,
						 unsigned long addr) { }
#endif /* CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */

#ifdef CONFIG_STACK_TRACER

extern int stack_tracer_enabled;

int stack_trace_sysctl(struct ctl_table *table, int write, void *buffer,
		       size_t *lenp, loff_t *ppos);

/* DO NOT MODIFY THIS VARIABLE DIRECTLY! */
DECLARE_PER_CPU(int, disable_stack_tracer);

/**
 * stack_tracer_disable - temporarily disable the stack tracer
 *
 * There's a few locations (namely in RCU) where stack tracing
 * cannot be executed. This function is used to disable stack
 * tracing during those critical sections.
 *
 * This function must be called with preemption or interrupts
 * disabled and stack_tracer_enable() must be called shortly after
 * while preemption or interrupts are still disabled.
 */
static inline void stack_tracer_disable(void)
{
	/* Preemption or interrupts must be disabled */
	if (IS_ENABLED(CONFIG_DEBUG_PREEMPT))
		WARN_ON_ONCE(!preempt_count() || !irqs_disabled());
	this_cpu_inc(disable_stack_tracer);
}

/**
 * stack_tracer_enable - re-enable the stack tracer
 *
 * After stack_tracer_disable() is called, stack_tracer_enable()
 * must be called shortly afterward.
 */
static inline void stack_tracer_enable(void)
{
	if (IS_ENABLED(CONFIG_DEBUG_PREEMPT))
		WARN_ON_ONCE(!preempt_count() || !irqs_disabled());
	this_cpu_dec(disable_stack_tracer);
}
#else
static inline void stack_tracer_disable(void) { }
static inline void stack_tracer_enable(void) { }
#endif

#ifdef CONFIG_DYNAMIC_FTRACE

int ftrace_arch_code_modify_prepare(void);
int ftrace_arch_code_modify_post_process(void);

enum ftrace_bug_type {
	FTRACE_BUG_UNKNOWN,
	FTRACE_BUG_INIT,
	FTRACE_BUG_NOP,
	FTRACE_BUG_CALL,
	FTRACE_BUG_UPDATE,
};
extern enum ftrace_bug_type ftrace_bug_type;

/*
 * Archs can set this to point to a variable that holds the value that was
 * expected at the call site before calling ftrace_bug().
 */
extern const void *ftrace_expected;

void ftrace_bug(int err, struct dyn_ftrace *rec);

struct seq_file;

extern int ftrace_text_reserved(const void *start, const void *end);

struct ftrace_ops *ftrace_ops_trampoline(unsigned long addr);

bool is_ftrace_trampoline(unsigned long addr);

/*
 * The dyn_ftrace record's flags field is split into two parts.
 * the first part which is '0-FTRACE_REF_MAX' is a counter of
 * the number of callbacks that have registered the function that
 * the dyn_ftrace descriptor represents.
 *
 * The second part is a mask:
 *  ENABLED - the function is being traced
 *  REGS    - the record wants the function to save regs
 *  REGS_EN - the function is set up to save regs.
 *  IPMODIFY - the record allows for the IP address to be changed.
 *  DISABLED - the record is not ready to be touched yet
 *  DIRECT   - there is a direct function to call
 *
 * When a new ftrace_ops is registered and wants a function to save
 * pt_regs, the rec->flags REGS is set. When the function has been
 * set up to save regs, the REG_EN flag is set. Once a function
 * starts saving regs it will do so until all ftrace_ops are removed
 * from tracing that function.
 */
enum {
	FTRACE_FL_ENABLED	= (1UL << 31),
	FTRACE_FL_REGS		= (1UL << 30),
	FTRACE_FL_REGS_EN	= (1UL << 29),
	FTRACE_FL_TRAMP		= (1UL << 28),
	FTRACE_FL_TRAMP_EN	= (1UL << 27),
	FTRACE_FL_IPMODIFY	= (1UL << 26),
	FTRACE_FL_DISABLED	= (1UL << 25),
	FTRACE_FL_DIRECT	= (1UL << 24),
	FTRACE_FL_DIRECT_EN	= (1UL << 23),
};

#define FTRACE_REF_MAX_SHIFT	23
#define FTRACE_REF_MAX		((1UL << FTRACE_REF_MAX_SHIFT) - 1)

#define ftrace_rec_count(rec)	((rec)->flags & FTRACE_REF_MAX)

struct dyn_ftrace {
	unsigned long		ip; /* address of mcount call-site */
	unsigned long		flags;
	struct dyn_arch_ftrace	arch;
};

int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip,
			 int remove, int reset);
int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
		       int len, int reset);
int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
			int len, int reset);
void ftrace_set_global_filter(unsigned char *buf, int len, int reset);
void ftrace_set_global_notrace(unsigned char *buf, int len, int reset);
void ftrace_free_filter(struct ftrace_ops *ops);
void ftrace_ops_set_global_filter(struct ftrace_ops *ops);

enum {
	FTRACE_UPDATE_CALLS		= (1 << 0),
	FTRACE_DISABLE_CALLS		= (1 << 1),
	FTRACE_UPDATE_TRACE_FUNC	= (1 << 2),
	FTRACE_START_FUNC_RET		= (1 << 3),
	FTRACE_STOP_FUNC_RET		= (1 << 4),
	FTRACE_MAY_SLEEP		= (1 << 5),
};

/*
 * The FTRACE_UPDATE_* enum is used to pass information back
 * from the ftrace_update_record() and ftrace_test_record()
 * functions. These are called by the code update routines
 * to find out what is to be done for a given function.
 *
 *  IGNORE           - The function is already what we want it to be
 *  MAKE_CALL        - Start tracing the function
 *  MODIFY_CALL      - Stop saving regs for the function
 *  MAKE_NOP         - Stop tracing the function
 */
enum {
	FTRACE_UPDATE_IGNORE,
	FTRACE_UPDATE_MAKE_CALL,
	FTRACE_UPDATE_MODIFY_CALL,
	FTRACE_UPDATE_MAKE_NOP,
};

enum {
	FTRACE_ITER_FILTER	= (1 << 0),
	FTRACE_ITER_NOTRACE	= (1 << 1),
	FTRACE_ITER_PRINTALL	= (1 << 2),
	FTRACE_ITER_DO_PROBES	= (1 << 3),
	FTRACE_ITER_PROBE	= (1 << 4),
	FTRACE_ITER_MOD		= (1 << 5),
	FTRACE_ITER_ENABLED	= (1 << 6),
};

void arch_ftrace_update_code(int command);
void arch_ftrace_update_trampoline(struct ftrace_ops *ops);
void *arch_ftrace_trampoline_func(struct ftrace_ops *ops, struct dyn_ftrace *rec);
void arch_ftrace_trampoline_free(struct ftrace_ops *ops);

struct ftrace_rec_iter;

struct ftrace_rec_iter *ftrace_rec_iter_start(void);
struct ftrace_rec_iter *ftrace_rec_iter_next(struct ftrace_rec_iter *iter);
struct dyn_ftrace *ftrace_rec_iter_record(struct ftrace_rec_iter *iter);

#define for_ftrace_rec_iter(iter)		\
	for (iter = ftrace_rec_iter_start();	\
	     iter;				\
	     iter = ftrace_rec_iter_next(iter))

int ftrace_update_record(struct dyn_ftrace *rec, bool enable);
int ftrace_test_record(struct dyn_ftrace *rec, bool enable);
void ftrace_run_stop_machine(int command);
unsigned long ftrace_location(unsigned long ip);
unsigned long ftrace_location_range(unsigned long start, unsigned long end);
unsigned long ftrace_get_addr_new(struct dyn_ftrace *rec);
unsigned long ftrace_get_addr_curr(struct dyn_ftrace *rec);

extern ftrace_func_t ftrace_trace_function;

int ftrace_regex_open(struct ftrace_ops *ops, int flag,
		  struct inode *inode, struct file *file);
ssize_t ftrace_filter_write(struct file *file, const char __user *ubuf,
			    size_t cnt, loff_t *ppos);
ssize_t ftrace_notrace_write(struct file *file, const char __user *ubuf,
			     size_t cnt, loff_t *ppos);
int ftrace_regex_release(struct inode *inode, struct file *file);

void __init
ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable);

/* defined in arch */
extern int ftrace_ip_converted(unsigned long ip);
extern int ftrace_dyn_arch_init(void);
extern void ftrace_replace_code(int enable);
extern int ftrace_update_ftrace_func(ftrace_func_t func);
extern void ftrace_caller(void);
extern void ftrace_regs_caller(void);
extern void ftrace_call(void);
extern void ftrace_regs_call(void);
extern void mcount_call(void);

void ftrace_modify_all_code(int command);

#ifndef FTRACE_ADDR
#define FTRACE_ADDR ((unsigned long)ftrace_caller)
#endif

#ifndef FTRACE_GRAPH_ADDR
#define FTRACE_GRAPH_ADDR ((unsigned long)ftrace_graph_caller)
#endif

#ifndef FTRACE_REGS_ADDR
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
# define FTRACE_REGS_ADDR ((unsigned long)ftrace_regs_caller)
#else
# define FTRACE_REGS_ADDR FTRACE_ADDR
#endif
#endif

/*
 * If an arch would like functions that are only traced
 * by the function graph tracer to jump directly to its own
 * trampoline, then they can define FTRACE_GRAPH_TRAMP_ADDR
 * to be that address to jump to.
 */
#ifndef FTRACE_GRAPH_TRAMP_ADDR
#define FTRACE_GRAPH_TRAMP_ADDR ((unsigned long) 0)
#endif

#ifdef CONFIG_FUNCTION_GRAPH_TRACER
extern void ftrace_graph_caller(void);
extern int ftrace_enable_ftrace_graph_caller(void);
extern int ftrace_disable_ftrace_graph_caller(void);
#else
static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; }
static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; }
#endif

/**
 * ftrace_make_nop - convert code into nop
 * @mod: module structure if called by module load initialization
 * @rec: the call site record (e.g. mcount/fentry)
 * @addr: the address that the call site should be calling
 *
 * This is a very sensitive operation and great care needs
 * to be taken by the arch.  The operation should carefully
 * read the location, check to see if what is read is indeed
 * what we expect it to be, and then on success of the compare,
 * it should write to the location.
 *
 * The code segment at @rec->ip should be a caller to @addr
 *
 * Return must be:
 *  0 on success
 *  -EFAULT on error reading the location
 *  -EINVAL on a failed compare of the contents
 *  -EPERM  on error writing to the location
 * Any other value will be considered a failure.
 */
extern int ftrace_make_nop(struct module *mod,
			   struct dyn_ftrace *rec, unsigned long addr);

/**
 * ftrace_need_init_nop - return whether nop call sites should be initialized
 *
 * Normally the compiler's -mnop-mcount generates suitable nops, so we don't
 * need to call ftrace_init_nop() if the code is built with that flag.
 * Architectures where this is not always the case may define their own
 * condition.
 *
 * Return must be:
 *  0	    if ftrace_init_nop() should be called
 *  Nonzero if ftrace_init_nop() should not be called
 */

#ifndef ftrace_need_init_nop
#define ftrace_need_init_nop() (!__is_defined(CC_USING_NOP_MCOUNT))
#endif

/**
 * ftrace_init_nop - initialize a nop call site
 * @mod: module structure if called by module load initialization
 * @rec: the call site record (e.g. mcount/fentry)
 *
 * This is a very sensitive operation and great care needs
 * to be taken by the arch.  The operation should carefully
 * read the location, check to see if what is read is indeed
 * what we expect it to be, and then on success of the compare,
 * it should write to the location.
 *
 * The code segment at @rec->ip should contain the contents created by
 * the compiler
 *
 * Return must be:
 *  0 on success
 *  -EFAULT on error reading the location
 *  -EINVAL on a failed compare of the contents
 *  -EPERM  on error writing to the location
 * Any other value will be considered a failure.
 */
#ifndef ftrace_init_nop
static inline int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
{
	return ftrace_make_nop(mod, rec, MCOUNT_ADDR);
}
#endif

/**
 * ftrace_make_call - convert a nop call site into a call to addr
 * @rec: the call site record (e.g. mcount/fentry)
 * @addr: the address that the call site should call
 *
 * This is a very sensitive operation and great care needs
 * to be taken by the arch.  The operation should carefully
 * read the location, check to see if what is read is indeed
 * what we expect it to be, and then on success of the compare,
 * it should write to the location.
 *
 * The code segment at @rec->ip should be a nop
 *
 * Return must be:
 *  0 on success
 *  -EFAULT on error reading the location
 *  -EINVAL on a failed compare of the contents
 *  -EPERM  on error writing to the location
 * Any other value will be considered a failure.
 */
extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr);

#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
/**
 * ftrace_modify_call - convert from one addr to another (no nop)
 * @rec: the call site record (e.g. mcount/fentry)
 * @old_addr: the address expected to be currently called to
 * @addr: the address to change to
 *
 * This is a very sensitive operation and great care needs
 * to be taken by the arch.  The operation should carefully
 * read the location, check to see if what is read is indeed
 * what we expect it to be, and then on success of the compare,
 * it should write to the location.
 *
 * The code segment at @rec->ip should be a caller to @old_addr
 *
 * Return must be:
 *  0 on success
 *  -EFAULT on error reading the location
 *  -EINVAL on a failed compare of the contents
 *  -EPERM  on error writing to the location
 * Any other value will be considered a failure.
 */
extern int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
			      unsigned long addr);
#else
/* Should never be called */
static inline int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
				     unsigned long addr)
{
	return -EINVAL;
}
#endif

/* May be defined in arch */
extern int ftrace_arch_read_dyn_info(char *buf, int size);

extern int skip_trace(unsigned long ip);
extern void ftrace_module_init(struct module *mod);
extern void ftrace_module_enable(struct module *mod);
extern void ftrace_release_mod(struct module *mod);

extern void ftrace_disable_daemon(void);
extern void ftrace_enable_daemon(void);
#else /* CONFIG_DYNAMIC_FTRACE */
static inline int skip_trace(unsigned long ip) { return 0; }
static inline void ftrace_disable_daemon(void) { }
static inline void ftrace_enable_daemon(void) { }
static inline void ftrace_module_init(struct module *mod) { }
static inline void ftrace_module_enable(struct module *mod) { }
static inline void ftrace_release_mod(struct module *mod) { }
static inline int ftrace_text_reserved(const void *start, const void *end)
{
	return 0;
}
static inline unsigned long ftrace_location(unsigned long ip)
{
	return 0;
}

/*
 * Again users of functions that have ftrace_ops may not
 * have them defined when ftrace is not enabled, but these
 * functions may still be called. Use a macro instead of inline.
 */
#define ftrace_regex_open(ops, flag, inod, file) ({ -ENODEV; })
#define ftrace_set_early_filter(ops, buf, enable) do { } while (0)
#define ftrace_set_filter_ip(ops, ip, remove, reset) ({ -ENODEV; })
#define ftrace_set_filter(ops, buf, len, reset) ({ -ENODEV; })
#define ftrace_set_notrace(ops, buf, len, reset) ({ -ENODEV; })
#define ftrace_free_filter(ops) do { } while (0)
#define ftrace_ops_set_global_filter(ops) do { } while (0)

static inline ssize_t ftrace_filter_write(struct file *file, const char __user *ubuf,
			    size_t cnt, loff_t *ppos) { return -ENODEV; }
static inline ssize_t ftrace_notrace_write(struct file *file, const char __user *ubuf,
			     size_t cnt, loff_t *ppos) { return -ENODEV; }
static inline int
ftrace_regex_release(struct inode *inode, struct file *file) { return -ENODEV; }

static inline bool is_ftrace_trampoline(unsigned long addr)
{
	return false;
}
#endif /* CONFIG_DYNAMIC_FTRACE */

/* totally disable ftrace - can not re-enable after this */
void ftrace_kill(void);

static inline void tracer_disable(void)
{
#ifdef CONFIG_FUNCTION_TRACER
	ftrace_enabled = 0;
#endif
}

/*
 * Ftrace disable/restore without lock. Some synchronization mechanism
 * must be used to prevent ftrace_enabled to be changed between
 * disable/restore.
 */
static inline int __ftrace_enabled_save(void)
{
#ifdef CONFIG_FUNCTION_TRACER
	int saved_ftrace_enabled = ftrace_enabled;
	ftrace_enabled = 0;
	return saved_ftrace_enabled;
#else
	return 0;
#endif
}

static inline void __ftrace_enabled_restore(int enabled)
{
#ifdef CONFIG_FUNCTION_TRACER
	ftrace_enabled = enabled;
#endif
}

/* All archs should have this, but we define it for consistency */
#ifndef ftrace_return_address0
# define ftrace_return_address0 __builtin_return_address(0)
#endif

/* Archs may use other ways for ADDR1 and beyond */
#ifndef ftrace_return_address
# ifdef CONFIG_FRAME_POINTER
#  define ftrace_return_address(n) __builtin_return_address(n)
# else
#  define ftrace_return_address(n) 0UL
# endif
#endif

#define CALLER_ADDR0 ((unsigned long)ftrace_return_address0)
#define CALLER_ADDR1 ((unsigned long)ftrace_return_address(1))
#define CALLER_ADDR2 ((unsigned long)ftrace_return_address(2))
#define CALLER_ADDR3 ((unsigned long)ftrace_return_address(3))
#define CALLER_ADDR4 ((unsigned long)ftrace_return_address(4))
#define CALLER_ADDR5 ((unsigned long)ftrace_return_address(5))
#define CALLER_ADDR6 ((unsigned long)ftrace_return_address(6))

static __always_inline unsigned long get_lock_parent_ip(void)
{
	unsigned long addr = CALLER_ADDR0;

if (!in_lock_functions(addr))
		return addr;
	addr = CALLER_ADDR1;
	if (!in_lock_functions(addr))
		return addr;
	return CALLER_ADDR2;
}

#ifdef CONFIG_TRACE_PREEMPT_TOGGLE
  extern void trace_preempt_on(unsigned long a0, unsigned long a1);
  extern void trace_preempt_off(unsigned long a0, unsigned long a1);
#else
/*
 * Use defines instead of static inlines because some arches will make code out
 * of the CALLER_ADDR, when we really want these to be a real nop.
 */
# define trace_preempt_on(a0, a1) do { } while (0)
# define trace_preempt_off(a0, a1) do { } while (0)
#endif

#ifdef CONFIG_FTRACE_MCOUNT_RECORD
extern void ftrace_init(void);
#ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY
#define FTRACE_CALLSITE_SECTION	"__patchable_function_entries"
#else
#define FTRACE_CALLSITE_SECTION	"__mcount_loc"
#endif
#else
static inline void ftrace_init(void) { }
#endif

/*
 * Structure that defines an entry function trace.
 * It's already packed but the attribute "packed" is needed
 * to remove extra padding at the end.
 */
struct ftrace_graph_ent {
	unsigned long func; /* Current function */
	int depth;
} __packed;

/*
 * Structure that defines a return function trace.
 * It's already packed but the attribute "packed" is needed
 * to remove extra padding at the end.
 */
struct ftrace_graph_ret {
	unsigned long func; /* Current function */
	int depth;
	/* Number of functions that overran the depth limit for current task */
	unsigned int overrun;
	unsigned long long calltime;
	unsigned long long rettime;
} __packed;

/* Type of the callback handlers for tracing function graph*/
typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */
typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */

extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace);

#ifdef CONFIG_FUNCTION_GRAPH_TRACER

struct fgraph_ops {
	trace_func_graph_ent_t		entryfunc;
	trace_func_graph_ret_t		retfunc;
};

/*
 * Stack of return addresses for functions
 * of a thread.
 * Used in struct thread_info
 */
struct ftrace_ret_stack {
	unsigned long ret;
	unsigned long func;
	unsigned long long calltime;
#ifdef CONFIG_FUNCTION_PROFILER
	unsigned long long subtime;
#endif
#ifdef HAVE_FUNCTION_GRAPH_FP_TEST
	unsigned long fp;
#endif
#ifdef HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
	unsigned long *retp;
#endif
};

/*
 * Primary handler of a function return.
 * It relays on ftrace_return_to_handler.
 * Defined in entry_32/64.S
 */
extern void return_to_handler(void);

extern int
function_graph_enter(unsigned long ret, unsigned long func,
		     unsigned long frame_pointer, unsigned long *retp);

struct ftrace_ret_stack *
ftrace_graph_get_ret_stack(struct task_struct *task, int idx);

unsigned long ftrace_graph_ret_addr(struct task_struct *task, int *idx,
				    unsigned long ret, unsigned long *retp);

/*
 * Sometimes we don't want to trace a function with the function
 * graph tracer but we want them to keep traced by the usual function
 * tracer if the function graph tracer is not configured.
 */
#define __notrace_funcgraph		notrace

#define FTRACE_RETFUNC_DEPTH 50
#define FTRACE_RETSTACK_ALLOC_SIZE 32

extern int register_ftrace_graph(struct fgraph_ops *ops);
extern void unregister_ftrace_graph(struct fgraph_ops *ops);

extern bool ftrace_graph_is_dead(void);
extern void ftrace_graph_stop(void);

/* The current handlers in use */
extern trace_func_graph_ret_t ftrace_graph_return;
extern trace_func_graph_ent_t ftrace_graph_entry;

extern void ftrace_graph_init_task(struct task_struct *t);
extern void ftrace_graph_exit_task(struct task_struct *t);
extern void ftrace_graph_init_idle_task(struct task_struct *t, int cpu);

static inline void pause_graph_tracing(void)
{
	atomic_inc(&current->tracing_graph_pause);
}

static inline void unpause_graph_tracing(void)
{
	atomic_dec(&current->tracing_graph_pause);
}
#else /* !CONFIG_FUNCTION_GRAPH_TRACER */

#define __notrace_funcgraph

static inline void ftrace_graph_init_task(struct task_struct *t) { }
static inline void ftrace_graph_exit_task(struct task_struct *t) { }
static inline void ftrace_graph_init_idle_task(struct task_struct *t, int cpu) { }

/* Define as macros as fgraph_ops may not be defined */
#define register_ftrace_graph(ops) ({ -1; })
#define unregister_ftrace_graph(ops) do { } while (0)

static inline unsigned long
ftrace_graph_ret_addr(struct task_struct *task, int *idx, unsigned long ret,
		      unsigned long *retp)
{
	return ret;
}

static inline void pause_graph_tracing(void) { }
static inline void unpause_graph_tracing(void) { }
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */

#ifdef CONFIG_TRACING

/* flags for current->trace */
enum {
	TSK_TRACE_FL_TRACE_BIT	= 0,
	TSK_TRACE_FL_GRAPH_BIT	= 1,
};
enum {
	TSK_TRACE_FL_TRACE	= 1 << TSK_TRACE_FL_TRACE_BIT,
	TSK_TRACE_FL_GRAPH	= 1 << TSK_TRACE_FL_GRAPH_BIT,
};

static inline void set_tsk_trace_trace(struct task_struct *tsk)
{
	set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace);
}

static inline void clear_tsk_trace_trace(struct task_struct *tsk)
{
	clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace);
}

static inline int test_tsk_trace_trace(struct task_struct *tsk)
{
	return tsk->trace & TSK_TRACE_FL_TRACE;
}

static inline void set_tsk_trace_graph(struct task_struct *tsk)
{
	set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace);
}

static inline void clear_tsk_trace_graph(struct task_struct *tsk)
{
	clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace);
}

static inline int test_tsk_trace_graph(struct task_struct *tsk)
{
	return tsk->trace & TSK_TRACE_FL_GRAPH;
}

enum ftrace_dump_mode;

extern enum ftrace_dump_mode ftrace_dump_on_oops;
extern int tracepoint_printk;

extern void disable_trace_on_warning(void);
extern int __disable_trace_on_warning;

int tracepoint_printk_sysctl(struct ctl_table *table, int write,
			     void *buffer, size_t *lenp, loff_t *ppos);

#else /* CONFIG_TRACING */
static inline void  disable_trace_on_warning(void) { }
#endif /* CONFIG_TRACING */

#ifdef CONFIG_FTRACE_SYSCALLS

unsigned long arch_syscall_addr(int nr);

#endif /* CONFIG_FTRACE_SYSCALLS */

#endif /* _LINUX_FTRACE_H */

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