FM / asm

/usr/src/linux-headers-5.15.0-190/arch/arc/include/asm/

/usr/src/linux-headers-5.15.0-190/arch/arc/include/asm

Name	Size	Mode	Actions
arcregs.h	9477	0644	edit dl rm
asm-offsets.h	165	0644	edit dl rm
asserts.h	958	0644	edit dl rm
atomic-llsc.h	2864	0644	edit dl rm
atomic-spinlock.h	2569	0644	edit dl rm
atomic.h	1153	0644	edit dl rm
atomic64-arcv2.h	6095	0644	edit dl rm
barrier.h	1376	0644	edit dl rm
bitops.h	3885	0644	edit dl rm
bug.h	819	0644	edit dl rm
cache.h	3604	0644	edit dl rm
cacheflush.h	3824	0644	edit dl rm
checksum.h	2371	0644	edit dl rm
cmpxchg.h	3188	0644	edit dl rm
current.h	549	0644	edit dl rm
delay.h	1896	0644	edit dl rm
disasm.h	3813	0644	edit dl rm
dma.h	313	0644	edit dl rm
dsp-impl.h	3860	0644	edit dl rm
dsp.h	796	0644	edit dl rm
dwarf.h	746	0644	edit dl rm
elf.h	1935	0644	edit dl rm
entry-arcv2.h	7419	0644	edit dl rm
entry-compact.h	8810	0644	edit dl rm
entry.h	6687	0644	edit dl rm
exec.h	264	0644	edit dl rm
fb.h	411	0644	edit dl rm
fpu.h	1125	0644	edit dl rm
futex.h	3611	0644	edit dl rm
highmem.h	1422	0644	edit dl rm
hugepage.h	2071	0644	edit dl rm
io.h	6291	0644	edit dl rm
irq.h	679	0644	edit dl rm
irqflags-arcv2.h	3491	0644	edit dl rm
irqflags-compact.h	4293	0644	edit dl rm
irqflags.h	363	0644	edit dl rm
jump_label.h	1976	0644	edit dl rm
Kbuild	153	0644	edit dl rm
kdebug.h	254	0644	edit dl rm
kgdb.h	1239	0644	edit dl rm
kprobes.h	1186	0644	edit dl rm
linkage.h	1484	0644	edit dl rm
mach_desc.h	1943	0644	edit dl rm
mmu-arcv2.h	2494	0644	edit dl rm
mmu.h	387	0644	edit dl rm
mmu_context.h	5568	0644	edit dl rm
module.h	428	0644	edit dl rm
page.h	3313	0644	edit dl rm
pci.h	360	0644	edit dl rm
perf_event.h	6879	0644	edit dl rm
pgalloc.h	2888	0644	edit dl rm
pgtable-bits-arcv2.h	4896	0644	edit dl rm
pgtable-levels.h	5626	0644	edit dl rm
pgtable.h	780	0644	edit dl rm
processor.h	3253	0644	edit dl rm
ptrace.h	3759	0644	edit dl rm
sections.h	261	0644	edit dl rm
segment.h	476	0644	edit dl rm
serial.h	498	0644	edit dl rm
setup.h	1274	0644	edit dl rm
shmparam.h	296	0644	edit dl rm
smp.h	3823	0644	edit dl rm
spinlock.h	8580	0644	edit dl rm
spinlock_types.h	905	0644	edit dl rm
stacktrace.h	1178	0644	edit dl rm
string.h	1036	0644	edit dl rm
switch_to.h	553	0644	edit dl rm
syscall.h	1738	0644	edit dl rm
syscalls.h	547	0644	edit dl rm
thread_info.h	3339	0644	edit dl rm
timex.h	362	0644	edit dl rm
tlb.h	262	0644	edit dl rm
tlbflush.h	1654	0644	edit dl rm
uaccess.h	17019	0644	edit dl rm
unaligned.h	625	0644	edit dl rm
unwind.h	3446	0644	edit dl rm
vermagic.h	157	0644	edit dl rm
vmalloc.h	87	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/arch/arc/include/asm/jump_label.h (1976B)

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_ARC_JUMP_LABEL_H
#define _ASM_ARC_JUMP_LABEL_H

#ifndef __ASSEMBLY__

#include <linux/stringify.h>
#include <linux/types.h>

#define JUMP_LABEL_NOP_SIZE 4

/*
 * NOTE about '.balign 4':
 *
 * To make atomic update of patched instruction available we need to guarantee
 * that this instruction doesn't cross L1 cache line boundary.
 *
 * As of today we simply align instruction which can be patched by 4 byte using
 * ".balign 4" directive. In that case patched instruction is aligned with one
 * 16-bit NOP_S if this is required.
 * However 'align by 4' directive is much stricter than it actually required.
 * It's enough that our 32-bit instruction don't cross L1 cache line boundary /
 * L1 I$ fetch block boundary which can be achieved by using
 * ".bundle_align_mode" assembler directive. That will save us from adding
 * useless NOP_S padding in most of the cases.
 *
 * TODO: switch to ".bundle_align_mode" directive using whin it will be
 * supported by ARC toolchain.
 */

static __always_inline bool arch_static_branch(struct static_key *key,
					       bool branch)
{
	asm_volatile_goto(".balign "__stringify(JUMP_LABEL_NOP_SIZE)"	\n"
		 "1:							\n"
		 "nop							\n"
		 ".pushsection __jump_table, \"aw\"			\n"
		 ".word 1b, %l[l_yes], %c0				\n"
		 ".popsection						\n"
		 : : "i" (&((char *)key)[branch]) : : l_yes);

return false;
l_yes:
	return true;
}

static __always_inline bool arch_static_branch_jump(struct static_key *key,
						    bool branch)
{
	asm_volatile_goto(".balign "__stringify(JUMP_LABEL_NOP_SIZE)"	\n"
		 "1:							\n"
		 "b %l[l_yes]						\n"
		 ".pushsection __jump_table, \"aw\"			\n"
		 ".word 1b, %l[l_yes], %c0				\n"
		 ".popsection						\n"
		 : : "i" (&((char *)key)[branch]) : : l_yes);

return false;
l_yes:
	return true;
}

typedef u32 jump_label_t;

struct jump_entry {
	jump_label_t code;
	jump_label_t target;
	jump_label_t key;
};

#endif  /* __ASSEMBLY__ */
#endif

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