FM / asm

/usr/src/linux-headers-5.15.0-181/arch/arc/include/asm/

/usr/src/linux-headers-5.15.0-181/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-5.15.0-181/arch/arc/include/asm/atomic-spinlock.h (2569B)

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef _ASM_ARC_ATOMIC_SPLOCK_H
#define _ASM_ARC_ATOMIC_SPLOCK_H

/*
 * Non hardware assisted Atomic-R-M-W
 * Locking would change to irq-disabling only (UP) and spinlocks (SMP)
 */

static inline void arch_atomic_set(atomic_t *v, int i)
{
	/*
	 * Independent of hardware support, all of the atomic_xxx() APIs need
	 * to follow the same locking rules to make sure that a "hardware"
	 * atomic insn (e.g. LD) doesn't clobber an "emulated" atomic insn
	 * sequence
	 *
	 * Thus atomic_set() despite being 1 insn (and seemingly atomic)
	 * requires the locking.
	 */
	unsigned long flags;

atomic_ops_lock(flags);
	WRITE_ONCE(v->counter, i);
	atomic_ops_unlock(flags);
}

#define arch_atomic_set_release(v, i)	arch_atomic_set((v), (i))

#define ATOMIC_OP(op, c_op, asm_op)					\
static inline void arch_atomic_##op(int i, atomic_t *v)			\
{									\
	unsigned long flags;						\
									\
	atomic_ops_lock(flags);						\
	v->counter c_op i;						\
	atomic_ops_unlock(flags);					\
}

#define ATOMIC_OP_RETURN(op, c_op, asm_op)				\
static inline int arch_atomic_##op##_return(int i, atomic_t *v)		\
{									\
	unsigned long flags;						\
	unsigned int temp;						\
									\
	/*								\
	 * spin lock/unlock provides the needed smp_mb() before/after	\
	 */								\
	atomic_ops_lock(flags);						\
	temp = v->counter;						\
	temp c_op i;							\
	v->counter = temp;						\
	atomic_ops_unlock(flags);					\
									\
	return temp;							\
}

#define ATOMIC_FETCH_OP(op, c_op, asm_op)				\
static inline int arch_atomic_fetch_##op(int i, atomic_t *v)		\
{									\
	unsigned long flags;						\
	unsigned int orig;						\
									\
	/*								\
	 * spin lock/unlock provides the needed smp_mb() before/after	\
	 */								\
	atomic_ops_lock(flags);						\
	orig = v->counter;						\
	v->counter c_op i;						\
	atomic_ops_unlock(flags);					\
									\
	return orig;							\
}

#define ATOMIC_OPS(op, c_op, asm_op)					\
	ATOMIC_OP(op, c_op, asm_op)					\
	ATOMIC_OP_RETURN(op, c_op, asm_op)				\
	ATOMIC_FETCH_OP(op, c_op, asm_op)

ATOMIC_OPS(add, +=, add)
ATOMIC_OPS(sub, -=, sub)

#undef ATOMIC_OPS
#define ATOMIC_OPS(op, c_op, asm_op)					\
	ATOMIC_OP(op, c_op, asm_op)					\
	ATOMIC_FETCH_OP(op, c_op, asm_op)

ATOMIC_OPS(and, &=, and)
ATOMIC_OPS(andnot, &= ~, bic)
ATOMIC_OPS(or, |=, or)
ATOMIC_OPS(xor, ^=, xor)

#define arch_atomic_andnot		arch_atomic_andnot
#define arch_atomic_fetch_andnot	arch_atomic_fetch_andnot

#undef ATOMIC_OPS
#undef ATOMIC_FETCH_OP
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

#endif

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