forked from Minki/linux
9255813d58
As a step towards making the atomic64 API use consistent types treewide, let's have the generic atomic64 implementation use s64 as the underlying type for atomic64_t, rather than long long, matching the generated headers. Otherwise, there should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Cc: aou@eecs.berkeley.edu Cc: bp@alien8.de Cc: catalin.marinas@arm.com Cc: davem@davemloft.net Cc: fenghua.yu@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: ink@jurassic.park.msu.ru Cc: jhogan@kernel.org Cc: linux@armlinux.org.uk Cc: mattst88@gmail.com Cc: mpe@ellerman.id.au Cc: palmer@sifive.com Cc: paul.burton@mips.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: rth@twiddle.net Cc: tony.luck@intel.com Cc: vgupta@synopsys.com Link: https://lkml.kernel.org/r/20190522132250.26499-4-mark.rutland@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Generic implementation of 64-bit atomics using spinlocks,
|
|
* useful on processors that don't have 64-bit atomic instructions.
|
|
*
|
|
* Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
|
|
*/
|
|
#ifndef _ASM_GENERIC_ATOMIC64_H
|
|
#define _ASM_GENERIC_ATOMIC64_H
|
|
#include <linux/types.h>
|
|
|
|
typedef struct {
|
|
s64 counter;
|
|
} atomic64_t;
|
|
|
|
#define ATOMIC64_INIT(i) { (i) }
|
|
|
|
extern s64 atomic64_read(const atomic64_t *v);
|
|
extern void atomic64_set(atomic64_t *v, s64 i);
|
|
|
|
#define atomic64_set_release(v, i) atomic64_set((v), (i))
|
|
|
|
#define ATOMIC64_OP(op) \
|
|
extern void atomic64_##op(s64 a, atomic64_t *v);
|
|
|
|
#define ATOMIC64_OP_RETURN(op) \
|
|
extern s64 atomic64_##op##_return(s64 a, atomic64_t *v);
|
|
|
|
#define ATOMIC64_FETCH_OP(op) \
|
|
extern s64 atomic64_fetch_##op(s64 a, atomic64_t *v);
|
|
|
|
#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_OP_RETURN(op) ATOMIC64_FETCH_OP(op)
|
|
|
|
ATOMIC64_OPS(add)
|
|
ATOMIC64_OPS(sub)
|
|
|
|
#undef ATOMIC64_OPS
|
|
#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_FETCH_OP(op)
|
|
|
|
ATOMIC64_OPS(and)
|
|
ATOMIC64_OPS(or)
|
|
ATOMIC64_OPS(xor)
|
|
|
|
#undef ATOMIC64_OPS
|
|
#undef ATOMIC64_FETCH_OP
|
|
#undef ATOMIC64_OP_RETURN
|
|
#undef ATOMIC64_OP
|
|
|
|
extern s64 atomic64_dec_if_positive(atomic64_t *v);
|
|
#define atomic64_dec_if_positive atomic64_dec_if_positive
|
|
extern s64 atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n);
|
|
extern s64 atomic64_xchg(atomic64_t *v, s64 new);
|
|
extern s64 atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u);
|
|
#define atomic64_fetch_add_unless atomic64_fetch_add_unless
|
|
|
|
#endif /* _ASM_GENERIC_ATOMIC64_H */
|