diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/sparc/include/asm/atomic_64.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/sparc/include/asm/atomic_64.h')
-rw-r--r-- | kernel/arch/sparc/include/asm/atomic_64.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/kernel/arch/sparc/include/asm/atomic_64.h b/kernel/arch/sparc/include/asm/atomic_64.h new file mode 100644 index 000000000..408274991 --- /dev/null +++ b/kernel/arch/sparc/include/asm/atomic_64.h @@ -0,0 +1,113 @@ +/* atomic.h: Thankfully the V9 is at least reasonable for this + * stuff. + * + * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com) + */ + +#ifndef __ARCH_SPARC64_ATOMIC__ +#define __ARCH_SPARC64_ATOMIC__ + +#include <linux/types.h> +#include <asm/cmpxchg.h> +#include <asm/barrier.h> + +#define ATOMIC_INIT(i) { (i) } +#define ATOMIC64_INIT(i) { (i) } + +#define atomic_read(v) ACCESS_ONCE((v)->counter) +#define atomic64_read(v) ACCESS_ONCE((v)->counter) + +#define atomic_set(v, i) (((v)->counter) = i) +#define atomic64_set(v, i) (((v)->counter) = i) + +#define ATOMIC_OP(op) \ +void atomic_##op(int, atomic_t *); \ +void atomic64_##op(long, atomic64_t *); + +#define ATOMIC_OP_RETURN(op) \ +int atomic_##op##_return(int, atomic_t *); \ +long atomic64_##op##_return(long, atomic64_t *); + +#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) + +ATOMIC_OPS(add) +ATOMIC_OPS(sub) + +#undef ATOMIC_OPS +#undef ATOMIC_OP_RETURN +#undef ATOMIC_OP + +#define atomic_dec_return(v) atomic_sub_return(1, v) +#define atomic64_dec_return(v) atomic64_sub_return(1, v) + +#define atomic_inc_return(v) atomic_add_return(1, v) +#define atomic64_inc_return(v) atomic64_add_return(1, v) + +/* + * atomic_inc_and_test - increment and test + * @v: pointer of type atomic_t + * + * Atomically increments @v by 1 + * and returns true if the result is zero, or false for all + * other cases. + */ +#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) +#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0) + +#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0) +#define atomic64_sub_and_test(i, v) (atomic64_sub_return(i, v) == 0) + +#define atomic_dec_and_test(v) (atomic_sub_return(1, v) == 0) +#define atomic64_dec_and_test(v) (atomic64_sub_return(1, v) == 0) + +#define atomic_inc(v) atomic_add(1, v) +#define atomic64_inc(v) atomic64_add(1, v) + +#define atomic_dec(v) atomic_sub(1, v) +#define atomic64_dec(v) atomic64_sub(1, v) + +#define atomic_add_negative(i, v) (atomic_add_return(i, v) < 0) +#define atomic64_add_negative(i, v) (atomic64_add_return(i, v) < 0) + +#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) +#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) + +static inline int __atomic_add_unless(atomic_t *v, int a, int u) +{ + int c, old; + c = atomic_read(v); + for (;;) { + if (unlikely(c == (u))) + break; + old = atomic_cmpxchg((v), c, c + (a)); + if (likely(old == c)) + break; + c = old; + } + return c; +} + +#define atomic64_cmpxchg(v, o, n) \ + ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) +#define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) + +static inline long atomic64_add_unless(atomic64_t *v, long a, long u) +{ + long c, old; + c = atomic64_read(v); + for (;;) { + if (unlikely(c == (u))) + break; + old = atomic64_cmpxchg((v), c, c + (a)); + if (likely(old == c)) + break; + c = old; + } + return c != (u); +} + +#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) + +long atomic64_dec_if_positive(atomic64_t *v); + +#endif /* !(__ARCH_SPARC64_ATOMIC__) */ |