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authorThomas Gleixner <tglx@linutronix.de>2011-05-14 10:06:36 (GMT)
committerThomas Gleixner <tglx@linutronix.de>2011-05-14 10:06:36 (GMT)
commita18f22a968de17b29f2310cdb7ba69163e65ec15 (patch)
treea7d56d88fad5e444d7661484109758a2f436129e /arch/s390/include/asm/atomic.h
parenta1c57e0fec53defe745e64417eacdbd3618c3e66 (diff)
parent798778b8653f64b7b2162ac70eca10367cff6ce8 (diff)
downloadlinux-fsl-qoriq-a18f22a968de17b29f2310cdb7ba69163e65ec15.tar.xz
Merge branch 'consolidate-clksrc-i8253' of master.kernel.org:~rmk/linux-2.6-arm into timers/clocksource
Conflicts: arch/ia64/kernel/cyclone.c arch/mips/kernel/i8253.c arch/x86/kernel/i8253.c Reason: Resolve conflicts so further cleanups do not conflict further Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/s390/include/asm/atomic.h')
-rw-r--r--arch/s390/include/asm/atomic.h28
1 files changed, 19 insertions, 9 deletions
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h
index 76daea1..d9db138 100644
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -9,7 +9,7 @@
*
* Atomic operations that C can't guarantee us.
* Useful for resource counting etc.
- * s390 uses 'Compare And Swap' for atomicity in SMP enviroment.
+ * s390 uses 'Compare And Swap' for atomicity in SMP environment.
*
*/
@@ -36,14 +36,19 @@
static inline int atomic_read(const atomic_t *v)
{
- barrier();
- return v->counter;
+ int c;
+
+ asm volatile(
+ " l %0,%1\n"
+ : "=d" (c) : "Q" (v->counter));
+ return c;
}
static inline void atomic_set(atomic_t *v, int i)
{
- v->counter = i;
- barrier();
+ asm volatile(
+ " st %1,%0\n"
+ : "=Q" (v->counter) : "d" (i));
}
static inline int atomic_add_return(int i, atomic_t *v)
@@ -128,14 +133,19 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
static inline long long atomic64_read(const atomic64_t *v)
{
- barrier();
- return v->counter;
+ long long c;
+
+ asm volatile(
+ " lg %0,%1\n"
+ : "=d" (c) : "Q" (v->counter));
+ return c;
}
static inline void atomic64_set(atomic64_t *v, long long i)
{
- v->counter = i;
- barrier();
+ asm volatile(
+ " stg %1,%0\n"
+ : "=Q" (v->counter) : "d" (i));
}
static inline long long atomic64_add_return(long long i, atomic64_t *v)