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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2016-11-28 17:50:48 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-04-12 09:43:33 +0300
commit02c503ff237cdcd8e012a122a638295550db10a5 (patch)
treecb5af588f282809cab4d37b1d4a6847814cda5ee /arch/s390/include/asm/atomic_ops.h
parentdf26c2e87e6cf3ced1fbd589e40d633a6a7f20cb (diff)
downloadlinux-02c503ff237cdcd8e012a122a638295550db10a5.tar.xz
s390/spinlock: use atomic primitives for spinlocks
Add a couple more __atomic_xxx function to atomic_ops.h and use them to replace the compare-and-swap inlines in the spinlock code. This changes the type of the lock value from unsigned int to int. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/atomic_ops.h')
-rw-r--r--arch/s390/include/asm/atomic_ops.h22
1 files changed, 12 insertions, 10 deletions
diff --git a/arch/s390/include/asm/atomic_ops.h b/arch/s390/include/asm/atomic_ops.h
index ac9e2b939d04..ba6d29412344 100644
--- a/arch/s390/include/asm/atomic_ops.h
+++ b/arch/s390/include/asm/atomic_ops.h
@@ -111,20 +111,22 @@ __ATOMIC64_OPS(__atomic64_xor, "xgr")
static inline int __atomic_cmpxchg(int *ptr, int old, int new)
{
- asm volatile(
- " cs %[old],%[new],%[ptr]"
- : [old] "+d" (old), [ptr] "+Q" (*ptr)
- : [new] "d" (new) : "cc", "memory");
- return old;
+ return __sync_val_compare_and_swap(ptr, old, new);
+}
+
+static inline int __atomic_cmpxchg_bool(int *ptr, int old, int new)
+{
+ return __sync_bool_compare_and_swap(ptr, old, new);
}
static inline long __atomic64_cmpxchg(long *ptr, long old, long new)
{
- asm volatile(
- " csg %[old],%[new],%[ptr]"
- : [old] "+d" (old), [ptr] "+Q" (*ptr)
- : [new] "d" (new) : "cc", "memory");
- return old;
+ return __sync_val_compare_and_swap(ptr, old, new);
+}
+
+static inline long __atomic64_cmpxchg_bool(long *ptr, long old, long new)
+{
+ return __sync_bool_compare_and_swap(ptr, old, new);
}
#endif /* __ARCH_S390_ATOMIC_OPS__ */