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Diffstat (limited to 'arch/x86/include/asm/refcount.h')
-rw-r--r--arch/x86/include/asm/refcount.h22
1 files changed, 18 insertions, 4 deletions
diff --git a/arch/x86/include/asm/refcount.h b/arch/x86/include/asm/refcount.h
index dbaed55c1c244..232f856e0db06 100644
--- a/arch/x86/include/asm/refcount.h
+++ b/arch/x86/include/asm/refcount.h
@@ -67,16 +67,30 @@ static __always_inline void refcount_dec(refcount_t *r)
static __always_inline __must_check
bool refcount_sub_and_test(unsigned int i, refcount_t *r)
{
- return GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl",
+ bool ret = GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl",
REFCOUNT_CHECK_LT_ZERO,
r->refs.counter, e, "er", i, "cx");
+
+ if (ret) {
+ smp_acquire__after_ctrl_dep();
+ return true;
+ }
+
+ return false;
}
static __always_inline __must_check bool refcount_dec_and_test(refcount_t *r)
{
- return GEN_UNARY_SUFFIXED_RMWcc(LOCK_PREFIX "decl",
- REFCOUNT_CHECK_LT_ZERO,
- r->refs.counter, e, "cx");
+ bool ret = GEN_UNARY_SUFFIXED_RMWcc(LOCK_PREFIX "decl",
+ REFCOUNT_CHECK_LT_ZERO,
+ r->refs.counter, e, "cx");
+
+ if (ret) {
+ smp_acquire__after_ctrl_dep();
+ return true;
+ }
+
+ return false;
}
static __always_inline __must_check