6.11-stable review patch. If anyone has any objections, please let me know.
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From: Uros Bizjak ubizjak@gmail.com
[ Upstream commit 8b64db9733c2e4d30fd068d0b9dcef7b4424b035 ]
CONFIG_X86_CMPXCHG64 variant of x86_32 __alternative_atomic64() macro uses CALL instruction inside asm statement. Use ALT_OUTPUT_SP() macro to add required dependence on %esp register.
Fixes: 819165fb34b9 ("x86: Adjust asm constraints in atomic64 wrappers") Signed-off-by: Uros Bizjak ubizjak@gmail.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lkml.kernel.org/r/20241103160954.3329-1-ubizjak@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/include/asm/atomic64_32.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/atomic64_32.h b/arch/x86/include/asm/atomic64_32.h index 8db2ec4d6cdac..18818f6859f05 100644 --- a/arch/x86/include/asm/atomic64_32.h +++ b/arch/x86/include/asm/atomic64_32.h @@ -51,7 +51,8 @@ static __always_inline s64 arch_atomic64_read_nonatomic(const atomic64_t *v) #ifdef CONFIG_X86_CMPXCHG64 #define __alternative_atomic64(f, g, out, in...) \ asm volatile("call %c[func]" \ - : out : [func] "i" (atomic64_##g##_cx8), ## in) + : ALT_OUTPUT_SP(out) \ + : [func] "i" (atomic64_##g##_cx8), ## in)
#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8) #else