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locking/atomic/x86: Use ALT_OUTPUT_SP() for __alternative_atomic64()

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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: 819165fb34 ("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
This commit is contained in:
Uros Bizjak 2024-11-03 17:09:31 +01:00 committed by Peter Zijlstra
parent 36c2cf8880
commit 8b64db9733
1 changed files with 2 additions and 1 deletions
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3
arch/x86/include/asm/atomic64_32.h
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@ -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