[PATCH 04/20] x86/cpu: Use named asm operands in clflushopt()

From: Josh Poimboeuf
Date: Fri Mar 14 2025 - 17:48:27 EST


Use named operands in preparation for removing the operand numbering
restrictions in alternative_io().

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
arch/x86/include/asm/special_insns.h | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h
index 21ce480658b1..b905076cf7f6 100644
--- a/arch/x86/include/asm/special_insns.h
+++ b/arch/x86/include/asm/special_insns.h
@@ -176,10 +176,9 @@ static __always_inline void clflush(volatile void *__p)

static inline void clflushopt(volatile void *__p)
{
- alternative_io(".byte 0x3e; clflush %0",
- ".byte 0x66; clflush %0",
- X86_FEATURE_CLFLUSHOPT,
- "+m" (*(volatile char __force *)__p));
+ alternative_io(".byte 0x3e; clflush %[val]",
+ ".byte 0x66; clflush %[val]", X86_FEATURE_CLFLUSHOPT,
+ [val] "+m" (*(volatile char __force *)__p));
}

static inline void clwb(volatile void *__p)
--
2.48.1