[PATCH] x86/asm: Use alternative_input() in amd_clear_divider()
From: Uros Bizjak
Date: Fri Mar 14 2025 - 04:14:47 EST
Use higher-level API to declare assembly with alternatives.
bloat-o-meter reports no code size changes.
Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
---
arch/x86/include/asm/processor.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 5d2f7e5aff26..b4b5aa46f68b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -707,8 +707,9 @@ static inline u32 per_cpu_l2c_id(unsigned int cpu)
*/
static __always_inline void amd_clear_divider(void)
{
- asm volatile(ALTERNATIVE("", "div %2\n\t", X86_BUG_DIV0)
- :: "a" (0), "d" (0), "r" (1));
+ alternative_input("", "div %[den]",
+ X86_BUG_DIV0,
+ "a" (0), "d" (0), [den] "r" (1));
}
extern void amd_check_microcode(void);
--
2.48.1