[PATCH 16/20] x86/cpu: Use alternative_io() in amd_clear_divider()

From: Josh Poimboeuf
Date: Fri Mar 14 2025 - 17:50:49 EST


Use the standard alternative_io() interface.

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
arch/x86/include/asm/processor.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index b458ff0e4c79..d7f3f03594a2 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -709,8 +709,10 @@ static inline u32 per_cpu_l2c_id(unsigned int cpu)
*/
static __always_inline void amd_clear_divider(void)
{
- asm volatile(ALTERNATIVE("", "div %[one]\n\t", X86_BUG_DIV0)
- :: "a" (0), "d" (0), [one] "r" (1));
+ alternative_io("",
+ "div %[one]\n\t", X86_BUG_DIV0,
+ ARG(),
+ ARG("a" (0), "d" (0), [one] "r" (1)));
}

extern void amd_check_microcode(void);
--
2.48.1