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x86/asm: Use inout "+" asm onstraint modifiers in __iowrite32_copy()

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Use inout "+" asm constraint modifiers to simplify asm operands.

No functional changes intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Link: https://patch.msgid.link/20251216105134.248196-1-ubizjak@gmail.com
This commit is contained in:
Uros Bizjak
2025-12-16 11:51:20 +01:00
committed by Borislav Petkov (AMD)
parent 11439c4635
commit 09fbb775f1
1 changed files with 2 additions and 3 deletions
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5
arch/x86/include/asm/io.h
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@@ -218,9 +218,8 @@ static inline void __iowrite32_copy(void __iomem *to, const void *from,
size_t count)
{
asm volatile("rep movsl"
: "=&c"(count), "=&D"(to), "=&S"(from)
: "0"(count), "1"(to), "2"(from)
: "memory");
: "+D"(to), "+S"(from), "+c"(count)
: : "memory");
}
#define __iowrite32_copy __iowrite32_copy
#endif