From: Uros Bizjak <ubizjak@gmail.com>
Date: Tue, 16 Dec 2025 10:51:20 +0000 (+0100)
Subject: x86/asm: Use inout "+" asm onstraint modifiers in __iowrite32_copy()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=09fbb775f1d01945119c4a0be4afacf30cc86796;p=thirdparty%2Fkernel%2Flinux.git

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

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
---

diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index ca309a3227c78..2ea25745e0591 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -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