From: Uros Bizjak <ubizjak@gmail.com>
To: x86@kernel.org, linux-kernel@vger.kernel.org
Cc: Uros Bizjak <ubizjak@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: [PATCH RESEND] x86/asm: Use inout "+" asm onstraint modifiers in __iowrite32_copy()
Date: Mon, 10 Nov 2025 23:31:39 +0100 [thread overview]
Message-ID: <20251110223247.54486-1-ubizjak@gmail.com> (raw)
Use inout "+" asm constraint modifiers to simplify asm operands.
No functional changes intended.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
arch/x86/include/asm/io.h | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index ca309a3227c7..2ea25745e059 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
--
2.51.1
next reply other threads:[~2025-11-10 22:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-10 22:31 Uros Bizjak [this message]
2026-01-20 20:51 ` [PATCH RESEND] x86/asm: Use inout "+" asm onstraint modifiers in __iowrite32_copy() H. Peter Anvin
-- strict thread matches above, loose matches on Subject: below --
2025-12-16 10:51 Uros Bizjak
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