linux-kernel - [PATCH 01/20] x86/cpu: Use named asm operands in prefetch[w]()

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Message-ID: <0e7fb0082e4d4d2b303819a2cef243a32fd86774.1741988314.git.jpoimboe@kernel.org>
Date: Fri, 14 Mar 2025 14:41:14 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Uros Bizjak <ubizjak@...il.com>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: [PATCH 01/20] x86/cpu: Use named asm operands in prefetch[w]()

Use named operands in preparation for removing the operand numbering
restrictions in alternative_input().

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 arch/x86/include/asm/processor.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 5d2f7e5aff26..2e9566134949 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -613,7 +613,7 @@ extern char			ignore_fpu_irq;
 # define BASE_PREFETCH		""
 # define ARCH_HAS_PREFETCH
 #else
-# define BASE_PREFETCH		"prefetcht0 %1"
+# define BASE_PREFETCH		"prefetcht0 %[val]"
 #endif
 
 /*
@@ -624,9 +624,9 @@ extern char			ignore_fpu_irq;
  */
 static inline void prefetch(const void *x)
 {
-	alternative_input(BASE_PREFETCH, "prefetchnta %1",
-			  X86_FEATURE_XMM,
-			  "m" (*(const char *)x));
+	alternative_input(BASE_PREFETCH,
+			  "prefetchnta %[val]", X86_FEATURE_XMM,
+			  [val] "m" (*(const char *)x));
 }
 
 /*
@@ -636,9 +636,9 @@ static inline void prefetch(const void *x)
  */
 static __always_inline void prefetchw(const void *x)
 {
-	alternative_input(BASE_PREFETCH, "prefetchw %1",
-			  X86_FEATURE_3DNOWPREFETCH,
-			  "m" (*(const char *)x));
+	alternative_input(BASE_PREFETCH,
+			  "prefetchw %[val]", X86_FEATURE_3DNOWPREFETCH,
+			  [val] "m" (*(const char *)x));
 }
 
 #define TOP_OF_INIT_STACK ((unsigned long)&init_stack + sizeof(init_stack) - \
-- 
2.48.1