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Message-ID: <4631b5fb3e33af925f4bd82ecb56a5facff354cf.1741988314.git.jpoimboe@kernel.org>
Date: Fri, 14 Mar 2025 14:41:30 -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 17/20] x86/smap: Use named asm operands in smap_{save,restore}()
Use named operands in preparation for using alternative_io().
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
arch/x86/include/asm/smap.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/smap.h b/arch/x86/include/asm/smap.h
index 2de1e5a75c57..60ea21b4c8b7 100644
--- a/arch/x86/include/asm/smap.h
+++ b/arch/x86/include/asm/smap.h
@@ -40,9 +40,9 @@ static __always_inline unsigned long smap_save(void)
unsigned long flags;
asm volatile ("# smap_save\n\t"
- ALTERNATIVE("", "pushf; pop %0; " "clac" "\n\t",
- X86_FEATURE_SMAP)
- : "=rm" (flags) : : "memory", "cc");
+ ALTERNATIVE("",
+ "pushf; pop %[flags]; clac\n\t", X86_FEATURE_SMAP)
+ : [flags] "=rm" (flags) : : "memory", "cc");
return flags;
}
@@ -50,9 +50,9 @@ static __always_inline unsigned long smap_save(void)
static __always_inline void smap_restore(unsigned long flags)
{
asm volatile ("# smap_restore\n\t"
- ALTERNATIVE("", "push %0; popf\n\t",
- X86_FEATURE_SMAP)
- : : "g" (flags) : "memory", "cc");
+ ALTERNATIVE("",
+ "push %[flags]; popf\n\t", X86_FEATURE_SMAP)
+ : : [flags] "g" (flags) : "memory", "cc");
}
/* These macros can be used in asm() statements */
--
2.48.1
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