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um/asm: Replace "REP; NOP" with PAUSE mnemonic

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Current minimum required version of binutils is 2.25,
which supports PAUSE instruction mnemonic.

Replace "REP; NOP" with this proper mnemonic.

No functional change intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
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>
Cc: David Laight <david.laight.linux@gmail.com>
Link: https://patch.msgid.link/20250418083436.133148-2-ubizjak@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Uros Bizjak 2025-04-18 10:33:59 +02:00 committed by Johannes Berg
parent 9c88156b2c
commit 304c9f7f8f
1 changed files with 2 additions and 2 deletions
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4
arch/x86/um/asm/processor.h
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@ -21,10 +21,10 @@
#include <asm/user.h>
/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
/* PAUSE is a good thing to insert into busy-wait loops. */
static __always_inline void native_pause(void)
{
__asm__ __volatile__("rep;nop": : :"memory");
__asm__ __volatile__("pause": : :"memory");
}
static __always_inline void cpu_relax(void)