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 <ubiz...@gmail.com>
Cc: Richard Weinberger <rich...@nod.at>
Cc: Anton Ivanov <anton.iva...@cambridgegreys.com>
Cc: Johannes Berg <johan...@sipsolutions.net>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: David Laight <david.laight.li...@gmail.com>
---
v2: Rename rep_nop() to native_pause() first.
---
arch/x86/um/asm/processor.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/um/asm/processor.h b/arch/x86/um/asm/processor.h
index d50549e0089c..e222d2ae28fd 100644
--- a/arch/x86/um/asm/processor.h
+++ b/arch/x86/um/asm/processor.h
@@ -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)
--
2.49.0
