The patch titled
i386: add cpu_relax() to cmos_lock()
has been removed from the -mm tree. Its filename was
i386-add-cpu_relax-to-cmos_lock.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: i386: add cpu_relax() to cmos_lock()
From: Andreas Mohr <andi@xxxxxxxx>
Add cpu_relax() to cmos_lock() inline function for faster operation on SMT
CPUs and less power consumption on others in case of lock contention (which
probably doesn't happen too often, so admittedly this patch is not too
exciting).
[akpm@xxxxxxxxxxxxxxxxxxxx: Include the header file for cpu_relax()]
Signed-off-by: Andreas Mohr <andi@xxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-i386/mc146818rtc.h | 5 ++++-
1 files changed, 4 insertions(+), 1 deletion(-)
diff -puN include/asm-i386/mc146818rtc.h~i386-add-cpu_relax-to-cmos_lock include/asm-i386/mc146818rtc.h
--- a/include/asm-i386/mc146818rtc.h~i386-add-cpu_relax-to-cmos_lock
+++ a/include/asm-i386/mc146818rtc.h
@@ -6,6 +6,7 @@
#include <asm/io.h>
#include <asm/system.h>
+#include <asm/processor.h>
#include <linux/mc146818rtc.h>
#ifndef RTC_PORT
@@ -43,8 +44,10 @@ static inline void lock_cmos(unsigned ch
unsigned long new;
new = ((smp_processor_id()+1) << 8) | reg;
for (;;) {
- if (cmos_lock)
+ if (cmos_lock) {
+ cpu_relax();
continue;
+ }
if (__cmpxchg(&cmos_lock, 0, new, sizeof(cmos_lock)) == 0)
return;
}
_
Patches currently in -mm which might be from andi@xxxxxxxx are
working-3d-dri-intel-agpko-resume-for-i815-chip.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
