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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-10-25 12:03:13 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-11-16 12:15:10 +0300 |
| commit | 22b6430d36659b37ed139b7fd87fcc7237fb0cfd (patch) | |
| tree | adf002ab9aa63ff77b1c0e6ca6fbb02f5c63f5df /arch/s390/include/asm/processor.h | |
| parent | bf0d31c05411f030e7df9f98b5be4d0c6fd5cd39 (diff) | |
| download | linux-22b6430d36659b37ed139b7fd87fcc7237fb0cfd.tar.xz | |
locking/core, s390: Make cpu_relax() a barrier again
stop_machine() seemed to be the only important place for yielding during
cpu_relax(). This was fixed by using cpu_relax_yield().
Therefore, we can now redefine cpu_relax() to be a barrier instead on s390,
making s390 identical to all other architectures.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Noam Camus <noamc@ezchip.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1477386195-32736-4-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 5bb44333d320..79343e37b455 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -236,7 +236,7 @@ static inline unsigned short stap(void) */ void cpu_relax_yield(void); -#define cpu_relax() cpu_relax_yield() +#define cpu_relax() barrier() #define cpu_relax_lowlatency() barrier() #define ECAG_CACHE_ATTRIBUTE 0 |