Michael Ellerman 3405d230b3 powerpc: Add support for the optimised lockref implementation ... This commit adds the architecture support required to enable the optimised implementation of lockrefs. That's as simple as defining arch_spin_value_unlocked() and selecting the Kconfig option. We also define cmpxchg64_relaxed(), because the lockref code does not need the cmpxchg to have barrier semantics. Using Linus' test case[1] on one system I see a 4x improvement for the basic enablement, and a further 1.3x for cmpxchg64_relaxed(), for a total of 5.3x vs the baseline. On another system I see more like 2x improvement. [1]: http://marc.info/?l=linux-fsdevel&m=137782380714721&w=4 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>		2014-01-28 14:45:43 +11:00
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alpha	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha	2013-11-20 15:03:45 -08:00
arc	Final set of ARC changes for 3.13-rc1	2013-11-19 11:44:15 -08:00
arm	Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm	2013-11-22 09:56:51 -08:00
arm64	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
avr32	avr32: uapi: be sure of "_UAPI" prefix for all guard macros	2013-11-20 09:53:22 +01:00
blackfin	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
c6x	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
cris	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
frv	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
hexagon	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
ia64	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-11-20 14:25:39 -08:00
m32r	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
m68k	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
metag	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
microblaze	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
mips	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
mn10300	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
openrisc	OpenRISC updates for 3.13	2013-11-15 14:26:38 -08:00
parisc	parisc: size_t is unsigned, so comparison size < 0 doesn't make sense.	2013-11-20 00:09:42 +01:00
powerpc	powerpc: Add support for the optimised lockref implementation	2014-01-28 14:45:43 +11:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2013-11-19 11:43:21 -08:00
score	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
sh	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
sparc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2013-11-19 15:50:03 -08:00
tile	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
um	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml	2013-11-19 11:42:32 -08:00
unicore32	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
x86	Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux	2013-11-22 10:56:11 -08:00
xtensa	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
.gitignore
Kconfig	kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS	2013-11-15 09:32:22 +09:00