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| author |   Will Deacon <will.deacon@arm.com> | 2013-10-09 17:01:21 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2013-10-29 11:06:06 +0000 |
| commit | 2523c67bb6962f98193dce1c73b6efb65a6ea92c (patch) | |
| tree | 0c23d146be95ffcb82405c6b6770ae52421ba19e /tools/perf/scripts | |
| parent | ARM: 7850/1: DEBUG_LL on efm32 SoCs (diff) | |
| download | linux-dev-2523c67bb6962f98193dce1c73b6efb65a6ea92c.tar.xz linux-dev-2523c67bb6962f98193dce1c73b6efb65a6ea92c.zip | |
ARM: 7852/1: cmpxchg: implement barrier-less cmpxchg64_local
Our cmpxchg64 macros are wrappers around atomic64_cmpxchg. Whilst this is
great for code re-use, there is a case for barrier-less cmpxchg where it
is known to be safe (for example cmpxchg64_local and cmpxchg-based
lockrefs).
This patch introduces a 64-bit cmpxchg implementation specifically
for the cmpxchg64_* macros, so that it can be later used by the lockref
code.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'tools/perf/scripts')
0 files changed, 0 insertions, 0 deletions