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| author |   Catalin Marinas <catalin.marinas@arm.com> | 2013-05-31 16:30:58 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-06-07 17:58:31 +0100 |
| commit | 4ecf7ccb1973fd826456b6ab1e6dfafe9023c753 (patch) | |
| tree | 318c48fdfa422908da871d25d2e47903321aabe3 /security | |
| parent | arm64: Remove __flush_dcache_page() (diff) | |
| download | linux-dev-4ecf7ccb1973fd826456b6ab1e6dfafe9023c753.tar.xz linux-dev-4ecf7ccb1973fd826456b6ab1e6dfafe9023c753.zip | |
arm64: spinlock: retry trylock operation if strex fails on free lock
An exclusive store instruction may fail for reasons other than lock
contention (e.g. a cache eviction during the critical section) so, in
line with other architectures using similar exclusive instructions
(alpha, mips, powerpc), retry the trylock operation if the lock appears
to be free but the strex reported failure.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Tony Thompson <anthony.thompson@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions