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| author | Ingo Molnar <mingo@kernel.org> | 2016-07-27 12:35:35 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-27 12:35:35 +0200 |
| commit | df15929f8f5c69e987c31bf016eca4a38dba46f0 (patch) | |
| tree | cfb5fe5e8ebff4cabd70557a304f355546943cc9 /arch/tile/lib/spinlock_64.c | |
| parent | efaad554b4ffae1840a2759e09e21325ddbc8b05 (diff) | |
| parent | 37e13a1ebe32c4fbfbdb5413f42eb6e71d8b28a4 (diff) | |
| download | linux-df15929f8f5c69e987c31bf016eca4a38dba46f0.tar.bz2 | |
Merge branch 'linus' into x86/microcode, to pick up merge window changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/tile/lib/spinlock_64.c')
| -rw-r--r-- | arch/tile/lib/spinlock_64.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/tile/lib/spinlock_64.c b/arch/tile/lib/spinlock_64.c index c8d1f94ff1fe..a4b5b2cbce93 100644 --- a/arch/tile/lib/spinlock_64.c +++ b/arch/tile/lib/spinlock_64.c @@ -76,6 +76,12 @@ void arch_spin_unlock_wait(arch_spinlock_t *lock) do { delay_backoff(iterations++); } while (arch_spin_current(READ_ONCE(lock->lock)) == curr); + + /* + * The TILE architecture doesn't do read speculation; therefore + * a control dependency guarantees a LOAD->{LOAD,STORE} order. + */ + barrier(); } EXPORT_SYMBOL(arch_spin_unlock_wait); |