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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-01-14 22:32:50 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-04-18 20:20:15 +0200 |
| commit | 77e5849688670280b173bb9e0544e9da7b2acc36 (patch) | |
| tree | 7d1bab5108080b74bca1c7a8d54e3be22c67c6e2 /kernel/rcu/srcu.c | |
| parent | rcu: Maintain special bits at bottom of ->dynticks counter (diff) | |
| download | linux-77e5849688670280b173bb9e0544e9da7b2acc36.tar.xz linux-77e5849688670280b173bb9e0544e9da7b2acc36.zip | |
rcu: Make arch select smp_mb__after_unlock_lock() strength
The definition of smp_mb__after_unlock_lock() is currently smp_mb()
for CONFIG_PPC and a no-op otherwise. It would be better to instead
provide an architecture-selectable Kconfig option, and select the
strength of smp_mb__after_unlock_lock() based on that option. This
commit therefore creates ARCH_WEAK_RELEASE_ACQUIRE, has PPC select it,
and bases the definition of smp_mb__after_unlock_lock() on this new
ARCH_WEAK_RELEASE_ACQUIRE Kconfig option.
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Boqun Feng <boqun.feng@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: <linuxppc-dev@lists.ozlabs.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu/srcu.c')
0 files changed, 0 insertions, 0 deletions