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Linux 3.16 compat: smp_mb__after_clear_bit()

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The smp_mb__{before,after}_clear_bit functions have been renamed
smp_mb__{before,after}_atomic.  Rather than adding a compatibility
function to handle this the code has been updated to use smp_wmb().

This has the advantage of being a stable functionally equivalent
interface.  On many architectures smp_mb__after_clear_bit() expands
to smp_wmb().  Others might be able to do something slightly more
efficient but this will be safe and correct on all of them.

Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #386
This commit is contained in:
Turbo Fredriksson 2014-09-14 15:47:22 +00:00 committed by Brian Behlendorf
parent f9bde4f74b
commit e3020723dc
1 changed files with 1 additions and 1 deletions
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2
module/spl/spl-kmem.c
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@ -2365,7 +2365,7 @@ spl_kmem_cache_reap_now(spl_kmem_cache_t *skc, int count)
spl_slab_reclaim(skc, count, 1);
clear_bit(KMC_BIT_REAPING, &skc->skc_flags);
smp_mb__after_clear_bit();
smp_wmb();
wake_up_bit(&skc->skc_flags, KMC_BIT_REAPING);
out:
atomic_dec(&skc->skc_ref);