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| author | Jens Axboe <axboe@kernel.dk> | 2013-11-08 17:08:12 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-11-08 17:08:12 +0100 |
| commit | e37459b8e2c7db6735e39e019e448b76e5e77647 (patch) | |
| tree | a3f0944db87a8ae0d41e5acbbbabc1e7ef534d1b /kernel | |
| parent | block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO (diff) | |
| parent | blk-mq: don't disallow request merges for req->special being set (diff) | |
| download | linux-e37459b8e2c7db6735e39e019e448b76e5e77647.tar.xz linux-e37459b8e2c7db6735e39e019e448b76e5e77647.zip | |
Merge branch 'blk-mq/core' into for-3.13/core
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Conflicts:
block/blk-timeout.c
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/smp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index 0564571dcdf7..dbc3d42d2c68 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -18,6 +18,7 @@ #ifdef CONFIG_USE_GENERIC_SMP_HELPERS enum { CSD_FLAG_LOCK = 0x01, + CSD_FLAG_WAIT = 0x02, }; struct call_function_data { @@ -124,7 +125,7 @@ static void csd_lock(struct call_single_data *csd) static void csd_unlock(struct call_single_data *csd) { - WARN_ON(!(csd->flags & CSD_FLAG_LOCK)); + WARN_ON((csd->flags & CSD_FLAG_WAIT) && !(csd->flags & CSD_FLAG_LOCK)); /* * ensure we're all done before releasing data: @@ -146,6 +147,9 @@ void generic_exec_single(int cpu, struct call_single_data *csd, int wait) unsigned long flags; int ipi; + if (wait) + csd->flags |= CSD_FLAG_WAIT; + raw_spin_lock_irqsave(&dst->lock, flags); ipi = list_empty(&dst->list); list_add_tail(&csd->list, &dst->list); @@ -340,6 +344,7 @@ void __smp_call_function_single(int cpu, struct call_single_data *csd, } put_cpu(); } +EXPORT_SYMBOL_GPL(__smp_call_function_single); /** * smp_call_function_many(): Run a function on a set of other CPUs. |