diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2006-03-18 21:05:53 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2006-03-19 00:34:15 +0100 |
| commit | 334e94de9bea353156abd6f2242d3cc4a24562b0 (patch) | |
| tree | ff4a253e9e3bf487be03bf58727a7ea40a34ba87 /block/ll_rw_blk.c | |
| parent | [PATCH] stop elv_unregister() from rogering other iosched's data, fix locking (diff) | |
| download | linux-334e94de9bea353156abd6f2242d3cc4a24562b0.tar.xz linux-334e94de9bea353156abd6f2242d3cc4a24562b0.zip | |
[PATCH] deal with rmmod/put_io_context() races
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'block/ll_rw_blk.c')
| -rw-r--r-- | block/ll_rw_blk.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index caa8fcf5474b..6dc769182052 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -3477,10 +3477,12 @@ void put_io_context(struct io_context *ioc) BUG_ON(atomic_read(&ioc->refcount) == 0); if (atomic_dec_and_test(&ioc->refcount)) { + rcu_read_lock(); if (ioc->aic && ioc->aic->dtor) ioc->aic->dtor(ioc->aic); if (ioc->cic && ioc->cic->dtor) ioc->cic->dtor(ioc->cic); + rcu_read_unlock(); kmem_cache_free(iocontext_cachep, ioc); } |