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authorPeng Tao <bergwolf@gmail.com>2012-01-12 23:18:47 +0800
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-12 16:39:04 -0500
commit93a3844ee0f843b05a1df4b52e1a19ff26b98d24 (patch)
treeefd2ca7a8a711e779a04c47af6166abd8f844073 /fs/nfs
parent57582b372f63d0f655b1a35b0d306d73d1a46775 (diff)
pnfsblock: don't spinlock when freeing block_dev
bl_free_block_dev() may sleep. We can not call it with spinlock held. Besides, there is no need to take bm_lock as we are last user freeing bm_devlist. Cc: <stable@vger.kernel.org> #3.1+ Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/blocklayout/blocklayout.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 06fe0802118..6d39e9ab1e6 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -780,16 +780,13 @@ bl_cleanup_layoutcommit(struct nfs4_layoutcommit_data *lcdata)
static void free_blk_mountid(struct block_mount_id *mid)
{
if (mid) {
- struct pnfs_block_dev *dev;
- spin_lock(&mid->bm_lock);
- while (!list_empty(&mid->bm_devlist)) {
- dev = list_first_entry(&mid->bm_devlist,
- struct pnfs_block_dev,
- bm_node);
+ struct pnfs_block_dev *dev, *tmp;
+
+ /* No need to take bm_lock as we are last user freeing bm_devlist */
+ list_for_each_entry_safe(dev, tmp, &mid->bm_devlist, bm_node) {
list_del(&dev->bm_node);
bl_free_block_dev(dev);
}
- spin_unlock(&mid->bm_lock);
kfree(mid);
}
}