The d_set_mounted() doesn't change anything in the filesystem other
than setting the DCACHE_MOUNTED flag in the mount point's dentry
which is protected by d_lock anyway. So we can safely replace
write_seqlock/write_sequnlock by read_seqlock_excl/read_sequnlock_excl.
Signed-off-by: Waiman Long <Waiman.Long@xxxxxx>
---
fs/dcache.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/dcache.c b/fs/dcache.c
index 06f6585..bfdd8af 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1207,7 +1207,7 @@ int d_set_mounted(struct dentry *dentry)
{
struct dentry *p;
int ret = -ENOENT;
- write_seqlock(&rename_lock);
+ read_seqlock_excl(&rename_lock);
for (p = dentry->d_parent; !IS_ROOT(p); p = p->d_parent) {
/* Need exclusion wrt. check_submounts_and_drop() */
spin_lock(&p->d_lock);
@@ -1224,7 +1224,7 @@ int d_set_mounted(struct dentry *dentry)
}
spin_unlock(&dentry->d_lock);
out:
- write_sequnlock(&rename_lock);
+ read_sequnlock_excl(&rename_lock);
return ret;
}
--
1.7.1
--
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