namei: make put_link() RCU-safe
very simple - just make path_put() conditional on !RCU.
Note that right now it doesn't get called in RCU mode -
we leave it before getting anything into stack.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index 4303404..998c3c2 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -750,7 +750,8 @@
struct inode *inode = last->inode;
if (last->cookie && inode->i_op->put_link)
inode->i_op->put_link(inode, last->cookie);
- path_put(&last->link);
+ if (!(nd->flags & LOOKUP_RCU))
+ path_put(&last->link);
}
int sysctl_protected_symlinks __read_mostly = 0;