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| author | Al Viro <viro@zeniv.linux.org.uk> | 2013-10-03 12:46:44 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-10-24 23:43:27 -0400 |
| commit | baa40671d3e3b590a33b2c0e022db61cbebf5c00 (patch) | |
| tree | 7cf63d16ee78ed0fcb1a31f58de25ea4098fb636 | |
| parent | 2d1d9b5b5cc2d7d528a7cbf621d924de38b1b6b6 (diff) | |
| download | linux-stable-baa40671d3e3b590a33b2c0e022db61cbebf5c00.tar.gz linux-stable-baa40671d3e3b590a33b2c0e022db61cbebf5c00.tar.bz2 linux-stable-baa40671d3e3b590a33b2c0e022db61cbebf5c00.zip | |
autofs4: make freeing sbi rcu-delayed
makes ->d_managed() safety in RCU mode independent from vfsmount_lock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/autofs4/autofs_i.h | 1 | ||||
| -rw-r--r-- | fs/autofs4/inode.c | 13 |
2 files changed, 5 insertions, 9 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index ebab147e9700..4218e26df916 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -122,6 +122,7 @@ struct autofs_sb_info { spinlock_t lookup_lock; struct list_head active_list; struct list_head expiring_list; + struct rcu_head rcu; }; static inline struct autofs_sb_info *autofs4_sbi(struct super_block *sb) diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index b104726e2d0a..3b9cc9b973c2 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -56,18 +56,13 @@ void autofs4_kill_sb(struct super_block *sb) * just call kill_anon_super when we are called from * deactivate_super. */ - if (!sbi) - goto out_kill_sb; - - /* Free wait queues, close pipe */ - autofs4_catatonic_mode(sbi); - - sb->s_fs_info = NULL; - kfree(sbi); + if (sbi) /* Free wait queues, close pipe */ + autofs4_catatonic_mode(sbi); -out_kill_sb: DPRINTK("shutting down"); kill_litter_super(sb); + if (sbi) + kfree_rcu(sbi, rcu); } static int autofs4_show_options(struct seq_file *m, struct dentry *root) |