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| author | David S. Miller <davem@davemloft.net> | 2013-03-27 13:52:49 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-27 13:52:49 -0400 |
| commit | e2a553dbf18a5177fdebe29495c32a8e7fd3a4db (patch) | |
| tree | 5ccb3d498325a7aaf93f49549eca03cb7861ca1c /fs/cifs/cifsfs.c | |
| parent | 7559d97993ae7d552c96313155286f372cf4cf7c (diff) | |
| parent | a8c45289f215e137825bf9630d0abb41c1dc41ff (diff) | |
| download | olio-linux-3.10-e2a553dbf18a5177fdebe29495c32a8e7fd3a4db.tar.xz olio-linux-3.10-e2a553dbf18a5177fdebe29495c32a8e7fd3a4db.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
include/net/ipip.h
The changes made to ipip.h in 'net' were already included
in 'net-next' before that header was moved to another location.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/cifs/cifsfs.c')
| -rw-r--r-- | fs/cifs/cifsfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 3cf8a15af91..345fc89c428 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -91,6 +91,30 @@ struct workqueue_struct *cifsiod_wq; __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE]; #endif +/* + * Bumps refcount for cifs super block. + * Note that it should be only called if a referece to VFS super block is + * already held, e.g. in open-type syscalls context. Otherwise it can race with + * atomic_dec_and_test in deactivate_locked_super. + */ +void +cifs_sb_active(struct super_block *sb) +{ + struct cifs_sb_info *server = CIFS_SB(sb); + + if (atomic_inc_return(&server->active) == 1) + atomic_inc(&sb->s_active); +} + +void +cifs_sb_deactive(struct super_block *sb) +{ + struct cifs_sb_info *server = CIFS_SB(sb); + + if (atomic_dec_and_test(&server->active)) + deactivate_super(sb); +} + static int cifs_read_super(struct super_block *sb) { |