[PATCH 2/5 -tip] cifs: umount_begin BKL pushdown

Alessio Igor Bogani
2009-04-23T19:13:14Z

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
---
fs/cifs/cifsfs.c | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 38491fd..9517ae1 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -35,6 +35,7 @@
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
+#include <linux/smp_lock.h>
#include "cifsfs.h"
#include "cifspdu.h"
#define DECLARE_GLOBALS_HERE
@@ -525,18 +526,26 @@ static void cifs_umount_begin(struct super_block *sb)
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifsTconInfo *tcon;

- if (cifs_sb == NULL)
+ lock_kernel();
+
+ if (cifs_sb == NULL) {
+ unlock_kernel();
return;
+ }

tcon = cifs_sb->tcon;
- if (tcon == NULL)
+ if (tcon == NULL) {
+ unlock_kernel();
return;
+ }

read_lock(&cifs_tcp_ses_lock);
if (tcon->tc_count == 1)
tcon->tidStatus = CifsExiting;
read_unlock(&cifs_tcp_ses_lock);

+ unlock_kernel();
+
/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
/* cancel_notify_requests(tcon); */
if (tcon->ses && tcon->ses->server) {
--
1.6.0.4