leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

btrfs: replace uuid_mutex by device_list_mutex in btrfs_open_devices

Browse Source 
btrfs_open_devices() is using the uuid_mutex, but as btrfs_open_devices
is just limited to openning all the devices under for given fsid, so we
don't need uuid_mutex.

Instead it should hold the device_list_mutex as it updates the members
of the btrfs_fs_devices and btrfs_device and not the whole fs_devs list.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2018-04-12 10:29:34 +08:00 committed by David Sterba
parent 3dd0f7a364
commit 542c5908ab
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/btrfs/volumes.c
View File

@ -1146,7 +1146,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
{ {
int ret; int ret;
mutex_lock(&uuid_mutex); mutex_lock(&fs_devices->device_list_mutex);
if (fs_devices->opened) { if (fs_devices->opened) {
fs_devices->opened++; fs_devices->opened++;
ret = 0; ret = 0;
@ -1154,7 +1154,8 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
list_sort(NULL, &fs_devices->devices, devid_cmp); list_sort(NULL, &fs_devices->devices, devid_cmp);
ret = open_fs_devices(fs_devices, flags, holder); ret = open_fs_devices(fs_devices, flags, holder);
} }
mutex_unlock(&uuid_mutex); mutex_unlock(&fs_devices->device_list_mutex);
return ret; return ret;
} }