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author | Ingo Molnar <mingo@elte.hu> | 2012-03-01 09:26:41 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2012-03-01 09:26:43 (GMT) |
commit | 7e4d960993331e92567f0180e45322a93e6780ba (patch) | |
tree | 4d7444035303fc0b545e88afbd894176344fb2a3 /fs/super.c | |
parent | de5bdff7a72acc281219be2b8edeeca1fd81c542 (diff) | |
parent | 164974a8f2a482f1abcb027c6d1a89dd79b14297 (diff) | |
download | linux-fsl-qoriq-7e4d960993331e92567f0180e45322a93e6780ba.tar.xz |
Merge branch 'linus' into sched/core
Merge reason: we'll queue up dependent patches.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/super.c')
-rw-r--r-- | fs/super.c | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -634,6 +634,28 @@ rescan: EXPORT_SYMBOL(get_super); /** + * get_super_thawed - get thawed superblock of a device + * @bdev: device to get the superblock for + * + * Scans the superblock list and finds the superblock of the file system + * mounted on the device. The superblock is returned once it is thawed + * (or immediately if it was not frozen). %NULL is returned if no match + * is found. + */ +struct super_block *get_super_thawed(struct block_device *bdev) +{ + while (1) { + struct super_block *s = get_super(bdev); + if (!s || s->s_frozen == SB_UNFROZEN) + return s; + up_read(&s->s_umount); + vfs_check_frozen(s, SB_FREEZE_WRITE); + put_super(s); + } +} +EXPORT_SYMBOL(get_super_thawed); + +/** * get_active_super - get an active reference to the superblock of a device * @bdev: device to get the superblock for * |