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author | David S. Miller <davem@davemloft.net> | 2012-02-27 06:55:51 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2012-02-27 06:55:51 +0400 |
commit | ff4783ce78c08d2990126ce1874250ae8e72bbd2 (patch) | |
tree | 5c95885a4ab768101dd72942b57c238d452a7565 /fs/super.c | |
parent | 622121719934f60378279eb440d3cec2fc3176d2 (diff) | |
parent | 203738e548cefc3fc3c2f73a9063176c9f3583d5 (diff) | |
download | linux-ff4783ce78c08d2990126ce1874250ae8e72bbd2.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/ethernet/sfc/rx.c
Overlapping changes in drivers/net/ethernet/sfc/rx.c, one to change
the rx_buf->is_page boolean into a set of u16 flags, and another to
adjust how ->ip_summed is initialized.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/super.c')
-rw-r--r-- | fs/super.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c index 6015c02296b7..6277ec6cb60a 100644 --- a/fs/super.c +++ b/fs/super.c @@ -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 * |