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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-09 12:35:53 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-09 12:35:53 -0800
commit263a5c8e16c34199ddf6de3f102e789ffa3ee26e (patch)
tree4f049e339d522b2ab0ba3bed3ec217e4bbc83d35 /fs/super.c
parentRevert "sysfs: Kill nlink counting." (diff)
parentLinux 3.3-rc6 (diff)
downloadlinux-dev-263a5c8e16c34199ddf6de3f102e789ffa3ee26e.tar.xz
linux-dev-263a5c8e16c34199ddf6de3f102e789ffa3ee26e.zip
Merge 3.3-rc6 into driver-core-next
This was done to resolve a conflict in the drivers/base/cpu.c file. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/super.c')
-rw-r--r--fs/super.c22
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
*