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authorStefan Behrens <sbehrens@giantdisaster.de>2012-08-27 08:30:03 -0600
committerChris Mason <chris.mason@oracle.com>2012-08-28 16:53:39 -0400
commit5ee0844d6427e7338e0aba748f62b62d07ea2ed0 (patch)
tree27980140d38e5158d64f24a5027beb46b52bc476 /fs/btrfs/volumes.c
parent68ce9682a4bb95d6be5529cb57214bf2a1b7d20e (diff)
Btrfs: revert checksum error statistic which can cause a BUG()
Commit 442a4f6308e694e0fa6025708bd5e4e424bbf51c added btrfs device statistic counters for detected IO and checksum errors to Linux 3.5. The statistic part that counts checksum errors in end_bio_extent_readpage() can cause a BUG() in a subfunction: "kernel BUG at fs/btrfs/volumes.c:3762!" That part is reverted with the current patch. However, the counting of checksum errors in the scrub context remains active, and the counting of detected IO errors (read, write or flush errors) in all contexts remains active. Cc: stable <stable@vger.kernel.org> # 3.5 Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c22
1 files changed, 0 insertions, 22 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0b1e69d380dd..3f4e70e171ed 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4610,28 +4610,6 @@ int btrfs_read_sys_array(struct btrfs_root *root)
return ret;
}
-struct btrfs_device *btrfs_find_device_for_logical(struct btrfs_root *root,
- u64 logical, int mirror_num)
-{
- struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
- int ret;
- u64 map_length = 0;
- struct btrfs_bio *bbio = NULL;
- struct btrfs_device *device;
-
- BUG_ON(mirror_num == 0);
- ret = btrfs_map_block(map_tree, WRITE, logical, &map_length, &bbio,
- mirror_num);
- if (ret) {
- BUG_ON(bbio != NULL);
- return NULL;
- }
- BUG_ON(mirror_num != bbio->mirror_num);
- device = bbio->stripes[mirror_num - 1].dev;
- kfree(bbio);
- return device;
-}
-
int btrfs_read_chunk_tree(struct btrfs_root *root)
{
struct btrfs_path *path;