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Btrfs: Take the csum mutex while reading checksums

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-07-22 23:06:42 -04:00
parent c286ac48ed
commit ed98b56a63
5 changed files with 12 additions and 5 deletions
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2
fs/btrfs/inode.c
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@ -612,6 +612,7 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
return 0;
path = btrfs_alloc_path();
mutex_lock(&BTRFS_I(inode)->csum_mutex);
item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0);
if (IS_ERR(item)) {
/*
@ -640,6 +641,7 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
found:
set_state_private(io_tree, start, csum);
out:
mutex_unlock(&BTRFS_I(inode)->csum_mutex);
if (path)
btrfs_free_path(path);
return ret;