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| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-06-08 12:21:27 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-06-08 12:21:27 +0100 |
| commit | e635a01ea0a16cf7cd31ecd2305870385dca9be6 (patch) | |
| tree | c7153e7dee5caf6ac90d85694ff27e4d0b606290 /fs/ext4/extents.c | |
| parent | 143070e74630b9557e1bb64d899ff2cc5a1dcb48 (diff) | |
| parent | 947391cfbaa3b08558844c0b187bcd0223c3f660 (diff) | |
| download | linux-stable-e635a01ea0a16cf7cd31ecd2305870385dca9be6.tar.gz linux-stable-e635a01ea0a16cf7cd31ecd2305870385dca9be6.tar.bz2 linux-stable-e635a01ea0a16cf7cd31ecd2305870385dca9be6.zip | |
Merge branch 'next-mtd' of git://aeryn.fluff.org.uk/bjdooks/linux
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index e40332158340..e3a55eb8b26a 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -1841,11 +1841,13 @@ ext4_ext_put_in_cache(struct inode *inode, ext4_lblk_t block, { struct ext4_ext_cache *cex; BUG_ON(len == 0); + spin_lock(&EXT4_I(inode)->i_block_reservation_lock); cex = &EXT4_I(inode)->i_cached_extent; cex->ec_type = type; cex->ec_block = block; cex->ec_len = len; cex->ec_start = start; + spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); } /* @@ -1902,12 +1904,17 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, struct ext4_extent *ex) { struct ext4_ext_cache *cex; + int ret = EXT4_EXT_CACHE_NO; + /* + * We borrow i_block_reservation_lock to protect i_cached_extent + */ + spin_lock(&EXT4_I(inode)->i_block_reservation_lock); cex = &EXT4_I(inode)->i_cached_extent; /* has cache valid data? */ if (cex->ec_type == EXT4_EXT_CACHE_NO) - return EXT4_EXT_CACHE_NO; + goto errout; BUG_ON(cex->ec_type != EXT4_EXT_CACHE_GAP && cex->ec_type != EXT4_EXT_CACHE_EXTENT); @@ -1918,11 +1925,11 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, ext_debug("%u cached by %u:%u:%llu\n", block, cex->ec_block, cex->ec_len, cex->ec_start); - return cex->ec_type; + ret = cex->ec_type; } - - /* not in cache */ - return EXT4_EXT_CACHE_NO; +errout: + spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + return ret; } /* @@ -2875,6 +2882,8 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, if (allocated > max_blocks) allocated = max_blocks; set_buffer_unwritten(bh_result); + bh_result->b_bdev = inode->i_sb->s_bdev; + bh_result->b_blocknr = newblock; goto out2; } |