From: Jan Kara Date: Mon, 31 May 2010 02:49:38 +0000 (-0400) Subject: ext4: Fix estimate of # of blocks needed to write indirect-mapped files X-Git-Tag: firefly_0821_release~10186^2~1329 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=112ba39e2f19652f2baa3823e5ca76848717d905;p=firefly-linux-kernel-4.4.55.git ext4: Fix estimate of # of blocks needed to write indirect-mapped files commit d330a5befb88875a9b3d2db62f9b74dadf660b13 upstream (as of v2.6.34-rc3) http://bugzilla.kernel.org/show_bug.cgi?id=15420 Signed-off-by: Jan Kara Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 65176242886a..4bee50fb8b3b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1060,7 +1060,7 @@ static int ext4_indirect_calc_metadata_amount(struct inode *inode, sector_t lblock) { struct ext4_inode_info *ei = EXT4_I(inode); - int dind_mask = EXT4_ADDR_PER_BLOCK(inode->i_sb) - 1; + sector_t dind_mask = ~((sector_t)EXT4_ADDR_PER_BLOCK(inode->i_sb) - 1); int blk_bits; if (lblock < EXT4_NDIR_BLOCKS) @@ -1075,7 +1075,7 @@ static int ext4_indirect_calc_metadata_amount(struct inode *inode, } ei->i_da_metadata_calc_last_lblock = lblock & dind_mask; ei->i_da_metadata_calc_len = 1; - blk_bits = roundup_pow_of_two(lblock + 1); + blk_bits = order_base_2(lblock); return (blk_bits / EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb)) + 1; }