From: Brian Foster Date: Thu, 4 Jun 2015 03:03:34 +0000 (+1000) Subject: xfs: fix sparse inodes 32-bit compile failure X-Git-Tag: firefly_0821_release~176^2~1521^2~3^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3cdaa1898ff3b16f69619cb5df2f45158e104817;p=firefly-linux-kernel-4.4.55.git xfs: fix sparse inodes 32-bit compile failure The kbuild test robot reports the following compilation failure with a 32-bit kernel configuration: fs/built-in.o: In function `xfs_ifree_cluster': >> xfs_inode.c:(.text+0x17ac84): undefined reference to `__umoddi3' This is due to the use of the modulus operator on a 64-bit variable in the ASSERT() added as part of the following commit: xfs: skip unallocated regions of inode chunks in xfs_ifree_cluster() This ASSERT() simply checks that the offset of the inode in a sparse cluster is appropriately aligned. Since the maximum inode record offset is 63 (for a 64 inode record) and the calculated offset here should be something less than that, just use a 32-bit variable to store the offset and call the do_mod() helper. Reported-by: kbuild test robot Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 11a8c28c47bd..a17cf1f16498 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -2248,6 +2248,7 @@ xfs_ifree_cluster( int inodes_per_cluster; int nbufs; int i, j; + int ioffset; xfs_daddr_t blkno; xfs_buf_t *bp; xfs_inode_t *ip; @@ -2268,9 +2269,9 @@ xfs_ifree_cluster( * physically allocated. Skip the cluster if an inode falls into * a sparse region. */ - if ((xic->alloc & XFS_INOBT_MASK(inum - xic->first_ino)) == 0) { - ASSERT(((inum - xic->first_ino) % - inodes_per_cluster) == 0); + ioffset = inum - xic->first_ino; + if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) { + ASSERT(do_mod(ioffset, inodes_per_cluster) == 0); continue; }