From 79071eb0b2f142b9cc6531d04fa2915943938b5e Mon Sep 17 00:00:00 2001 From: David Chinner Date: Wed, 13 Aug 2008 15:41:12 +1000 Subject: [XFS] Use the generic bitops rather than implementing them ourselves. This keeps xfs_lowbit64 as it was since there aren't good generic helpers there ... Patch inspired by Andi Kleen. SGI-PV: 981498 SGI-Modid: xfs-linux-melb:xfs-kern:31472a Signed-off-by: David Chinner Signed-off-by: Eric Sandeen Signed-off-by: Donald Douwsma Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_rtalloc.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) (limited to 'fs/xfs/xfs_rtalloc.c') diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index bf87a5913504..e2f68de16159 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -73,18 +73,6 @@ STATIC int xfs_rtmodify_summary(xfs_mount_t *, xfs_trans_t *, int, * Internal functions. */ -/* - * xfs_lowbit32: get low bit set out of 32-bit argument, -1 if none set. - */ -STATIC int -xfs_lowbit32( - __uint32_t v) -{ - if (v) - return ffs(v) - 1; - return -1; -} - /* * Allocate space to the bitmap or summary file, and zero it, for growfs. */ @@ -450,6 +438,7 @@ xfs_rtallocate_extent_near( } bbno = XFS_BITTOBLOCK(mp, bno); i = 0; + ASSERT(minlen != 0); log2len = xfs_highbit32(minlen); /* * Loop over all bitmap blocks (bbno + i is current block). @@ -618,6 +607,8 @@ xfs_rtallocate_extent_size( xfs_suminfo_t sum; /* summary information for extents */ ASSERT(minlen % prod == 0 && maxlen % prod == 0); + ASSERT(maxlen != 0); + /* * Loop over all the levels starting with maxlen. * At each level, look at all the bitmap blocks, to see if there @@ -675,6 +666,9 @@ xfs_rtallocate_extent_size( *rtblock = NULLRTBLOCK; return 0; } + ASSERT(minlen != 0); + ASSERT(maxlen != 0); + /* * Loop over sizes, from maxlen down to minlen. * This time, when we do the allocations, allow smaller ones @@ -1961,6 +1955,7 @@ xfs_growfs_rt( nsbp->sb_blocksize * nsbp->sb_rextsize); nsbp->sb_rextents = nsbp->sb_rblocks; do_div(nsbp->sb_rextents, nsbp->sb_rextsize); + ASSERT(nsbp->sb_rextents != 0); nsbp->sb_rextslog = xfs_highbit32(nsbp->sb_rextents); nrsumlevels = nmp->m_rsumlevels = nsbp->sb_rextslog + 1; nrsumsize = -- cgit v1.2.3-59-g8ed1b