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authorDavid Chinner <dgc@sgi.com>2007-11-23 08:27:59 +0300
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-02-07 10:14:22 +0300
commita69b176df246d59626e6a9c640b44c0921fa4566 (patch)
treeef763ee32c95da88b4aa119d084d5f022e8e0477 /fs/xfs/xfs_rtalloc.c
parentc319b58b13bb22f9a2478825b06c641c825f51ec (diff)
downloadlinux-a69b176df246d59626e6a9c640b44c0921fa4566.tar.xz
[XFS] Use the generic bitops rather than implementing them ourselves.
Patch inspired by Andi Kleen. SGI-PV: 971186 SGI-Modid: xfs-linux-melb:xfs-kern:30000a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
-rw-r--r--fs/xfs/xfs_rtalloc.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 47082c01872d..ca83ddf72af4 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,
*/
/*
- * 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.
*/
STATIC int /* error */
@@ -444,6 +432,7 @@ 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).
@@ -612,6 +601,8 @@ 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
@@ -669,6 +660,9 @@ 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
@@ -1954,6 +1948,7 @@ 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 =