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xfs: devirtualize ->m_dirnameops

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Instead of causing a relatively expensive indirect call for each
hashing and comparism of a file name in a directory just use an
inline function and a simple branch on the ASCII CI bit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: fix unused variable warning]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-11-11 12:59:26 -08:00 • committed by Darrick J. Wong
parent 537dabcfdb
commit d8d11fc703
10 changed files with 42 additions and 58 deletions
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fs/xfs/libxfs/xfs_dir2_data.c
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@ -236,7 +236,7 @@ __xfs_dir3_data_check(
((char *)dep - (char *)hdr));
name.name = dep->name;
name.len = dep->namelen;
hash = mp->m_dirnameops->hashname(&name);
hash = xfs_dir2_hashname(mp, &name);
for (i = 0; i < be32_to_cpu(btp->count); i++) {
if (be32_to_cpu(lep[i].address) == addr &&
be32_to_cpu(lep[i].hashval) == hash)