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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:55 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:28 +1100
commitfb045adb99d9b7c562dc7fef834857f78249daa1 (patch)
tree1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/nfs/getroot.c
parent5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff)
downloadop-kernel-dev-fb045adb99d9b7c562dc7fef834857f78249daa1.zip
op-kernel-dev-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.gz
fs: dcache reduce branches in lookup path
Reduce some branches and memory accesses in dcache lookup by adding dentry flags to indicate common d_ops are set, rather than having to check them. This saves a pointer memory access (dentry->d_op) in common path lookup situations, and saves another pointer load and branch in cases where we have d_op but not the particular operation. Patched with: git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/nfs/getroot.c')
-rw-r--r--fs/nfs/getroot.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index b3e36c3..c3a5a11 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -121,7 +121,7 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
security_d_instantiate(ret, inode);
if (ret->d_op == NULL)
- ret->d_op = server->nfs_client->rpc_ops->dentry_ops;
+ d_set_d_op(ret, server->nfs_client->rpc_ops->dentry_ops);
out:
nfs_free_fattr(fsinfo.fattr);
return ret;
@@ -228,7 +228,7 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
security_d_instantiate(ret, inode);
if (ret->d_op == NULL)
- ret->d_op = server->nfs_client->rpc_ops->dentry_ops;
+ d_set_d_op(ret, server->nfs_client->rpc_ops->dentry_ops);
out:
nfs_free_fattr(fattr);
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