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| author |   Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:55 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:28 +1100 |
| commit | fb045adb99d9b7c562dc7fef834857f78249daa1 (patch) | |
| tree | 1fd6a4024fffeec568abe100d730589bfdb81c38 /drivers/staging | |
| parent | fs: dcache remove d_mounted (diff) | |
| download | linux-dev-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.xz linux-dev-fb045adb99d9b7c562dc7fef834857f78249daa1.zip | |
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 'drivers/staging')
| -rw-r--r-- | drivers/staging/autofs/root.c | 2 | ||||
| -rw-r--r-- | drivers/staging/smbfs/dir.c | 8 |
2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/staging/autofs/root.c b/drivers/staging/autofs/root.c index 0fdec4befd84..b09adb57971f 100644 --- a/drivers/staging/autofs/root.c +++ b/drivers/staging/autofs/root.c @@ -237,7 +237,7 @@ static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentr * * We need to do this before we release the directory semaphore. */ - dentry->d_op = &autofs_dentry_operations; + d_set_d_op(dentry, &autofs_dentry_operations); dentry->d_flags |= DCACHE_AUTOFS_PENDING; d_add(dentry, NULL); diff --git a/drivers/staging/smbfs/dir.c b/drivers/staging/smbfs/dir.c index 5f79799d5d4a..78f09412740c 100644 --- a/drivers/staging/smbfs/dir.c +++ b/drivers/staging/smbfs/dir.c @@ -398,9 +398,9 @@ smb_new_dentry(struct dentry *dentry) struct smb_sb_info *server = server_from_dentry(dentry); if (server->mnt->flags & SMB_MOUNT_CASE) - dentry->d_op = &smbfs_dentry_operations_case; + d_set_d_op(dentry, &smbfs_dentry_operations_case); else - dentry->d_op = &smbfs_dentry_operations; + d_set_d_op(dentry, &smbfs_dentry_operations); dentry->d_time = jiffies; } @@ -462,9 +462,9 @@ smb_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) add_entry: server = server_from_dentry(dentry); if (server->mnt->flags & SMB_MOUNT_CASE) - dentry->d_op = &smbfs_dentry_operations_case; + d_set_d_op(dentry, &smbfs_dentry_operations_case); else - dentry->d_op = &smbfs_dentry_operations; + d_set_d_op(dentry, &smbfs_dentry_operations); d_add(dentry, inode); smb_renew_times(dentry); |