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| author |   Jeff Layton <jlayton@kernel.org> | 2024-11-13 09:17:51 -0500 |
|---|---|---|
| committer |   Christian Brauner <brauner@kernel.org> | 2024-11-14 10:45:53 +0100 |
| commit | 9fed2c0f2f0771b990d068ef0a2b32e770ae6d48 (patch) | |
| tree | f7efaa0568afb1238d72f1e6f024cc30c344cc3d | |
| parent | Merge patch series "timekeeping/fs: multigrain timestamp redux" (diff) | |
| download | wireguard-linux-9fed2c0f2f0771b990d068ef0a2b32e770ae6d48.tar.xz wireguard-linux-9fed2c0f2f0771b990d068ef0a2b32e770ae6d48.zip | |
fs: reduce pointer chasing in is_mgtime() test
The is_mgtime test checks whether the FS_MGTIME flag is set in the
fstype. To get there from the inode though, we have to dereference 3
pointers.
Add a new IOP_MGTIME flag, and have inode_init_always() set that flag
when the fstype flag is set. Then, make is_mgtime test for IOP_MGTIME
instead.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20241113-mgtime-v1-1-84e256980e11@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | fs/inode.c | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/fs/inode.c b/fs/inode.c index 3b66082afe22..bb0117e679de 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -241,6 +241,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_opflags = 0; if (sb->s_xattr) inode->i_opflags |= IOP_XATTR; + if (sb->s_type->fs_flags & FS_MGTIME) + inode->i_opflags |= IOP_MGTIME; i_uid_write(inode, 0); i_gid_write(inode, 0); atomic_set(&inode->i_writecount, 0); diff --git a/include/linux/fs.h b/include/linux/fs.h index b1a3bd07711b..a9c6c8cbda50 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -623,6 +623,7 @@ is_uncached_acl(struct posix_acl *acl) #define IOP_NOFOLLOW 0x0004 #define IOP_XATTR 0x0008 #define IOP_DEFAULT_READLINK 0x0010 +#define IOP_MGTIME 0x0020 /* * Keep mostly read-only and often accessed (especially for @@ -2581,7 +2582,7 @@ struct file_system_type { */ static inline bool is_mgtime(const struct inode *inode) { - return inode->i_sb->s_type->fs_flags & FS_MGTIME; + return inode->i_opflags & IOP_MGTIME; } extern struct dentry *mount_bdev(struct file_system_type *fs_type, |