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From: NeilBrown <neilb@suse.de>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
	Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
	Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 09/11] VFS: re-pack DENTRY_ flags.
Date: Fri, 20 Dec 2024 13:54:27 +1100	[thread overview]
Message-ID: <20241220030830.272429-10-neilb@suse.de> (raw)
In-Reply-To: <20241220030830.272429-1-neilb@suse.de>

Bits 13, 23, 24, and 27 are not used.  Move all those holes to the end.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 include/linux/dcache.h | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index b64c0260e4be..fc7f571bd5bb 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -191,34 +191,34 @@ struct dentry_operations {
 #define DCACHE_NFSFS_RENAMED		BIT(12)
      /* this dentry has been "silly renamed" and has to be deleted on the last
       * dput() */
-#define DCACHE_FSNOTIFY_PARENT_WATCHED	BIT(14)
+#define DCACHE_FSNOTIFY_PARENT_WATCHED	BIT(13)
      /* Parent inode is watched by some fsnotify listener */
 
-#define DCACHE_DENTRY_KILLED		BIT(15)
+#define DCACHE_DENTRY_KILLED		BIT(14)
 
-#define DCACHE_MOUNTED			BIT(16) /* is a mountpoint */
-#define DCACHE_NEED_AUTOMOUNT		BIT(17) /* handle automount on this dir */
-#define DCACHE_MANAGE_TRANSIT		BIT(18) /* manage transit from this dirent */
+#define DCACHE_MOUNTED			BIT(15) /* is a mountpoint */
+#define DCACHE_NEED_AUTOMOUNT		BIT(16) /* handle automount on this dir */
+#define DCACHE_MANAGE_TRANSIT		BIT(17) /* manage transit from this dirent */
 #define DCACHE_MANAGED_DENTRY \
 	(DCACHE_MOUNTED|DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT)
 
-#define DCACHE_LRU_LIST			BIT(19)
+#define DCACHE_LRU_LIST			BIT(18)
 
-#define DCACHE_ENTRY_TYPE		(7 << 20) /* bits 20..22 are for storing type: */
-#define DCACHE_MISS_TYPE		(0 << 20) /* Negative dentry */
-#define DCACHE_WHITEOUT_TYPE		(1 << 20) /* Whiteout dentry (stop pathwalk) */
-#define DCACHE_DIRECTORY_TYPE		(2 << 20) /* Normal directory */
-#define DCACHE_AUTODIR_TYPE		(3 << 20) /* Lookupless directory (presumed automount) */
-#define DCACHE_REGULAR_TYPE		(4 << 20) /* Regular file type */
-#define DCACHE_SPECIAL_TYPE		(5 << 20) /* Other file type */
-#define DCACHE_SYMLINK_TYPE		(6 << 20) /* Symlink */
+#define DCACHE_ENTRY_TYPE		(7 << 19) /* bits 19..21 are for storing type: */
+#define DCACHE_MISS_TYPE		(0 << 19) /* Negative dentry */
+#define DCACHE_WHITEOUT_TYPE		(1 << 19) /* Whiteout dentry (stop pathwalk) */
+#define DCACHE_DIRECTORY_TYPE		(2 << 19) /* Normal directory */
+#define DCACHE_AUTODIR_TYPE		(3 << 19) /* Lookupless directory (presumed automount) */
+#define DCACHE_REGULAR_TYPE		(4 << 19) /* Regular file type */
+#define DCACHE_SPECIAL_TYPE		(5 << 19) /* Other file type */
+#define DCACHE_SYMLINK_TYPE		(6 << 19) /* Symlink */
 
-#define DCACHE_NOKEY_NAME		BIT(25) /* Encrypted name encoded without key */
-#define DCACHE_OP_REAL			BIT(26)
+#define DCACHE_NOKEY_NAME		BIT(22) /* Encrypted name encoded without key */
+#define DCACHE_OP_REAL			BIT(23)
 
-#define DCACHE_PAR_LOOKUP		BIT(28) /* being looked up (with parent locked shared) */
-#define DCACHE_DENTRY_CURSOR		BIT(29)
-#define DCACHE_NORCU			BIT(30) /* No RCU delay for freeing */
+#define DCACHE_PAR_LOOKUP		BIT(24) /* being looked up (with parent locked shared) */
+#define DCACHE_DENTRY_CURSOR		BIT(25)
+#define DCACHE_NORCU			BIT(26) /* No RCU delay for freeing */
 
 extern seqlock_t rename_lock;
 
-- 
2.47.0


  parent reply	other threads:[~2024-12-20  3:09 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-20  2:54 [PATCH 00/11 RFC] Allow concurrent changes in a directory NeilBrown
2024-12-20  2:54 ` [PATCH 01/11] VFS: introduce vfs_mkdir_return() NeilBrown
2024-12-23  5:04   ` Al Viro
2024-12-23  7:26     ` NeilBrown
2024-12-20  2:54 ` [PATCH 02/11] VFS: add _shared versions of the various directory modifying inode_operations NeilBrown
2024-12-23  5:08   ` Al Viro
2024-12-20  2:54 ` [PATCH 03/11] VFS: use global wait-queue table for d_alloc_parallel() NeilBrown
2024-12-20  2:54 ` [PATCH 04/11] VFS: use d_alloc_parallel() in lookup_one_qstr_excl() NeilBrown
2024-12-20  2:54 ` [PATCH 05/11] VFS: change kern_path_locked() and user_path_locked_at() to never return negative dentry NeilBrown
2024-12-20  2:54 ` [PATCH 06/11] VFS: introduce done_lookup_and_lock() NeilBrown
2024-12-20  2:54 ` [PATCH 07/11] VFS: introduce lookup_and_lock() NeilBrown
2024-12-20  2:54 ` [PATCH 08/11] VFS: add inode_dir_lock/unlock NeilBrown
2024-12-21  1:21   ` Hillf Danton
2024-12-23  3:10     ` NeilBrown
2024-12-23 11:12       ` Hillf Danton
2024-12-23 20:36         ` NeilBrown
2024-12-24 10:26           ` Hillf Danton
2024-12-20  2:54 ` NeilBrown [this message]
2024-12-20  2:54 ` [PATCH 10/11] VFS: take a shared lock for create/remove directory operations NeilBrown
2024-12-23  5:19   ` Al Viro
2024-12-23  7:11     ` NeilBrown
2024-12-23  7:26       ` Al Viro
2024-12-23 20:40         ` NeilBrown
2024-12-20  2:54 ` [PATCH 11/11] nfsd: use lookup_and_lock_one() NeilBrown
2024-12-20 20:55 ` [PATCH 00/11 RFC] Allow concurrent changes in a directory Andreas Dilger
2024-12-23  5:22 ` Al Viro

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