linux-kernel - [PATCH v3 4/4] type switch

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Message-ID: <20250911045557.1552002-5-mjguzik@gmail.com>
Date: Thu, 11 Sep 2025 06:55:57 +0200
From: Mateusz Guzik <mjguzik@...il.com>
To: brauner@...nel.org
Cc: viro@...iv.linux.org.uk,
	jack@...e.cz,
	linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	josef@...icpanda.com,
	kernel-team@...com,
	amir73il@...il.com,
	linux-btrfs@...r.kernel.org,
	linux-ext4@...r.kernel.org,
	linux-xfs@...r.kernel.org,
	ocfs2-devel@...ts.linux.dev,
	Mateusz Guzik <mjguzik@...il.com>
Subject: [PATCH v3 4/4] type switch

---
 include/linux/fs.h | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ed482e5d14a6..fd8e68352fbd 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -782,6 +782,10 @@ enum inode_state_flags_enum {
 #define I_DIRTY (I_DIRTY_INODE | I_DIRTY_PAGES)
 #define I_DIRTY_ALL (I_DIRTY | I_DIRTY_TIME)
 
+struct inode_state_flags {
+	enum inode_state_flags_enum __state;
+};
+
 /*
  * Keep mostly read-only and often accessed (especially for
  * the RCU path lookup and 'stat' data) fields at the beginning
@@ -840,7 +844,7 @@ struct inode {
 #endif
 
 	/* Misc */
-	enum inode_state_flags_enum i_state;
+	struct inode_state_flags i_state;
 	/* 32-bit hole */
 	struct rw_semaphore	i_rwsem;
 
@@ -908,44 +912,44 @@ struct inode {
 static inline enum inode_state_flags_enum inode_state_read(struct inode *inode)
 {
 	lockdep_assert_held(&inode->i_lock);
-	return inode->i_state;
+	return inode->i_state.__state;
 }
 
 static inline enum inode_state_flags_enum inode_state_read_unstable(struct inode *inode)
 {
-	return READ_ONCE(inode->i_state);
+	return READ_ONCE(inode->i_state.__state);
 }
 
 static inline void inode_state_add(struct inode *inode,
 				   enum inode_state_flags_enum newflags)
 {
 	lockdep_assert_held(&inode->i_lock);
-	WRITE_ONCE(inode->i_state, inode->i_state | newflags);
+	WRITE_ONCE(inode->i_state.__state, inode->i_state.__state | newflags);
 }
 
 static inline void inode_state_add_unchecked(struct inode *inode,
 					     enum inode_state_flags_enum newflags)
 {
-	WRITE_ONCE(inode->i_state, inode->i_state | newflags);
+	WRITE_ONCE(inode->i_state.__state, inode->i_state.__state | newflags);
 }
 
 static inline void inode_state_del(struct inode *inode,
 				   enum inode_state_flags_enum rmflags)
 {
 	lockdep_assert_held(&inode->i_lock);
-	WRITE_ONCE(inode->i_state, inode->i_state & ~rmflags);
+	WRITE_ONCE(inode->i_state.__state, inode->i_state.__state & ~rmflags);
 }
 
 static inline void inode_state_del_unchecked(struct inode *inode,
 					     enum inode_state_flags_enum rmflags)
 {
-	WRITE_ONCE(inode->i_state, inode->i_state & ~rmflags);
+	WRITE_ONCE(inode->i_state.__state, inode->i_state.__state & ~rmflags);
 }
 
 static inline void inode_state_set_unchecked(struct inode *inode,
 					     enum inode_state_flags_enum newflags)
 {
-	WRITE_ONCE(inode->i_state, newflags);
+	WRITE_ONCE(inode->i_state.__state, newflags);
 }
 
 static inline void inode_set_cached_link(struct inode *inode, char *link, int linklen)
-- 
2.43.0