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authorAl Viro <viro@zeniv.linux.org.uk>2016-01-22 15:40:57 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-15 08:27:52 +0200
commitd72e9b2566e79f0ca6fe128d8bb6972209a816fc (patch)
tree16638a64e7877bfc8cf8ff1691d6be913a299487 /include
parent09ca40a6afc93c21ec2ecc2ff9ba5b7c7360a0b7 (diff)
wrappers for ->i_mutex access
commit 5955102c9984fa081b2d570cfac75c97eecf8f3b upstream parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested}, inode_foo(inode) being mutex_foo(&inode->i_mutex). Please, use those for access to ->i_mutex; over the coming cycle ->i_mutex will become rwsem, with ->lookup() done with it held only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> [only the fs.h change included to make backports easier - gregkh] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/fs.h29
1 files changed, 27 insertions, 2 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ab3d8d9bb3ef..0166582c4d78 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -710,6 +710,31 @@ enum inode_i_mutex_lock_class
I_MUTEX_PARENT2,
};
+static inline void inode_lock(struct inode *inode)
+{
+ mutex_lock(&inode->i_mutex);
+}
+
+static inline void inode_unlock(struct inode *inode)
+{
+ mutex_unlock(&inode->i_mutex);
+}
+
+static inline int inode_trylock(struct inode *inode)
+{
+ return mutex_trylock(&inode->i_mutex);
+}
+
+static inline int inode_is_locked(struct inode *inode)
+{
+ return mutex_is_locked(&inode->i_mutex);
+}
+
+static inline void inode_lock_nested(struct inode *inode, unsigned subclass)
+{
+ mutex_lock_nested(&inode->i_mutex, subclass);
+}
+
void lock_two_nondirectories(struct inode *, struct inode*);
void unlock_two_nondirectories(struct inode *, struct inode*);
@@ -3029,8 +3054,8 @@ static inline bool dir_emit_dots(struct file *file, struct dir_context *ctx)
}
static inline bool dir_relax(struct inode *inode)
{
- mutex_unlock(&inode->i_mutex);
- mutex_lock(&inode->i_mutex);
+ inode_unlock(inode);
+ inode_lock(inode);
return !IS_DEADDIR(inode);
}