new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 7 insertions, 2 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7617ee04f066..3ab69777b4d8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2217,6 +2217,11 @@ static inline bool execute_ok(struct inode *inode)
         return (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode);
 }
 
+static inline struct inode *file_inode(struct file *f)
+{
+        return f->f_path.dentry->d_inode;
+}
+
 /*
  * get_write_access() gets write permission for a file.
  * put_write_access() releases this write permission.
@@ -2239,7 +2244,7 @@ static inline int get_write_access(struct inode *inode)
 }
 static inline int deny_write_access(struct file *file)
 {
-        struct inode *inode = file->f_path.dentry->d_inode;
+        struct inode *inode = file_inode(file);
         return atomic_dec_unless_positive(&inode->i_writecount) ? 0 : -ETXTBSY;
 }
 static inline void put_write_access(struct inode * inode)
@@ -2249,7 +2254,7 @@ static inline void put_write_access(struct inode * inode)
 static inline void allow_write_access(struct file *file)
 {
         if (file)
-                atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
+                atomic_inc(&file_inode(file)->i_writecount);
 }
 #ifdef CONFIG_IMA
 static inline void i_readcount_dec(struct inode *inode)