cache the value of file_inode() in struct file
Note that this thing does *not* contribute to inode refcount;
it's pinned down by dentry.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4e686a0..74a907b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -769,6 +769,7 @@
} f_u;
struct path f_path;
#define f_dentry f_path.dentry
+ struct inode *f_inode; /* cached value */
const struct file_operations *f_op;
/*
@@ -2217,7 +2218,7 @@
static inline struct inode *file_inode(struct file *f)
{
- return f->f_path.dentry->d_inode;
+ return f->f_inode;
}
/*