simple_open: automatically convert to simple_open()

Many users of debugfs copy the implementation of default_open() when
they want to support a custom read/write function op.  This leads to a
proliferation of the default_open() implementation across the entire
tree.

Now that the common implementation has been consolidated into libfs we
can replace all the users of this function with simple_open().

This replacement was done with the following semantic patch:

<smpl>
@ open @
identifier open_f != simple_open;
identifier i, f;
@@
-int open_f(struct inode *i, struct file *f)
-{
(
-if (i->i_private)
-f->private_data = i->i_private;
|
-f->private_data = i->i_private;
)
-return 0;
-}

@ has_open depends on open @
identifier fops;
identifier open.open_f;
@@
struct file_operations fops = {
...
-.open = open_f,
+.open = simple_open,
...
};
</smpl>

[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 16 deletions

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index cdea7b56b0c9..c0bd0308741c 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -311,13 +311,6 @@ int blk_trace_remove(struct request_queue *q)
 }
 EXPORT_SYMBOL_GPL(blk_trace_remove);
 
-static int blk_dropped_open(struct inode *inode, struct file *filp)
-{
-        filp->private_data = inode->i_private;
-
-        return 0;
-}
-
 static ssize_t blk_dropped_read(struct file *filp, char __user *buffer,
                                 size_t count, loff_t *ppos)
 {
@@ -331,18 +324,11 @@ static ssize_t blk_dropped_read(struct file *filp, char __user *buffer,
 
 static const struct file_operations blk_dropped_fops = {
         .owner =        THIS_MODULE,
-        .open =         blk_dropped_open,
+        .open =         simple_open,
         .read =         blk_dropped_read,
         .llseek =       default_llseek,
 };
 
-static int blk_msg_open(struct inode *inode, struct file *filp)
-{
-        filp->private_data = inode->i_private;
-
-        return 0;
-}
-
 static ssize_t blk_msg_write(struct file *filp, const char __user *buffer,
                                 size_t count, loff_t *ppos)
 {
@@ -371,7 +357,7 @@ static ssize_t blk_msg_write(struct file *filp, const char __user *buffer,
 
 static const struct file_operations blk_msg_fops = {
         .owner =        THIS_MODULE,
-        .open =         blk_msg_open,
+        .open =         simple_open,
         .write =        blk_msg_write,
         .llseek =       noop_llseek,
 };