fs: factor out common code in fget() and fget_raw()

Apart from FMODE_PATH check fget() and fget_raw() are identical,
shift the code into the new simple helper, __fget(fd, mask). Saves
160 bytes.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/file.c b/fs/file.c
index d34e59e..4ed58a3 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -637,16 +637,16 @@ void do_close_on_exec(struct files_struct *files)
        spin_unlock(&files->file_lock);
 }
 
-struct file *fget(unsigned int fd)
+static struct file *__fget(unsigned int fd, fmode_t mask)
 {
-       struct file *file;
        struct files_struct *files = current->files;
+       struct file *file;
 
        rcu_read_lock();
        file = fcheck_files(files, fd);
        if (file) {
                /* File object ref couldn't be taken */
-               if (file->f_mode & FMODE_PATH ||
+               if ((file->f_mode & mask) ||
                    !atomic_long_inc_not_zero(&file->f_count))
                        file = NULL;
        }
@@ -655,25 +655,16 @@ struct file *fget(unsigned int fd)
        return file;
 }
 
+struct file *fget(unsigned int fd)
+{
+       return __fget(fd, FMODE_PATH);
+}
 EXPORT_SYMBOL(fget);
 
 struct file *fget_raw(unsigned int fd)
 {
-       struct file *file;
-       struct files_struct *files = current->files;
-
-       rcu_read_lock();
-       file = fcheck_files(files, fd);
-       if (file) {
-               /* File object ref couldn't be taken */
-               if (!atomic_long_inc_not_zero(&file->f_count))
-                       file = NULL;
-       }
-       rcu_read_unlock();
-
-       return file;
+       return __fget(fd, 0);
 }
-
 EXPORT_SYMBOL(fget_raw);
 
 /*