fs: factor out common code in fget_light() and fget_raw_light()

Apart from FMODE_PATH check fget_light() and fget_raw_light() are
identical, shift the code into the new helper, __fget_light(fd, mask).
Saves 208 bytes.

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

1 files changed, 9 insertions, 24 deletions

diff --git a/fs/file.c b/fs/file.c
index 4ed58a32575e..50c1208f6450 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -683,21 +683,21 @@ EXPORT_SYMBOL(fget_raw);
  * The fput_needed flag returned by fget_light should be passed to the
  * corresponding fput_light.
  */
-struct file *fget_light(unsigned int fd, int *fput_needed)
+struct file *__fget_light(unsigned int fd, fmode_t mask, int *fput_needed)
 {
-        struct file *file;
         struct files_struct *files = current->files;
+        struct file *file;
 
         *fput_needed = 0;
         if (atomic_read(&files->count) == 1) {
                 file = __fcheck_files(files, fd);
-                if (file && (file->f_mode & FMODE_PATH))
+                if (file && (file->f_mode & mask))
                         file = NULL;
         } else {
                 rcu_read_lock();
                 file = fcheck_files(files, fd);
                 if (file) {
-                        if (!(file->f_mode & FMODE_PATH) &&
+                        if (!(file->f_mode & mask) &&
                             atomic_long_inc_not_zero(&file->f_count))
                                 *fput_needed = 1;
                         else
@@ -709,30 +709,15 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
 
         return file;
 }
+struct file *fget_light(unsigned int fd, int *fput_needed)
+{
+        return __fget_light(fd, FMODE_PATH, fput_needed);
+}
 EXPORT_SYMBOL(fget_light);
 
 struct file *fget_raw_light(unsigned int fd, int *fput_needed)
 {
-        struct file *file;
-        struct files_struct *files = current->files;
-
-        *fput_needed = 0;
-        if (atomic_read(&files->count) == 1) {
-                file = __fcheck_files(files, fd);
-        } else {
-                rcu_read_lock();
-                file = fcheck_files(files, fd);
-                if (file) {
-                        if (atomic_long_inc_not_zero(&file->f_count))
-                                *fput_needed = 1;
-                        else
-                                /* Didn't get the reference, someone's freed */
-                                file = NULL;
-                }
-                rcu_read_unlock();
-        }
-
-        return file;
+        return __fget_light(fd, 0, fput_needed);
 }
 
 void set_close_on_exec(unsigned int fd, int flag)