mm: do_generic_file_read() never gets a NULL 'filp' argument

The 'filp' argument to do_generic_file_read() is never NULL.

Signed-off-by: Krishna Kumar <[e-mail]>
Reviewed-by: KOSAKI Motohiro <[e-mail]>
Cc: Christoph Hellwig <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/filemap.c

···
 	ra->prev_pos |= prev_offset;
 
 	*ppos = ((loff_t)index << PAGE_CACHE_SHIFT) + offset;
-	if (filp)
-		file_accessed(filp);
+	file_accessed(filp);
 }
 
 int file_read_actor(read_descriptor_t *desc, struct page *page,