proc: make struct struct map_files_info::len unsigned int

Linux doesn't support 4GB+ filenames in /proc, so unsigned long is too
much.

MOV r64, r/m64 is larger than MOV r32, r/m32.

Link: http://lkml.kernel.org/r/20161029161123.GG1246@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/base.c b/fs/proc/base.c
index e1227bc..7c84302 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1967,7 +1967,7 @@ out:
 
 struct map_files_info {
        fmode_t         mode;
-       unsigned long   len;
+       unsigned int    len;
        unsigned char   name[4*sizeof(long)+2]; /* max: %lx-%lx\0 */
 };