linux-kernel - [PATCH] proc: make struct struct map_files

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Message-ID: <20161029161123.GG1246@avx2>
Date:   Sat, 29 Oct 2016 19:11:23 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org, xemul@...allels.com
Subject: [PATCH] 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 smaller than MOV r32, r/m32.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/proc/base.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1967,7 +1967,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
 
 struct map_files_info {
 	fmode_t		mode;
-	unsigned long	len;
+	unsigned int	len;
 	unsigned char	name[4*sizeof(long)+2]; /* max: %lx-%lx\0 */
 };