From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 22 Mar 2012 22:58:27 +0000 (-0700)
Subject: vfs: tidy up fs/namei.c byte-repeat word constants
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=989412bbd2835f1475d1528846693eddbac744c8;p=mv-sheeva.git

vfs: tidy up fs/namei.c byte-repeat word constants

In commit commit 1de5b41cd3b2 ("fs/namei.c: fix warnings on 32-bit")
Andrew said that there must be a tidier way of doing this.

This is that tidier way.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/namei.c b/fs/namei.c
index bd313d680d3..99a34717b2b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1455,15 +1455,10 @@ done:
 }
 EXPORT_SYMBOL(full_name_hash);
 
-#ifdef CONFIG_64BIT
-#define ONEBYTES	0x0101010101010101ul
-#define SLASHBYTES	0x2f2f2f2f2f2f2f2ful
-#define HIGHBITS	0x8080808080808080ul
-#else
-#define ONEBYTES	0x01010101ul
-#define SLASHBYTES	0x2f2f2f2ful
-#define HIGHBITS	0x80808080ul
-#endif
+#define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))
+#define ONEBYTES	REPEAT_BYTE(0x01)
+#define SLASHBYTES	REPEAT_BYTE('/')
+#define HIGHBITS	REPEAT_BYTE(0x80)
 
 /* Return the high bit set in the first byte that is a zero */
 static inline unsigned long has_zero(unsigned long a)