Commit 989412bb authored by Linus Torvalds's avatar Linus Torvalds
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vfs: tidy up fs/namei.c byte-repeat word constants 



In commit commit 1de5b41c ("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: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 1f1e6e52

fs/namei.c

+4 −9
Original line number Diff line number Diff line
@@ -1455,15 +1455,10 @@ unsigned int full_name_hash(const unsigned char *name, unsigned int len) 
}

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)