xfs-linux/xfs_bit.h - diff

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version 1.21, 2007/11/02 03:08:06	version 1.22, 2007/12/06 15:08:28
Line 61 static inline int xfs_highbit64(__uint64	Line 61 static inline int xfs_highbit64(__uint64
/* Get low bit set out of 32-bit argument, -1 if none set */	/* Get low bit set out of 32-bit argument, -1 if none set */
static inline int xfs_lowbit32(__uint32_t v)	static inline int xfs_lowbit32(__uint32_t v)
{	{
unsigned long t = v;	__uint32_t t = v;
return (v) ? find_first_bit(&t, 32) : -1;	return (t) ? find_first_bit((unsigned long *)&t, 32) : -1;
}	}

/* Get low bit set out of 64-bit argument, -1 if none set */	/* Get low bit set out of 64-bit argument, -1 if none set */
static inline int xfs_lowbit64(__uint64_t v)	static inline int xfs_lowbit64(__uint64_t v)
{	{
unsigned long t = v;	__uint64_t t = v;
return (v) ? find_first_bit(&t, 64) : -1;	return (t) ? find_first_bit((unsigned long *)&t, 64) : -1;
}	}

/* Return whether bitmap is empty (1 == empty) */	/* Return whether bitmap is empty (1 == empty) */