On Tue, Aug 5, 2008 at 10:23 PM, Austin Zhang
<austin_zhang@xxxxxxxxxxxxxxx> wrote:
> +#ifdef CONFIG_X86_64
> +#define REX_PRE "0x48, "
> +#define SCALE_F 8
> +#else
> +#define REX_PRE
> +#define SCALE_F 4
> +#endif
[...]
> +static u32 __pure crc32c_intel_le_hw(u32 crc, unsigned char const *p, size_t len)
> +{
> + unsigned int iquotient = len / SCALE_F;
> + unsigned int iremainder = len % SCALE_F;
> + unsigned long *ptmp = (unsigned long *)p;
> +
> + while (iquotient--) {
> + __asm__ __volatile__(
> + ".byte 0xf2, " REX_PRE "0xf, 0x38, 0xf1, 0xf1;"
> + :"=S"(crc)
> + :"0"(crc), "c"(*ptmp)
> + );
> + ptmp++;
I think you want to use
#define SCALE_F sizeof(unsigned long)
Since the loop iteration count etc depends on
ptmp++
which depends on the type being unsigned long.
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