On Wed, May 04, 2022 at 11:57:29AM +0200, Jason A. Donenfeld wrote:
> On Wed, May 04, 2022 at 11:42:27AM +0200, Jason A. Donenfeld wrote:
> > So more likely is that this patch just helps unmask a real issue
> > elsewhere -- linker, compiler, or register restoration after preemption.
> > I don't think there's anything to do with regards to the patch of this
> > thread, as it's clearly fine.
>
> The problem even goes away if I just add a nop...
Alignment? Compiler bug? HW issue?
> diff --git a/lib/hexdump.c b/lib/hexdump.c
> index 06833d404398..ace74f9b3d5a 100644
> --- a/lib/hexdump.c
> +++ b/lib/hexdump.c
> @@ -46,6 +46,7 @@ EXPORT_SYMBOL(hex_asc_upper);
> int hex_to_bin(unsigned char ch)
> {
> unsigned char cu = ch & 0xdf;
> + __asm__("l.nop 0");
> return -1 +
> ((ch - '0' + 1) & (unsigned)((ch - '9' - 1) & ('0' - 1 - ch))
> >> 8) +
> ((cu - 'A' + 11) & (unsigned)((cu - 'F' - 1) & ('A' - 1 - cu))
> >> 8);
>
--
With Best Regards,
Andy Shevchenko
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