On Wed, Feb 08, 2017 at 06:00:28PM +0200, Andy Shevchenko wrote:
> On 32-bit x86 platforms we can't do 64-bit divisions:
>
> ERROR: "__udivdi3" [drivers/platform/x86/intel_pmc_ipc.ko] undefined!
>
> Replace plain division by do_div() macro call.
>
> Reported-by: Darren Hart <dvhart@xxxxxxxxxxxxx>
> Cc: Shanth Murthy <shanth.murthy@xxxxxxxxx>
> Cc: Rajneesh Bhardwaj <rajneesh.bhardwaj@xxxxxxxxx>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> drivers/platform/x86/intel_pmc_ipc.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
> index 46202b6e7c87..8ad4d7b43423 100644
> --- a/drivers/platform/x86/intel_pmc_ipc.c
> +++ b/drivers/platform/x86/intel_pmc_ipc.c
> @@ -62,7 +62,12 @@
> #define GCR_TELEM_SHLW_S0IX_OFFSET 0x1080
>
> /* Residency with clock rate at 19.2MHz to usecs */
> -#define S0IX_RESIDENCY_IN_USECS(d, s) (((d) + (s)) * 10 / 192)
> +#define S0IX_RESIDENCY_IN_USECS(d, s) \
> +({ \
> + u64 result = 10ull * ((d) + (s)); \
> + do_div(result, 192); \
> + result; \
> +})
>
Looks good, we verified it. We are planning to squash this one and send V2.
Hope thats fine?
> /*
> * 16-byte buffer for sending data associated with IPC command.
> --
> 2.11.0
>
--
Best Regards,
Rajneesh
