On 7/16/21 8:38 AM, Shyam Sundar S K wrote:
> It was reported that on i386 config
>
> ------
> on i386:
>
> ld: drivers/platform/x86/amd-pmc.o: in function `s0ix_stats_show':
> amd-pmc.c:(.text+0x100): undefined reference to `__udivdi3'
> -------
>
> The reason for this is that 64-bit integer division is not supported
> on 32-bit architecture. Use do_div macro to fix this.
>
> Fixes: b9a4fa6978be ("platform/x86: amd-pmc: Add support for logging s0ix counters")
> Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
Reviewed-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> # and build-tested
Thanks.
> ---
> drivers/platform/x86/amd-pmc.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
> index 680f94c7e075..45ce1d5e1e6d 100644
> --- a/drivers/platform/x86/amd-pmc.c
> +++ b/drivers/platform/x86/amd-pmc.c
> @@ -189,7 +189,8 @@ static int s0ix_stats_show(struct seq_file *s, void *unused)
> exit_time = exit_time << 32 | ioread32(dev->fch_virt_addr + FCH_S0I3_EXIT_TIME_L_OFFSET);
>
> /* It's in 48MHz. We need to convert it */
> - residency = (exit_time - entry_time) / 48;
> + residency = exit_time - entry_time;
> + do_div(residency, 48);
>
> seq_puts(s, "=== S0ix statistics ===\n");
> seq_printf(s, "S0ix Entry Time: %lld\n", entry_time);
>
--
~Randy
