Hi Jose,
On Wed, Jun 27, 2018 at 4:44 PM Jose Abreu <jose.ab...@synopsys.com> wrote:
> On 27-06-2018 15:36, Geert Uytterhoeven wrote:
> > On Wed, Jun 27, 2018 at 4:32 PM Jose Abreu <jose.ab...@synopsys.com> wrote:
> >> ++ SH Maintainers
> >> ++ SH ML
> >>
> >> Hi SH Maintainers,
> >>
> >> On 27-06-2018 15:15, kbuild test robot wrote:
> >>> Hi Jose,
> >>>
> >>> I love your patch! Perhaps something to improve:
> >>>
> >>> [auto build test WARNING on net-next/master]
> >>>
> >>> url:
> >>> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_0day-2Dci_linux_commits_Jose-2DAbreu_net-2Dstmmac-2DAdd-2Dsupport-2Dfor-2DCBS-2DQDISC_20180627-2D214704&d=DwIBAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=WHDsc6kcWAl4i96Vm5hJ_19IJiuxx_p_Rzo2g-uHDKw&m=YIae3rrFzqYg_5b4eVIAXuyvT_EV0vKACS25rJugux8&s=qW5_vbinGt0OnyDfQ2wtKdb2ZGzCcLwq6Fmlaki61xw&e=
> >>> config: sh-allyesconfig (attached as .config)
> >>> compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> >>> reproduce:
> >>> wget
> >>> https://urldefense.proofpoint.com/v2/url?u=https-3A__raw.githubusercontent.com_intel_lkp-2Dtests_master_sbin_make.cross&d=DwIBAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=WHDsc6kcWAl4i96Vm5hJ_19IJiuxx_p_Rzo2g-uHDKw&m=YIae3rrFzqYg_5b4eVIAXuyvT_EV0vKACS25rJugux8&s=4nNar4fgVZq0LjrPKIZP30nxVUY4yeu5QeyKbmlsu8A&e=
> >>> -O ~/bin/make.cross
> >>> chmod +x ~/bin/make.cross
> >>> # save the attached .config to linux build tree
> >>> GCC_VERSION=7.2.0 make.cross ARCH=sh
> >>>
> >>> All warnings (new ones prefixed by >>):
> >>>
> >>> In file included from ./arch/sh/include/generated/asm/div64.h:1:0,
> >>> from include/linux/kernel.h:174,
> >>> from include/linux/list.h:9,
> >>> from include/linux/timer.h:5,
> >>> from include/linux/workqueue.h:9,
> >>> from include/net/pkt_cls.h:6,
> >>> from
> >>> drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c:7:
> >>> drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c: In function
> >>> 'tc_setup_cbs':
> >>> include/asm-generic/div64.h:222:28: warning: comparison of distinct
> >>> pointer types lacks a cast
> >>> (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
> >>> ^
> >>>>> drivers/net//ethernet/stmicro/stmmac/stmmac_tc.c:325:2: note: in
> >>>>> expansion of macro 'do_div'
> >>> do_div(value, speed_div);
> >>> ^~~~~~
> >>> include/asm-generic/div64.h:222:28: warning: comparison of distinct
> >>> pointer types lacks a cast
> >>> (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
> >> I'm not seeing the reason for this warning as I'm using a 64 bit
> >> var. I guess the warning is appearing only because its signed
> >> [see source bellow]. Is this not supported?
> > No, the first parameter of do_div() must be u64, hence the check to
> > enforce that.
>
> Hmm ok. I guess I can use two variables then because the only
> case value will be negative is with locredit and this does not
> need the do_div.
You can use div_s64_rem() or div_s64() (in include/linux/math64.h).
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
