[U-Boot] [PATCH] arm: exynos: Squash bogus warnings in pinmux

[Lukasz Majewski]

Hi Minkyu,

> On 12/03/14 21:27, Marek Vasut wrote:
> > On Wednesday, March 12, 2014 at 01:21:15 PM, Lukasz Majewski wrote:
> >> Hi Marek,
> >>
> >>> On Wednesday, March 12, 2014 at 08:51:56 AM, Lukasz Majewski
> >>> wrote:
> >>>> Hi Simon, Marek,
> >>>>
> >>>>> Hi Marek,
> >>>>>
> >>>>> On 10 March 2014 13:04, Marek Vasut <marex at denx.de> wrote:
> >>>>>> Squash these warnings in pinmux.c found with GCC 4.8:
> >>>>>>
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c: In function
> >>>>>> 'exynos_pinmux_config': /arch/arm/cpu/armv7/exynos/pinmux.c:687:28:
> >>>>>> warning: 'count' may be used uninitialized in this function
> >>>>>> [-Wmaybe-uninitialized] for (i = start; i < start + count; i++)
> >>>>>> { ^ /arch/arm/cpu/armv7/exynos/pinmux.c:663:16: note: 'count'
> >>>>>> was declared here int i, start, count;
> >>>>>>
> >>>>>>                 ^
> >>>>>>
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c:687:28: warning: 'start'
> >>>>>> may be used uninitialized in this function
> >>>>>> [-Wmaybe-uninitialized] for (i = start; i < start + count; i++)
> >>>>>> { ^ /arch/arm/cpu/armv7/exynos/pinmux.c:663:9: note: 'start'
> >>>>>> was declared here int i, start, count;
> >>>>>>
> >>>>>>          ^
> >>>>>>
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c:689:19: warning: 'bank' may
> >>>>>> be used uninitialized in this function [-Wmaybe-uninitialized]
> >>>>>> s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2)); ^
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c:662:24: note: 'bank' was
> >>>>>> declared here struct s5p_gpio_bank *bank;
> >>>>>>
> >>>>>>                         ^
> >>>>>>
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c: In function
> >>>>>> 'exynos_pinmux_config': /arch/arm/cpu/armv7/exynos/pinmux.c:687:28:
> >>>>>> warning: 'count' may be used uninitialized in this function
> >>>>>> [-Wmaybe-uninitialized] for (i = start; i < start + count; i++)
> >>>>>> { ^ /arch/arm/cpu/armv7/exynos/pinmux.c:663:16: note: 'count'
> >>>>>> was declared here int i, start, count;
> >>>>>>
> >>>>>>                 ^
> >>>>>>
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c:687:28: warning: 'start'
> >>>>>> may be used uninitialized in this function
> >>>>>> [-Wmaybe-uninitialized] for (i = start; i < start + count; i++)
> >>>>>> { ^ /arch/arm/cpu/armv7/exynos/pinmux.c:663:9: note: 'start'
> >>>>>> was declared here int i, start, count;
> >>>>>>
> >>>>>>          ^
> >>>>>>
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c:689:19: warning: 'bank' may
> >>>>>> be used uninitialized in this function [-Wmaybe-uninitialized]
> >>>>>> s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2)); ^
> >>>>>> /arch/arm/cpu/armv7/exynos/pinmux.c:662:24: note: 'bank' was
> >>>>>> declared here struct s5p_gpio_bank *bank;
> >>>>>>
> >>>>>>                         ^
> >>>>>>
> >>>>>> Note that the warning is bogus, the function can never be
> >>>>>> called with invalid 'peripheral' argument. GCC just cannot
> >>>>>> analyze this.
> >>>>>>
> >>>>>> Signed-off-by: Marek Vasut <marex at denx.de>
> >>>>>> Cc: Naveen Krishna Chatradhi <ch.naveen at samsung.com>
> >>>>>> Cc: Akshay Saraswat <akshay.s at samsung.com>
> >>>>>> Cc: Rajeshwari S Shinde <rajeshwari.s at samsung.com>
> >>>>>> Cc: Simon Glass <sjg at chromium.org>
> >>>>>> Cc: Minkyu Kang <mk7.kang at samsung.com>
> >>>>>> Cc: Tom Rini <trini at ti.com>
> >>>>>
> >>>>> Acked-by: Simon Glass <sjg at chromium.org>
> >>>>>
> >>>>> Thanks Marek, great to get that annoyance fixed.
> >>>>
> >>>> Fix for this issue has been already posted :-) (one week ago)
> >>>>
> >>>> http://patchwork.ozlabs.org/patch/327065/
> >>>>
> >>>> But I don't mind if Marek's patch will be applied directly by Tom
> >>>> before v2014.04 is released :-)
> >>>
> >>> Aren't you missing the exynos5_mmc_config() in your patch ?
> >>
> >> Yes, my work miss it. Lets apply your patch and be happy with
> >> "clean" build results from gcc 4.8 :-).
> > 
> > Roger that.
> 
> applied to u-boot-samsung.
> 
> Lukasz,
> your patch will abandon because of this patch.

OK, no problem for me :-)

> 
> Thanks,
> Minkyu Kang.
> 



-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group