linux-kernel - Re: [PATCH v2] media: s5p-jpeg: rename JPEG marker constants to prevent build warnings

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Date:   Tue, 7 Sep 2021 08:11:25 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>,
        linux-media@...r.kernel.org,
        Andrzej Pietrasiewicz <andrzejtp2010@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] media: s5p-jpeg: rename JPEG marker constants to
 prevent build warnings

Em Mon,  6 Sep 2021 21:40:22 -0700
Randy Dunlap <rdunlap@...radead.org> escreveu:

> The use of a macro named 'RST' conflicts with one of the same name
> in arch/mips/include/asm/mach-rc32434/rb.h. This causes build
> warnings on some MIPS builds.
> 
> Change the names of the JPEG marker constants to be in their own
> namespace to fix these build warnings and to prevent other similar
> problems in the future.
> 
> Fixes these build warnings:
> 
> In file included from ../drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c:14:
> ../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
>    43 | #define RST                             0xd0
>       | 
> ../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
>    13 | #define RST             (1 << 15)
> 
> In file included from ../drivers/media/platform/s5p-jpeg/jpeg-hw-s5p.c:13:
> ../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
>    43 | #define RST                             0xd0
> ../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
>    13 | #define RST             (1 << 15)
> 
> In file included from ../drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c:12:
> ../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
>    43 | #define RST                             0xd0
> ../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
>    13 | #define RST             (1 << 15)
> 
> In file included from ../drivers/media/platform/s5p-jpeg/jpeg-core.c:31:
> ../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
>    43 | #define RST                             0xd0
> ../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
>    13 | #define RST             (1 << 15)
> 
> Also update the kernel-doc so that the word "marker" is not
> repeated.
> 
> Fixes: bb677f3ac434 ("[media] Exynos4 JPEG codec v4l2 driver")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Reported-by: kernel test robot <lkp@...el.com>
> Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
> Cc: linux-media@...r.kernel.org
> Cc: Andrzej Pietrasiewicz <andrzejtp2010@...il.com>
> Cc: Jacek Anaszewski <jacek.anaszewski@...il.com>
> Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
> Cc: linux-arm-kernel@...ts.infradead.org
> ---
> v2: change all JPEG marker macros to be in their own namespace (as
>     suggested by Mauro)

Applied, thanks!

Regards,
Mauro

Thanks,
Mauro