From: Fabio Estevam <festevam@gmail.com>
To: Nathan Chancellor <natechancellor@gmail.com>
Cc: Souptick Joarder <jrdr.linux@gmail.com>,
kernel test robot <lkp@intel.com>,
kbuild-all@lists.01.org, clang-built-linux@googlegroups.com,
Linux Memory Management List <linux-mm@kvack.org>,
Vinod Koul <vkoul@kernel.org>
Subject: Re: [linux-next:master 6953/13205] drivers/dma/imx-dma.c:1048:20: warning: cast to smaller integer type 'enum imx_dma_type' from 'const void
Date: Sat, 12 Dec 2020 18:44:55 -0300 [thread overview]
Message-ID: <CAOMZO5AtPkciomabbe01Rg1BvqOzPx_omiytgXgNCQNbZTJ+=g@mail.gmail.com> (raw)
In-Reply-To: <20201212200312.GA1773888@ubuntu-m3-large-x86>
Hi Nathan,
On Sat, Dec 12, 2020 at 5:03 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
> Correct. The clang developers explicitly wanted this behavior so I moved
> it under a new warning that could be disabled on regular builds but show
> up on W=1 in case people wanted to fix these occurrences.
>
> https://reviews.llvm.org/D72231
> https://github.com/ClangBuiltLinux/linux/issues/887
> 82f2bc2fcc01 ("kbuild: Disable -Wpointer-to-enum-cast")
>
> > Not sure how to make clang happy in this case.
Thanks for the clarification.
> Added a cast to unsigned long or uintptr_t before the cast to the enum
> should fix it.
Great, thanks. Maybe someone could send patches fixing these W=1 clang
warnings for the different subsystems.
Regards,
Fabio Estevam
WARNING: multiple messages have this Message-ID (diff)
From: Fabio Estevam <festevam@gmail.com>
To: kbuild-all@lists.01.org
Subject: Re: [linux-next:master 6953/13205] drivers/dma/imx-dma.c:1048:20: warning: cast to smaller integer type 'enum imx_dma_type' from 'const void
Date: Sat, 12 Dec 2020 18:44:55 -0300 [thread overview]
Message-ID: <CAOMZO5AtPkciomabbe01Rg1BvqOzPx_omiytgXgNCQNbZTJ+=g@mail.gmail.com> (raw)
In-Reply-To: <20201212200312.GA1773888@ubuntu-m3-large-x86>
[-- Attachment #1: Type: text/plain, Size: 790 bytes --]
Hi Nathan,
On Sat, Dec 12, 2020 at 5:03 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
> Correct. The clang developers explicitly wanted this behavior so I moved
> it under a new warning that could be disabled on regular builds but show
> up on W=1 in case people wanted to fix these occurrences.
>
> https://reviews.llvm.org/D72231
> https://github.com/ClangBuiltLinux/linux/issues/887
> 82f2bc2fcc01 ("kbuild: Disable -Wpointer-to-enum-cast")
>
> > Not sure how to make clang happy in this case.
Thanks for the clarification.
> Added a cast to unsigned long or uintptr_t before the cast to the enum
> should fix it.
Great, thanks. Maybe someone could send patches fixing these W=1 clang
warnings for the different subsystems.
Regards,
Fabio Estevam
next prev parent reply other threads:[~2020-12-12 21:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-11 13:46 [linux-next:master 6953/13205] drivers/dma/imx-dma.c:1048:20: warning: cast to smaller integer type 'enum imx_dma_type' from 'const void kernel test robot
2020-12-11 13:46 ` kernel test robot
2020-12-11 14:54 ` Souptick Joarder
2020-12-11 14:54 ` Souptick Joarder
2020-12-12 15:40 ` Fabio Estevam
2020-12-12 15:40 ` Fabio Estevam
2020-12-12 20:03 ` Nathan Chancellor
2020-12-12 20:03 ` Nathan Chancellor
2020-12-12 21:44 ` Fabio Estevam [this message]
2020-12-12 21:44 ` Fabio Estevam
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