From: Nathan Chancellor <nathan@kernel.org>
To: Guodong Xu <guodong@riscstar.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Naresh Kamboju <naresh.kamboju@linaro.org>,
clang-built-linux <llvm@lists.linux.dev>,
open list <linux-kernel@vger.kernel.org>,
dmaengine@vger.kernel.org, lkft-triage@lists.linaro.org,
Linux Regressions <regressions@lists.linux.dev>,
Vinod Koul <vkoul@kernel.org>,
Anders Roxell <anders.roxell@linaro.org>,
Dan Carpenter <dan.carpenter@linaro.org>,
Benjamin Copeland <benjamin.copeland@linaro.org>
Subject: Re: next-20250903 x86_64 clang-20 allyesconfig mmp_pdma.c:1188:14: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
Date: Wed, 17 Sep 2025 11:25:12 -0700 [thread overview]
Message-ID: <20250917182512.GA98086@ax162> (raw)
In-Reply-To: <CAH1PCMYWWkThMosDMW=wZZWZ8d_c4_zQWhJOJPKe354LPiV1bA@mail.gmail.com>
Hi Guodong,
On Thu, Sep 04, 2025 at 03:38:21PM +0800, Guodong Xu wrote:
> On Thu, Sep 4, 2025 at 12:59 AM Nathan Chancellor <nathan@kernel.org> wrote:
> >
> > On Wed, Sep 03, 2025 at 02:04:10PM +0200, Arnd Bergmann wrote:
> > > On Wed, Sep 3, 2025, at 12:08, Naresh Kamboju wrote:
> > >
> > > > Build error:
> > > > drivers/dma/mmp_pdma.c:1188:14: error: shift count >= width of type
> > > > [-Werror,-Wshift-count-overflow]
> > > > 1188 | .dma_mask = DMA_BIT_MASK(64), /* force 64-bit DMA
> > > > addr capability */
> > > > | ^~~~~~~~~~~~~~~~
> > > > include/linux/dma-mapping.h:73:54: note: expanded from macro 'DMA_BIT_MASK'
> > > > 73 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
> > > > | ^ ~~~
...
> Thanks, Arnd. I'll send a patch to clean up and simplify the logic.
This error continues to break our -next builds. Have you submitted this
patch yet? I searched lore.kernel.org and I did not find anything but I
wanted to make sure I had not missed anything.
Cheers,
Nathan
next prev parent reply other threads:[~2025-09-17 18:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-03 10:08 next-20250903 x86_64 clang-20 allyesconfig mmp_pdma.c:1188:14: error: shift count >= width of type [-Werror,-Wshift-count-overflow] Naresh Kamboju
2025-09-03 11:29 ` Dan Carpenter
2025-09-03 12:04 ` Arnd Bergmann
2025-09-03 16:59 ` Nathan Chancellor
2025-09-04 7:38 ` Guodong Xu
2025-09-17 18:25 ` Nathan Chancellor [this message]
2025-09-18 14:33 ` Guodong Xu
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