linux-kernel - Re: [PATCH v3 04/13] mm/slab: Allow kmalloc() minimum alignment fallback to dma_get_cache

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Date:   Mon, 7 Nov 2022 09:22:33 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     kernel test robot <lkp@...el.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>, Christoph Hellwig <hch@....de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        oe-kbuild-all@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Ard Biesheuvel <ardb@...nel.org>,
        Isaac Manjarres <isaacmanjarres@...gle.com>,
        Saravana Kannan <saravanak@...gle.com>,
        Alasdair Kergon <agk@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Joerg Roedel <joro@...tes.org>,
        Mark Brown <broonie@...nel.org>,
        Mike Snitzer <snitzer@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Robin Murphy <robin.murphy@....com>, iommu@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 04/13] mm/slab: Allow kmalloc() minimum alignment
 fallback to dma_get_cache_alignment()

On Mon, Nov 07, 2022 at 08:50:31AM +0800, kernel test robot wrote:
> url:    https://github.com/intel-lab-lkp/linux/commits/Catalin-Marinas/mm-dma-arm64-Reduce-ARCH_KMALLOC_MINALIGN-to-8/20221107-060303
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/20221106220143.2129263-5-catalin.marinas%40arm.com
> patch subject: [PATCH v3 04/13] mm/slab: Allow kmalloc() minimum alignment fallback to dma_get_cache_alignment()
> config: parisc-randconfig-r003-20221106
> compiler: hppa-linux-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/intel-lab-lkp/linux/commit/309bc52a1ed9665a1b9d32bcf094918ceb6af519
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Catalin-Marinas/mm-dma-arm64-Reduce-ARCH_KMALLOC_MINALIGN-to-8/20221107-060303
>         git checkout 309bc52a1ed9665a1b9d32bcf094918ceb6af519
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    mm/slab_common.c: In function '__kmalloc_minalign':
> >> mm/slab_common.c:866:52: error: 'io_tlb_default_mem' undeclared (first use in this function)
>      866 |             cache_align < ARCH_KMALLOC_MINALIGN || io_tlb_default_mem.nslabs)
>          |                                                    ^~~~~~~~~~~~~~~~~~
>    mm/slab_common.c:866:52: note: each undeclared identifier is reported only once for each function it appears in

Thanks for this. It looks like I didn't test the series with
CONFIG_SWIOTLB disabled.

-- 
Catalin