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Message-ID: <202301121127.Mtglv7bl-lkp@intel.com>
Date: Thu, 12 Jan 2023 11:17:57 +0800
From: kernel test robot <lkp@...el.com>
To: Pasha Tatashin <pasha.tatashin@...een.com>,
akpm@...ux-foundation.org, mhocko@...e.com, vbabka@...e.cz,
david@...hat.com, quic_charante@...cinc.com,
lizhe.67@...edance.com, linux-kernel@...r.kernel.org,
linux-mm@...ck.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH] mm/page_ext: Do not allocate space for page_ext->flags
if not needed
Hi Pasha,
I love your patch! Yet something to improve:
[auto build test ERROR on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Pasha-Tatashin/mm-page_ext-Do-not-allocate-space-for-page_ext-flags-if-not-needed/20230112-055942
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230111215906.2645056-1-pasha.tatashin%40soleen.com
patch subject: [PATCH] mm/page_ext: Do not allocate space for page_ext->flags if not needed
config: hexagon-randconfig-r012-20230110
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 8d9828ef5aa9688500657d36cd2aefbe12bbd162)
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/f195fe7b408dd821eef3d052e8ebd50cccb3df51
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Pasha-Tatashin/mm-page_ext-Do-not-allocate-space-for-page_ext-flags-if-not-needed/20230112-055942
git checkout f195fe7b408dd821eef3d052e8ebd50cccb3df51
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon 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 >>):
In file included from mm/page_owner.c:6:
In file included from include/linux/memblock.h:13:
In file included from arch/hexagon/include/asm/dma.h:9:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from mm/page_owner.c:6:
In file included from include/linux/memblock.h:13:
In file included from arch/hexagon/include/asm/dma.h:9:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from mm/page_owner.c:6:
In file included from include/linux/memblock.h:13:
In file included from arch/hexagon/include/asm/dma.h:9:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
>> mm/page_owner.c:102:3: error: field designator 'using_shared_flags' does not refer to any field in type 'struct page_ext_operations'; did you mean 'using_shared_ext_flags'?
.using_shared_flags = true,
^~~~~~~~~~~~~~~~~~
using_shared_ext_flags
include/linux/page_ext.h:15:7: note: 'using_shared_ext_flags' declared here
bool using_shared_ext_flags;
^
6 warnings and 1 error generated.
vim +102 mm/page_owner.c
97
98 struct page_ext_operations page_owner_ops = {
99 .size = sizeof(struct page_owner),
100 .need = need_page_owner,
101 .init = init_page_owner,
> 102 .using_shared_flags = true,
103 };
104
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
View attachment "config" of type "text/plain" (106005 bytes)
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