From: kernel test robot <lkp@intel.com>
To: Jonathan Derrick <jonathan.derrick@linux.dev>,
Song Liu <song@kernel.org>,
linux-raid@vger.kernel.org
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Reindl Harald <h.reindl@thelounge.net>, Xiao Ni <xni@redhat.com>,
Christoph Hellwig <hch@lst.de>,
Paul Menzel <pmenzel@molgen.mpg.de>,
Sushma Kalakota <sushma.kalakota@intel.com>,
Jon Derrick <jonathan.derrick@linux.dev>
Subject: Re: [PATCH v4 1/3] md: Move sb writer loop to its own function
Date: Fri, 24 Feb 2023 15:23:36 +0800 [thread overview]
Message-ID: <202302241507.7JQRJLLW-lkp@intel.com> (raw)
In-Reply-To: <20230223195225.534-2-jonathan.derrick@linux.dev>
Hi Jonathan,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on song-md/md-next]
[also build test WARNING on linus/master v6.2 next-20230224]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Jonathan-Derrick/md-Move-sb-writer-loop-to-its-own-function/20230224-035451
base: git://git.kernel.org/pub/scm/linux/kernel/git/song/md.git md-next
patch link: https://lore.kernel.org/r/20230223195225.534-2-jonathan.derrick%40linux.dev
patch subject: [PATCH v4 1/3] md: Move sb writer loop to its own function
config: s390-randconfig-r036-20230223 (https://download.01.org/0day-ci/archive/20230224/202302241507.7JQRJLLW-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/93818e631c76938f9a3ad87d1baf681645d02ba7
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Jonathan-Derrick/md-Move-sb-writer-loop-to-its-own-function/20230224-035451
git checkout 93818e631c76938f9a3ad87d1baf681645d02ba7
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302241507.7JQRJLLW-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/md/md-bitmap.c:31:
In file included from include/trace/events/block.h:8:
In file included from include/linux/blktrace_api.h:5:
In file included from include/linux/blk-mq.h:8:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from drivers/md/md-bitmap.c:31:
In file included from include/trace/events/block.h:8:
In file included from include/linux/blktrace_api.h:5:
In file included from include/linux/blk-mq.h:8:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from drivers/md/md-bitmap.c:31:
In file included from include/trace/events/block.h:8:
In file included from include/linux/blktrace_api.h:5:
In file included from include/linux/blk-mq.h:8:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
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);
~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> drivers/md/md-bitmap.c:273:18: warning: variable 'rdev' is used uninitialized whenever function 'write_sb_page' is called [-Wsometimes-uninitialized]
struct md_rdev *rdev;
~~~~~~~~~~~~~~~~^~~~
drivers/md/md-bitmap.c:278:35: note: uninitialized use occurs here
while ((rdev = next_active_rdev(rdev, mddev)) != NULL) {
^~~~
drivers/md/md-bitmap.c:273:22: note: initialize the variable 'rdev' to silence this warning
struct md_rdev *rdev;
^
= NULL
13 warnings generated.
vim +273 drivers/md/md-bitmap.c
270
271 static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait)
272 {
> 273 struct md_rdev *rdev;
274 struct mddev *mddev = bitmap->mddev;
275 int ret;
276
277 do {
278 while ((rdev = next_active_rdev(rdev, mddev)) != NULL) {
279 ret = __write_sb_page(rdev, bitmap, page);
280 if (ret)
281 return ret;
282 }
283 } while (wait && md_super_wait(mddev) < 0);
284
285 return 0;
286 }
287
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
next prev parent reply other threads:[~2023-02-24 7:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-23 19:52 [PATCH v4 0/3] md/bitmap: Optimal last page size Jonathan Derrick
2023-02-23 19:52 ` [PATCH v4 1/3] md: Move sb writer loop to its own function Jonathan Derrick
2023-02-24 7:23 ` kernel test robot [this message]
2023-02-24 18:27 ` Jonathan Derrick
2023-02-23 19:52 ` [PATCH v4 2/3] md: Fix types in sb writer Jonathan Derrick
2023-02-23 19:52 ` [PATCH v4 3/3] md: Use optimal I/O size for last bitmap page Jonathan Derrick
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