* [chandanr:dio-inode-completion-chain 1/1] fs/xfs/xfs_aops.c:186:8: warning: variable 'nr_entries' set but not used
@ 2023-02-06 8:20 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-02-06 8:20 UTC (permalink / raw)
To: Chandan Babu R; +Cc: llvm, oe-kbuild-all
tree: https://github.com/chandanr/linux dio-inode-completion-chain
head: 5f08e3ed4dcab37394794c13e3b79402ca05f3ca
commit: 5f08e3ed4dcab37394794c13e3b79402ca05f3ca [1/1] changes
config: hexagon-randconfig-r004-20230205 (https://download.01.org/0day-ci/archive/20230206/202302061659.0AclcU4i-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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/chandanr/linux/commit/5f08e3ed4dcab37394794c13e3b79402ca05f3ca
git remote add chandanr https://github.com/chandanr/linux
git fetch --no-tags chandanr dio-inode-completion-chain
git checkout 5f08e3ed4dcab37394794c13e3b79402ca05f3ca
# 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 fs/xfs/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from fs/xfs/xfs_aops.c:7:
In file included from fs/xfs/xfs.h:22:
In file included from fs/xfs/xfs_linux.h:31:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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 fs/xfs/xfs_aops.c:7:
In file included from fs/xfs/xfs.h:22:
In file included from fs/xfs/xfs_linux.h:31:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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 fs/xfs/xfs_aops.c:7:
In file included from fs/xfs/xfs.h:22:
In file included from fs/xfs/xfs_linux.h:31:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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);
~~~~~~~~~~ ^
fs/xfs/xfs_aops.c:177:21: warning: unknown attribute 'optimize' ignored [-Wunknown-attributes]
void __attribute__((optimize("O0")))
^~~~~~~~~~~~~~
>> fs/xfs/xfs_aops.c:186:8: warning: variable 'nr_entries' set but not used [-Wunused-but-set-variable]
int nr_entries = 0;
^
8 warnings generated.
vim +/nr_entries +186 fs/xfs/xfs_aops.c
176
177 void __attribute__((optimize("O0")))
178 xfs_end_dio(
179 struct work_struct *work)
180 {
181 struct xfs_inode *ip =
182 container_of(work, struct xfs_inode, i_dio_work);
183 struct iomap_dio *dio;
184 struct list_head tmp;
185 unsigned long flags;
> 186 int nr_entries = 0;
187
188 spin_lock_irqsave(&ip->i_dio_lock, flags);
189 list_replace_init(&ip->i_dio_list, &tmp);
190 spin_unlock_irqrestore(&ip->i_dio_lock, flags);
191
192 /* chandan: do we have to sort dios? */
193 while ((dio = list_first_entry_or_null(&tmp, struct iomap_dio,
194 dio_list))) {
195 struct kiocb *iocb = dio->iocb;
196
197 ++nr_entries;
198 list_del_init(&dio->dio_list);
199 iocb->ki_complete(iocb, iomap_dio_complete(dio));
200 }
201
202 return;
203 }
204
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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