On 6/12/21 7:47 PM, kernel test robot wrote:
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 25fe90f43fa312213b653dc1f12fd2d80f855883
commit: 456bb0b97f00fe8defba155c0a4c48d951635395 [8472/9209] iommu/vt-d: Expose latency monitor data through debugfs
config: x86_64-randconfig-a006-20210612 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d2012d965d60c3258b3a69d024491698f8aec386)
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 x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=456bb0b97f00fe8defba155c0a4c48d951635395
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout 456bb0b97f00fe8defba155c0a4c48d951635395
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
drivers/iommu/intel/perf.c:16: warning: Function parameter or member 'latency_lock' not described in 'DEFINE_SPINLOCK'
drivers/iommu/intel/perf.c:16: warning: expecting prototype for perf.c(). Prototype was for DEFINE_SPINLOCK() instead
This seems to be a kernel doc warning and should be fixed in the header
file for DEFINE_SPINLOCK. Did I miss anything?
DEFINE_SPINLOCK is used everywhere, perhaps we need to add some comments
around it?
Best regards,
baolu
vim +16 drivers/iommu/intel/perf.c
55ee5e67a59a1b Lu Baolu 2021-06-10 15
55ee5e67a59a1b Lu Baolu 2021-06-10 @16 static DEFINE_SPINLOCK(latency_lock);
55ee5e67a59a1b Lu Baolu 2021-06-10 17
:::::: The code at line 16 was first introduced by commit
:::::: 55ee5e67a59a1b6f388d7a1c7b24022145f47a3e iommu/vt-d: Add common code for dmar latency performance monitors
:::::: TO: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
:::::: CC: Joerg Roedel <jroedel@xxxxxxx>
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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
