Hi Will,
On 11/27/20 5:04 AM, Will Deacon wrote:
On Fri, Nov 27, 2020 at 03:42:40AM +0800, kernel test robot wrote:
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 6147c83fd749d19a0d3ccc2f64d12138ab010b47
commit: 2a2b8eaa5b25668a6f717f94b55f4e3aaf87629d [8183/8750] iommu: Handle freelists when using deferred flushing in iommu drivers
config: ia64-randconfig-r004-20201127 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=2a2b8eaa5b25668a6f717f94b55f4e3aaf87629d
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 2a2b8eaa5b25668a6f717f94b55f4e3aaf87629d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64
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/iommu.c: In function 'intel_iommu_tlb_sync':
drivers/iommu/intel/iommu.c:5643:27: warning: variable 'last_pfn' set but not used [-Wunused-but-set-variable]
5643 | unsigned long start_pfn, last_pfn;
| ^~~~~~~~
Looks like we can just drop the 'last_pfn' variable altogether, since
iommu_flush_iotlb_psi() takes start and size, rather than start and end.
Baolu -- please can you send a patch on top of for-next/iommu/vt-d?
Sure!
Best regards,
baolu
