CC: [email protected]
CC: [email protected]
TO: Xie Yongji <[email protected]>
CC: "Michael S. Tsirkin" <[email protected]>

Hi Xie,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   c8c109546a19613d323a319d0c921cb1f317e629
commit: c8a6153b6c59d95c0e091f053f6f180952ade91e vduse: Introduce VDUSE - vDPA 
Device in Userspace
date:   10 weeks ago
:::::: branch date: 8 hours ago
:::::: commit date: 10 weeks ago
config: powerpc-randconfig-m031-20211016 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
Reported-by: Dan Carpenter <[email protected]>

smatch warnings:
drivers/vdpa/vdpa_user/iova_domain.c:305 vduse_domain_alloc_iova() warn: should 
'iova_pfn << shift' be a 64 bit type?

vim +305 drivers/vdpa/vdpa_user/iova_domain.c

8c773d53fb7b64 Xie Yongji 2021-08-31  286  
8c773d53fb7b64 Xie Yongji 2021-08-31  287  static dma_addr_t
8c773d53fb7b64 Xie Yongji 2021-08-31  288  vduse_domain_alloc_iova(struct 
iova_domain *iovad,
8c773d53fb7b64 Xie Yongji 2021-08-31  289                       unsigned long 
size, unsigned long limit)
8c773d53fb7b64 Xie Yongji 2021-08-31  290  {
8c773d53fb7b64 Xie Yongji 2021-08-31  291       unsigned long shift = 
iova_shift(iovad);
8c773d53fb7b64 Xie Yongji 2021-08-31  292       unsigned long iova_len = 
iova_align(iovad, size) >> shift;
8c773d53fb7b64 Xie Yongji 2021-08-31  293       unsigned long iova_pfn;
8c773d53fb7b64 Xie Yongji 2021-08-31  294  
8c773d53fb7b64 Xie Yongji 2021-08-31  295       /*
8c773d53fb7b64 Xie Yongji 2021-08-31  296        * Freeing 
non-power-of-two-sized allocations back into the IOVA caches
8c773d53fb7b64 Xie Yongji 2021-08-31  297        * will come back to bite us 
badly, so we have to waste a bit of space
8c773d53fb7b64 Xie Yongji 2021-08-31  298        * rounding up anything 
cacheable to make sure that can't happen. The
8c773d53fb7b64 Xie Yongji 2021-08-31  299        * order of the unadjusted size 
will still match upon freeing.
8c773d53fb7b64 Xie Yongji 2021-08-31  300        */
8c773d53fb7b64 Xie Yongji 2021-08-31  301       if (iova_len < (1 << 
(IOVA_RANGE_CACHE_MAX_SIZE - 1)))
8c773d53fb7b64 Xie Yongji 2021-08-31  302               iova_len = 
roundup_pow_of_two(iova_len);
8c773d53fb7b64 Xie Yongji 2021-08-31  303       iova_pfn = 
alloc_iova_fast(iovad, iova_len, limit >> shift, true);
8c773d53fb7b64 Xie Yongji 2021-08-31  304  
8c773d53fb7b64 Xie Yongji 2021-08-31 @305       return iova_pfn << shift;
8c773d53fb7b64 Xie Yongji 2021-08-31  306  }
8c773d53fb7b64 Xie Yongji 2021-08-31  307  

:::::: The code at line 305 was first introduced by commit
:::::: 8c773d53fb7b64267b0f55c1d3517cb8c5e29b3c vduse: Implement an MMU-based 
software IOTLB

:::::: TO: Xie Yongji <[email protected]>
:::::: CC: Michael S. Tsirkin <[email protected]>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

Attachment: .config.gz
Description: application/gzip

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