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]
.config.gz
Description: application/gzip
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