tree: https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git
for-next
head: a20050c14edf19add5a9588cb196bb00aa410650
commit: 165d142ffacdef3e620819a1031df3d896aa29ab [9/11] gfs2: Fix
should_fault_in_pages() logic
config: sh-randconfig-s032-20220313
(https://download.01.org/0day-ci/archive/20220317/202203170954.vflmctje-...@intel.com/config
)
compiler: sh4-linux-gcc (GCC) 11.2.0
reproduce:
wget
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
#
https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git/commit/?id=165d142ffacdef3e620819a1031df3d896aa29ab
git remote add gfs2
https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git
git fetch --no-tags gfs2 for-next
git checkout 165d142ffacdef3e620819a1031df3d896aa29ab
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sh SHELL=/bin/bash
fs/gfs2/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>
sparse warnings: (new ones prefixed by >>)
fs/gfs2/file.c:796:24: sparse: sparse: incompatible types in comparison
expression (different signedness):
>> fs/gfs2/file.c:796:24: sparse: unsigned int *
fs/gfs2/file.c:796:24: sparse: int *
>> fs/gfs2/file.c:796:24: sparse: sparse: cannot size expression
vim +796 fs/gfs2/file.c
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 773 static
inline bool should_fault_in_pages(ssize_t ret, struct iov_iter *i,
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 774
size_t *prev_count,
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 775
size_t *window_size)
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 776 {
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 777 size_t
count = iov_iter_count(i);
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 778 size_t
size, offs;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 779
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 780 if
(likely(!count))
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 781
return false;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 782 if (ret
<= 0 && ret != -EFAULT)
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 783
return false;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 784 if
(!iter_is_iovec(i))
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 785
return false;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 786
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 787 size =
PAGE_SIZE;
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 788 offs =
offset_in_page(i->iov[0].iov_base + i->iov_offset);
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 789 if
(*prev_count != count || !*window_size) {
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 790
int nr_dirtied;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 791
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 792
size = ALIGN(offs + count, PAGE_SIZE);
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 793
size = min_t(size_t, size, SZ_1M);
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 794
nr_dirtied = max(current->nr_dirtied_pause -
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 795
current->nr_dirtied, 8);
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 @796
size = min(size, nr_dirtied << PAGE_SHIFT);
size is size_t so nr_dirtied needs to be size_t as well. I'm surprised
this compiles. The min()/max() macros are supposed to trigger a compile
error for type mismatches.
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 797 }
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 798
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 799
*prev_count = count;
165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 800
*window_size = size - offs;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 801 return
true;
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 802 }
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