Hi Paul,
First bad commit (maybe != root cause):
tree:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: debe436e77c72fcee804fb867f275e6d31aa999c
commit: 53d143fe08c24c2ce44ee329e41c2a6aad57ebb5 powerpc: Add Microwatt platform
date: 5 months ago
config: powerpc64-buildonly-randconfig-r002-20210929 (attached as .config)
compiler: powerpc64le-linux-gcc (GCC) 11.2.0
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/torvalds/linux.git/commit...
git remote add linus
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 53d143fe08c24c2ce44ee329e41c2a6aad57ebb5
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
arch/powerpc/mm/book3s64/hash_native.c: In function 'native_flush_hash_range':
> arch/powerpc/mm/book3s64/hash_native.c:832:29: error: variable
'index' set but not used [-Werror=unused-but-set-variable]
832 |
unsigned long hash, index, hidx, shift, slot;
| ^~~~~
cc1: all warnings being treated as errors
vim +/index +832 arch/powerpc/mm/book3s64/hash_native.c
f4c82d5132b059 arch/ppc64/mm/hash_native.c R Sharada 2005-06-25
824
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
825 /*
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
826 * Batched hash table flush, we batch the tlbie's to avoid taking/releasing
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
827 * the lock all the time
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
828 */
61b1a94254a215 arch/ppc64/mm/hash_native.c Benjamin Herrenschmidt 2005-09-20
829 static void native_flush_hash_range(unsigned long number, int local)
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
830 {
a5d4b5891c2f1f arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-03-23
831 unsigned long vpn = 0;
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
@832 unsigned long hash, index, hidx, shift, slot;
8e561e7eda0281 arch/powerpc/mm/hash_native_64.c David Gibson 2007-06-13
833 struct hash_pte *hptep;
96e2844999f998 arch/ppc64/mm/hash_native.c David Gibson 2005-07-13
834 unsigned long hpte_v;
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
835 unsigned long want_v;
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
836 unsigned long flags;
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
837 real_pte_t pte;
69111bac42f5ce arch/powerpc/mm/hash_native_64.c Christoph Lameter 2014-10-21
838 struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch);
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
839 unsigned long psize = batch->psize;
1189be6508d451 arch/powerpc/mm/hash_native_64.c Paul Mackerras 2007-10-11
840 int ssize = batch->ssize;
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
841 int i;
88b1bf7268f568 arch/powerpc/mm/hash_native_64.c Frederic Barrat 2017-03-29
842 unsigned int use_local;
88b1bf7268f568 arch/powerpc/mm/hash_native_64.c Frederic Barrat 2017-03-29
843
88b1bf7268f568 arch/powerpc/mm/hash_native_64.c Frederic Barrat 2017-03-29
844 use_local = local && mmu_has_feature(MMU_FTR_TLBIEL) &&
88b1bf7268f568 arch/powerpc/mm/hash_native_64.c Frederic Barrat 2017-03-29
845 mmu_psize_defs[psize].tlbiel && !cxl_ctx_in_use();
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
846
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
847 local_irq_save(flags);
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
848
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
849 for (i = 0; i < number; i++) {
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
850 vpn = batch->vpn[i];
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
851 pte = batch->pte[i];
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
852
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
853 pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
854 hash = hpt_hash(vpn, shift, ssize);
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
855 hidx = __rpte_to_hidx(pte, index);
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
856 if (hidx & _PTEIDX_SECONDARY)
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
857 hash = ~hash;
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
858 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
859 slot += hidx & _PTEIDX_GROUP_IX;
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
860 hptep = htab_address + slot;
74f227b22897e0 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2013-04-28
861 want_v = hpte_encode_avpn(vpn, psize, ssize);
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
862 hpte_v = hpte_get_old_v(hptep);
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
863
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
864 if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID))
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
865 continue;
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
866 /* lock and try again */
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
867 native_lock_hpte(hptep);
a833280b4aeeb3 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
868 hpte_v = hpte_get_old_v(hptep);
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
869
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
870 if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID))
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
871 native_unlock_hpte(hptep);
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
872 else
96e2844999f998 arch/ppc64/mm/hash_native.c David Gibson 2005-07-13
873 hptep->v = 0;
27d8959da71277 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-06-29
874
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
875 } pte_iterate_hashed_end();
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
876 }
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
877
88b1bf7268f568 arch/powerpc/mm/hash_native_64.c Frederic Barrat 2017-03-29
878 if (use_local) {
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
879 asm volatile("ptesync":::"memory");
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
880 for (i = 0; i < number; i++) {
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
881 vpn = batch->vpn[i];
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
882 pte = batch->pte[i];
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
883
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
884 pte_iterate_hashed_subpages(pte, psize,
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
885 vpn, index, shift) {
b1022fbd293564 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2013-04-28
886 __tlbiel(vpn, psize, psize, ssize);
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
887 } pte_iterate_hashed_end();
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
888 }
05504b42562066 arch/powerpc/mm/book3s64/hash_native.c Nicholas Piggin 2020-09-16
889 ppc_after_tlbiel_barrier();
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
890 } else {
44ae3ab3358e96 arch/powerpc/mm/hash_native_64.c Matt Evans 2011-04-06
891 int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
892
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
893 if (lock_tlbie)
6b9c9b8a66f769 arch/powerpc/mm/hash_native_64.c Thomas Gleixner 2010-02-18
894 raw_spin_lock(&native_tlbie_lock);
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
895
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
896 asm volatile("ptesync":::"memory");
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
897 for (i = 0; i < number; i++) {
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
898 vpn = batch->vpn[i];
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
899 pte = batch->pte[i];
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
900
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
901 pte_iterate_hashed_subpages(pte, psize,
5524a27d39b687 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2012-09-10
902 vpn, index, shift) {
b1022fbd293564 arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2013-04-28
903 __tlbie(vpn, psize, psize, ssize);
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
904 } pte_iterate_hashed_end();
3c726f8dee6f55 arch/powerpc/mm/hash_native_64.c Benjamin Herrenschmidt 2005-11-07
905 }
a5d4b5891c2f1f arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-03-23
906 /*
a5d4b5891c2f1f arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-03-23
907 * Just do one more with the last used values.
a5d4b5891c2f1f arch/powerpc/mm/hash_native_64.c Aneesh Kumar K.V 2018-03-23
908 */
047e6575aec71d arch/powerpc/mm/book3s64/hash_native.c Aneesh Kumar K.V 2019-09-24
909 fixup_tlbie_vpn(vpn, psize, psize, ssize);
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
910 asm volatile("eieio; tlbsync; ptesync":::"memory");
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
911
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
912 if (lock_tlbie)
6b9c9b8a66f769 arch/powerpc/mm/hash_native_64.c Thomas Gleixner 2010-02-18
913 raw_spin_unlock(&native_tlbie_lock);
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
914 }
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
915
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
916 local_irq_restore(flags);
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
917 }
^1da177e4c3f41 arch/ppc64/mm/hash_native.c Linus Torvalds 2005-04-16
918
:::::: The code at line 832 was first introduced by commit
:::::: 5524a27d39b68770f203d8d42eb5a95dde4933bc powerpc/mm: Convert virtual address to
vpn
:::::: TO: Aneesh Kumar K.V <aneesh.kumar(a)linux.vnet.ibm.com>
:::::: CC: Benjamin Herrenschmidt <benh(a)kernel.crashing.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org