[kbuild-all] [intel-lts:5.10/yocto 17552/17586] arch/x86/include/asm/pgtable.h:1323:13: error: invalid output size for constraint '+a'

Tuesday, 16 November 2021

tree:   https://github.com/intel/linux-intel-lts.git 5.10/yocto
head:   2202f30edc3f9f14646647cd48c4bd4bfd12e9b7
commit: a18c5b9b95c27d092a997152c4e640dd6c235b82 [17552/17586] x86/mm: Update
ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to
_PAGE_COW
config: i386-randconfig-a013-20211115 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project
fbe72e41b99dc7994daac300d208a955be3e4a0a)
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://github.com/intel/linux-intel-lts/commit/a18c5b9b95c27d092a997152c...
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts 5.10/yocto
        git checkout a18c5b9b95c27d092a997152c4e640dd6c235b82
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir
ARCH=i386 prepare

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>):

   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
...
> arch/x86/include/asm/pgtable.h:1323:13: error: invalid output
size for constraint '+a'                    } while
(!try_cmpxchg(&ptep->pte, &old_pte.pte, new_pte.pte));
                             ^
   arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:172:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
...
> arch/x86/include/asm/pgtable.h:1323:13: error: invalid output
size for constraint '+a'    arch/x86/include/asm/cmpxchg.h:225:2: note:
expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:184:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
...
> arch/x86/include/asm/pgtable.h:1323:13: error: invalid output
size for constraint '+a'    arch/x86/include/asm/cmpxchg.h:225:2: note:
expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:196:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
...
> arch/x86/include/asm/pgtable.h:1323:13: error: invalid output
size for constraint '+a'    arch/x86/include/asm/cmpxchg.h:225:2: note:
expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:208:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
   arch/x86/include/asm/pgtable.h:1385:13: error: invalid output size for constraint
'+a'
                   } while (!try_cmpxchg((pmdval_t *)pmdp, (pmdval_t *)&old_pmd,
pmd_val(new_pmd)));
                             ^
   arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:172:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
   arch/x86/include/asm/pgtable.h:1385:13: error: invalid output size for constraint
'+a'
   arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:184:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
   arch/x86/include/asm/pgtable.h:1385:13: error: invalid output size for constraint
'+a'
   arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:196:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   In file included from arch/x86/kernel/asm-offsets.c:13:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
   arch/x86/include/asm/pgtable.h:1385:13: error: invalid output size for constraint
'+a'
   arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro 'try_cmpxchg'
           __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
           ^
   arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
           __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
           ^
   arch/x86/include/asm/cmpxchg.h:208:23: note: expanded from macro
'__raw_try_cmpxchg'
                                  [old] "+a" (__old)                       \
                                              ^
   8 errors generated.
   make[2]: *** [scripts/Makefile.build:117: arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1215: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.

vim +1323 arch/x86/include/asm/pgtable.h

  1304	
  1305	#define __HAVE_ARCH_PTEP_SET_WRPROTECT
  1306	static inline void ptep_set_wrprotect(struct mm_struct *mm,
  1307					      unsigned long addr, pte_t *ptep)
  1308	{
  1309		/*
  1310		 * If Shadow Stack is enabled, pte_wrprotect() moves _PAGE_DIRTY
  1311		 * to _PAGE_COW (see comments at pte_wrprotect()).
  1312		 * When a thread reads a RW=1, Dirty=0 PTE and before changing it
  1313		 * to RW=0, Dirty=0, another thread could have written to the page
  1314		 * and the PTE is RW=1, Dirty=1 now.  Use try_cmpxchg() to detect
  1315		 * PTE changes and update old_pte, then try again.
  1316		 */
  1317		if (cpu_feature_enabled(X86_FEATURE_SHSTK)) {
  1318			pte_t old_pte, new_pte;
  1319	
  1320			old_pte = READ_ONCE(*ptep);
  1321			do {
  1322				new_pte = pte_wrprotect(old_pte);
...
 1323			} while (!try_cmpxchg(&ptep->pte, &old_pte.pte,
new_pte.pte));   1324	
  1325			return;
  1326		}
  1327		clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
  1328	}
  1329	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

2022

2021

2020

2019

[kbuild-all] [intel-lts:5.10/yocto 17552/17586] arch/x86/include/asm/pgtable.h:1323:13: error: invalid output size for constraint '+a'