tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/pti
head:   0564258fb2cfe6876738665314445bf391f450e2
commit: 64c80759408f1c47d2414bfa79f80a4573a8d68d [8/14] x86/mm: Do not 
auto-massage page protections
config: i386-randconfig-n0-201814 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 64c80759408f1c47d2414bfa79f80a4573a8d68d
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/bug.h:83:0,
                    from include/linux/bug.h:5,
                    from include/linux/debug_locks.h:7,
                    from include/linux/lockdep.h:28,
                    from include/linux/spinlock_types.h:18,
                    from include/linux/mutex.h:16,
                    from include/linux/kernfs.h:13,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/cdev.h:5,
                    from include/drm/drmP.h:36,
                    from drivers/gpu//drm/i915/i915_gem_internal.c:25:
   arch/x86/include/asm/pgtable.h: In function 'check_pgprot':
>> arch/x86/include/asm/pgtable.h:536:5: error: format '%lx' expects argument 
>> of type 'long unsigned int', but argument 2 has type 'pgprotval_t {aka long 
>> long unsigned int}' [-Werror=format=]
        "attempted to set unsupported pgprot: %016lx "
        ^
   include/asm-generic/bug.h:98:50: note: in definition of macro '__WARN_printf'
    #define __WARN_printf(arg...) do { __warn_printk(arg); __WARN(); } while (0)
                                                     ^~~
   include/asm-generic/bug.h:154:3: note: in expansion of macro 'WARN'
      WARN(1, format);    \
      ^~~~
   arch/x86/include/asm/pgtable.h:535:2: note: in expansion of macro 'WARN_ONCE'
     WARN_ONCE(pgprot_val(pgprot) != massaged_val,
     ^~~~~~~~~
   In file included from include/linux/memremap.h:8:0,
                    from include/linux/mm.h:27,
                    from include/linux/scatterlist.h:8,
                    from include/linux/dma-mapping.h:11,
                    from include/drm/drmP.h:37,
                    from drivers/gpu//drm/i915/i915_gem_internal.c:25:
   arch/x86/include/asm/pgtable.h:536:48: note: format string is defined here
        "attempted to set unsupported pgprot: %016lx "
                                              ~~~~~^
                                              %016llx
   In file included from arch/x86/include/asm/bug.h:83:0,
                    from include/linux/bug.h:5,
                    from include/linux/debug_locks.h:7,
                    from include/linux/lockdep.h:28,
                    from include/linux/spinlock_types.h:18,
                    from include/linux/mutex.h:16,
                    from include/linux/kernfs.h:13,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/cdev.h:5,
                    from include/drm/drmP.h:36,
                    from drivers/gpu//drm/i915/i915_gem_internal.c:25:
   arch/x86/include/asm/pgtable.h:536:5: error: format '%lx' expects argument 
of type 'long unsigned int', but argument 3 has type 'pgprotval_t {aka long 
long unsigned int}' [-Werror=format=]
        "attempted to set unsupported pgprot: %016lx "
        ^
   include/asm-generic/bug.h:98:50: note: in definition of macro '__WARN_printf'
    #define __WARN_printf(arg...) do { __warn_printk(arg); __WARN(); } while (0)
                                                     ^~~
   include/asm-generic/bug.h:154:3: note: in expansion of macro 'WARN'
      WARN(1, format);    \
      ^~~~
   arch/x86/include/asm/pgtable.h:535:2: note: in expansion of macro 'WARN_ONCE'
     WARN_ONCE(pgprot_val(pgprot) != massaged_val,
     ^~~~~~~~~
   In file included from include/linux/memremap.h:8:0,
                    from include/linux/mm.h:27,
                    from include/linux/scatterlist.h:8,
                    from include/linux/dma-mapping.h:11,
                    from include/drm/drmP.h:37,
                    from drivers/gpu//drm/i915/i915_gem_internal.c:25:
   arch/x86/include/asm/pgtable.h:537:17: note: format string is defined here
        "bits: %016lx supported: %016lx\n",
               ~~~~~^
               %016llx
   In file included from arch/x86/include/asm/bug.h:83:0,
                    from include/linux/bug.h:5,
                    from include/linux/debug_locks.h:7,
                    from include/linux/lockdep.h:28,
                    from include/linux/spinlock_types.h:18,
                    from include/linux/mutex.h:16,
                    from include/linux/kernfs.h:13,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/cdev.h:5,
                    from include/drm/drmP.h:36,
                    from drivers/gpu//drm/i915/i915_gem_internal.c:25:
>> arch/x86/include/asm/pgtable.h:536:5: error: format '%lx' expects argument 
>> of type 'long unsigned int', but argument 4 has type 'pteval_t {aka long 
>> long unsigned int}' [-Werror=format=]
        "attempted to set unsupported pgprot: %016lx "
        ^
   include/asm-generic/bug.h:98:50: note: in definition of macro '__WARN_printf'
    #define __WARN_printf(arg...) do { __warn_printk(arg); __WARN(); } while (0)
                                                     ^~~
   include/asm-generic/bug.h:154:3: note: in expansion of macro 'WARN'
      WARN(1, format);    \
      ^~~~
   arch/x86/include/asm/pgtable.h:535:2: note: in expansion of macro 'WARN_ONCE'
     WARN_ONCE(pgprot_val(pgprot) != massaged_val,
     ^~~~~~~~~
   In file included from include/linux/memremap.h:8:0,
                    from include/linux/mm.h:27,
                    from include/linux/scatterlist.h:8,
                    from include/linux/dma-mapping.h:11,
                    from include/drm/drmP.h:37,
                    from drivers/gpu//drm/i915/i915_gem_internal.c:25:
   arch/x86/include/asm/pgtable.h:537:35: note: format string is defined here
        "bits: %016lx supported: %016lx\n",
                                 ~~~~~^
                                 %016llx
   cc1: all warnings being treated as errors

vim +536 arch/x86/include/asm/pgtable.h

   528  
   529  static inline pgprotval_t check_pgprot(pgprot_t pgprot)
   530  {
   531          pgprotval_t massaged_val = massage_pgprot(pgprot);
   532  
   533          /* mmdebug.h can not be included here because of dependencies */
   534  #ifdef CONFIG_DEBUG_VM
   535          WARN_ONCE(pgprot_val(pgprot) != massaged_val,
 > 536                    "attempted to set unsupported pgprot: %016lx "
   537                    "bits: %016lx supported: %016lx\n",
   538                    pgprot_val(pgprot),
   539                    pgprot_val(pgprot) ^ massaged_val,
   540                    __supported_pte_mask);
   541  #endif
   542  
   543          return massaged_val;
   544  }
   545  

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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