Hi Bartosz, [auto build test WARNING on linus/master] [also build test WARNING on v4.12-rc3 next-20170601] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Bartosz-Golaszewski/irq-generic-chip-resource-management-improvements/20170601-055423 config: x86_64-randconfig-n0-06011738 (attached as .config) compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): In file included from include/linux/kasan.h:16:0, from include/linux/slab.h:120, from include/linux/irq.h:25, from arch/x86/include/asm/hardirq.h:5, from include/linux/hardirq.h:8, from include/linux/interrupt.h:12, from arch/x86/include/asm/mshyperv.h:5, from arch/x86/entry/vdso/vdso32/../vclock_gettime.c:20, from arch/x86/entry/vdso/vdso32/vclock_gettime.c:32: arch/x86/include/asm/pgtable.h: In function 'pte_flags_pkey': >> arch/x86/include/asm/pgtable.h:1182:2: warning: left shift count >= width of type [enabled by default] return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0; ^ >> arch/x86/include/asm/pgtable.h:1182:2: warning: left shift count >= width of type [enabled by default] >> arch/x86/include/asm/pgtable.h:1182:2: warning: left shift count >= width of type [enabled by default] >> arch/x86/include/asm/pgtable.h:1182:2: warning: left shift count >= width of type [enabled by default] arch/x86/include/asm/pgtable.h:1182:2: warning: right shift count >= width of type [enabled by default] vim +1182 arch/x86/include/asm/pgtable.h 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1166 } 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1167 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1168 static inline bool __pkru_allows_write(u32 pkru, u16 pkey) 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1169 { 845942969 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1170 int pkru_pkey_bits = pkey * PKRU_BITS_PER_PKEY; 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1171 /* 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1172 * Access-disable disables writes too so we need to check 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1173 * both bits here. 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1174 */ 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1175 return !(pkru & ((PKRU_AD_BIT|PKRU_WD_BIT) << pkru_pkey_bits)); 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1176 } 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1177 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1178 static inline u16 pte_flags_pkey(unsigned long pte_flags) 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1179 { 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1180 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1181 /* ifdef to avoid doing 59-bit shift on 32-bit values */ 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 @1182 return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0; 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1183 #else 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1184 return 0; 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1185 #endif 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1186 } 33a709b25 arch/x86/include/asm/pgtable.h Dave Hansen 2016-02-12 1187 195466dc4 include/asm-x86/pgtable.h Jeremy Fitzhardinge 2008-01-30 1188 #include <asm-generic/pgtable.h> 195466dc4 include/asm-x86/pgtable.h Jeremy Fitzhardinge 2008-01-30 1189 #endif /* __ASSEMBLY__ */ 195466dc4 include/asm-x86/pgtable.h Jeremy Fitzhardinge 2008-01-30 1190 :::::: The code at line 1182 was first introduced by commit :::::: 33a709b25a760b91184bb335cf7d7c32b8123013 mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys :::::: TO: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> :::::: CC: Ingo Molnar <mingo@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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