Hi Michael, Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on char-misc/master] url: https://github.com/0day-ci/linux/commits/mikelley-exchange-microsoft-com/Drivers-hv-vmbus-Implement-Direct-Mode-for-stimer0/20171103-214519 config: x86_64-randconfig-h0-11040619 (attached as .config) compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4 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/mshyperv.h:7, 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:1199:2: warning: left shift count >= width of >> type return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0; ^ >> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of >> type >> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of >> type >> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of >> type arch/x86/include/asm/pgtable.h:1199:2: warning: right shift count >= width of type vim +1199 arch/x86/include/asm/pgtable.h 33a709b2 Dave Hansen 2016-02-12 1194 33a709b2 Dave Hansen 2016-02-12 1195 static inline u16 pte_flags_pkey(unsigned long pte_flags) 33a709b2 Dave Hansen 2016-02-12 1196 { 33a709b2 Dave Hansen 2016-02-12 1197 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS 33a709b2 Dave Hansen 2016-02-12 1198 /* ifdef to avoid doing 59-bit shift on 32-bit values */ 33a709b2 Dave Hansen 2016-02-12 @1199 return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0; 33a709b2 Dave Hansen 2016-02-12 1200 #else 33a709b2 Dave Hansen 2016-02-12 1201 return 0; 33a709b2 Dave Hansen 2016-02-12 1202 #endif 33a709b2 Dave Hansen 2016-02-12 1203 } 33a709b2 Dave Hansen 2016-02-12 1204 :::::: The code at line 1199 was first introduced by commit :::::: 33a709b25a760b91184bb335cf7d7c32b8123013 mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys :::::: TO: Dave Hansen <dave.han...@linux.intel.com> :::::: CC: Ingo Molnar <mi...@kernel.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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