Hi Jason, I love your patch! Perhaps something to improve: [auto build test WARNING on mmotm/master] [also build test WARNING on v4.17 next-20180608] [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/Jason-Baron/mm-madvise-allow-MADV_DONTNEED-to-free-memory-that-is-MLOCK_ONFAULT/20180609-185549 base: git://git.cmpxchg.org/linux-mmotm.git master config: alpha-allmodconfig (attached as .config) compiler: alpha-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=alpha All warnings (new ones prefixed by >>): In file included from mm//internal.h:18:0, from mm//swap.c:39: include/uapi/asm-generic/mman-common.h:22:0: warning: "MAP_FIXED" redefined #define MAP_FIXED 0x10 /* Interpret addr exactly */ In file included from include/uapi/linux/mman.h:5:0, from include/linux/mman.h:9, from mm//swap.c:20: arch/alpha/include/uapi/asm/mman.h:17:0: note: this is the location of the previous definition #define MAP_FIXED 0x100 /* Interpret addr exactly */ In file included from mm//internal.h:18:0, from mm//swap.c:39: include/uapi/asm-generic/mman-common.h:23:0: warning: "MAP_ANONYMOUS" redefined #define MAP_ANONYMOUS 0x20 /* don't use a file */ In file included from include/uapi/linux/mman.h:5:0, from include/linux/mman.h:9, from mm//swap.c:20: arch/alpha/include/uapi/asm/mman.h:18:0: note: this is the location of the previous definition #define MAP_ANONYMOUS 0x10 /* don't use a file */ In file included from mm//internal.h:18:0, from mm//swap.c:39: include/uapi/asm-generic/mman-common.h:27:0: warning: "MAP_UNINITIALIZED" redefined # define MAP_UNINITIALIZED 0x0 /* Don't support this flag */ In file included from mm//swap.c:20:0: include/linux/mman.h:25:0: note: this is the location of the previous definition #define MAP_UNINITIALIZED 0 In file included from mm//internal.h:18:0, from mm//swap.c:39: >> include/uapi/asm-generic/mman-common.h:31:0: warning: "MAP_FIXED_NOREPLACE" redefined #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ In file included from include/uapi/linux/mman.h:5:0, from include/linux/mman.h:9, from mm//swap.c:20: arch/alpha/include/uapi/asm/mman.h:35:0: note: this is the location of the previous definition #define MAP_FIXED_NOREPLACE 0x200000/* MAP_FIXED which doesn't unmap underlying mapping */ In file included from mm//internal.h:18:0, from mm//swap.c:39: include/uapi/asm-generic/mman-common.h:39:0: warning: "MS_INVALIDATE" redefined #define MS_INVALIDATE 2 /* invalidate the caches */ In file included from include/uapi/linux/mman.h:5:0, from include/linux/mman.h:9, from mm//swap.c:20: arch/alpha/include/uapi/asm/mman.h:39:0: note: this is the location of the previous definition #define MS_INVALIDATE 4 /* invalidate the caches */ In file included from mm//internal.h:18:0, from mm//swap.c:39: include/uapi/asm-generic/mman-common.h:40:0: warning: "MS_SYNC" redefined #define MS_SYNC 4 /* synchronous memory sync */ In file included from include/uapi/linux/mman.h:5:0, from include/linux/mman.h:9, from mm//swap.c:20: arch/alpha/include/uapi/asm/mman.h:38:0: note: this is the location of the previous definition #define MS_SYNC 2 /* synchronous memory sync */ In file included from mm//internal.h:18:0, from mm//swap.c:39: >> include/uapi/asm-generic/mman-common.h:46:0: warning: "MADV_DONTNEED" redefined #define MADV_DONTNEED 4 /* don't need these pages */ In file included from include/uapi/linux/mman.h:5:0, from include/linux/mman.h:9, from mm//swap.c:20: arch/alpha/include/uapi/asm/mman.h:52:0: note: this is the location of the previous definition #define MADV_DONTNEED 6 /* don't need these pages */ vim +/MAP_FIXED_NOREPLACE +31 include/uapi/asm-generic/mman-common.h 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 17 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 18 #define MAP_SHARED 0x01 /* Share changes */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 19 #define MAP_PRIVATE 0x02 /* Changes are private */ 1c972597 include/uapi/asm-generic/mman-common.h Dan Williams 2017-11-01 20 #define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 21 #define MAP_TYPE 0x0f /* Mask for type of mapping */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 22 #define MAP_FIXED 0x10 /* Interpret addr exactly */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 23 #define MAP_ANONYMOUS 0x20 /* don't use a file */ ea637639 include/asm-generic/mman-common.h Jie Zhang 2009-12-14 24 #ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED ea637639 include/asm-generic/mman-common.h Jie Zhang 2009-12-14 25 # define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be uninitialized */ ea637639 include/asm-generic/mman-common.h Jie Zhang 2009-12-14 26 #else ea637639 include/asm-generic/mman-common.h Jie Zhang 2009-12-14 @27 # define MAP_UNINITIALIZED 0x0 /* Don't support this flag */ ea637639 include/asm-generic/mman-common.h Jie Zhang 2009-12-14 28 #endif 4ed28639 include/uapi/asm-generic/mman-common.h Michal Hocko 2018-04-10 29 4ed28639 include/uapi/asm-generic/mman-common.h Michal Hocko 2018-04-10 30 /* 0x0100 - 0x80000 flags are defined in asm-generic/mman.h */ 4ed28639 include/uapi/asm-generic/mman-common.h Michal Hocko 2018-04-10 @31 #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 32 b0f205c2 include/uapi/asm-generic/mman-common.h Eric B Munson 2015-11-05 33 /* b0f205c2 include/uapi/asm-generic/mman-common.h Eric B Munson 2015-11-05 34 * Flags for mlock b0f205c2 include/uapi/asm-generic/mman-common.h Eric B Munson 2015-11-05 35 */ b0f205c2 include/uapi/asm-generic/mman-common.h Eric B Munson 2015-11-05 36 #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ b0f205c2 include/uapi/asm-generic/mman-common.h Eric B Munson 2015-11-05 37 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 38 #define MS_ASYNC 1 /* sync memory asynchronously */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 39 #define MS_INVALIDATE 2 /* invalidate the caches */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 40 #define MS_SYNC 4 /* synchronous memory sync */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 41 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 42 #define MADV_NORMAL 0 /* no further special treatment */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 43 #define MADV_RANDOM 1 /* expect random page references */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 44 #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 45 #define MADV_WILLNEED 3 /* will need these pages */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 @46 #define MADV_DONTNEED 4 /* don't need these pages */ 5f6164f3 include/asm-generic/mman.h Michael S. Tsirkin 2006-02-15 47 :::::: The code at line 31 was first introduced by commit :::::: 4ed28639519c7bad5f518e70b3284c6e0763e650 fs, elf: drop MAP_FIXED usage from elf_map :::::: TO: Michal Hocko <mhocko@xxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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