tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git untested-uaccess head: e4c5cc79ec8eab6bc3e74d9994b33f368f137223 commit: 8ea7f40d2191c4bdc706c689856ac43157f1e32e [68/79] sparc: switch to RAW_COPY_USER config: sparc64-allyesconfig (attached as .config) compiler: sparc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 8ea7f40d2191c4bdc706c689856ac43157f1e32e # save the attached .config to linux build tree make.cross ARCH=sparc64 All error/warnings (new ones prefixed by >>): In file included from include/linux/highmem.h:8:0, from include/linux/pagemap.h:10, from block//partitions/check.h:1, from block//partitions/check.c:21: >> include/linux/uaccess.h:26:1: error: redefinition of '__copy_from_user' __copy_from_user(void *to, const void __user *from, unsigned long n) ^~~~~~~~~~~~~~~~ In file included from arch/sparc/include/asm/uaccess.h:4:0, from include/linux/uaccess.h:13, from include/linux/highmem.h:8, from include/linux/pagemap.h:10, from block//partitions/check.h:1, from block//partitions/check.c:21: arch/sparc/include/asm/uaccess_64.h:207:35: note: previous definition of '__copy_from_user' was here #define __copy_from_user_inatomic __copy_from_user ^ >> include/linux/uaccess.h:18:1: note: in expansion of macro '__copy_from_user_inatomic' __copy_from_user_inatomic(void *to, const void __user *from, unsigned long n) ^~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/highmem.h:8:0, from include/linux/pagemap.h:10, from block//partitions/check.h:1, from block//partitions/check.c:21: >> include/linux/uaccess.h:43:1: error: redefinition of '__copy_to_user' __copy_to_user(void __user *to, const void *from, unsigned long n) ^~~~~~~~~~~~~~ In file included from arch/sparc/include/asm/uaccess.h:4:0, from include/linux/uaccess.h:13, from include/linux/highmem.h:8, from include/linux/pagemap.h:10, from block//partitions/check.h:1, from block//partitions/check.c:21: arch/sparc/include/asm/uaccess_64.h:206:33: note: previous definition of '__copy_to_user' was here #define __copy_to_user_inatomic __copy_to_user ^ >> include/linux/uaccess.h:35:1: note: in expansion of macro '__copy_to_user_inatomic' __copy_to_user_inatomic(void __user *to, const void *from, unsigned long n) ^~~~~~~~~~~~~~~~~~~~~~~ vim +/__copy_from_user +26 include/linux/uaccess.h 5e6039d8 Al Viro 2016-12-27 7 5e6039d8 Al Viro 2016-12-27 8 #define VERIFY_READ 0 5e6039d8 Al Viro 2016-12-27 9 #define VERIFY_WRITE 1 5e6039d8 Al Viro 2016-12-27 10 19eddb0e Al Viro 2017-03-20 11 #define uaccess_kernel() segment_eq(get_fs(), KERNEL_DS) 19eddb0e Al Viro 2017-03-20 12 c22ce143 Hiro Yoshioka 2006-06-23 @13 #include <asm/uaccess.h> c22ce143 Hiro Yoshioka 2006-06-23 14 3fa08992 Al Viro 2017-03-20 15 #ifdef CONFIG_ARCH_HAS_RAW_COPY_USER 3fa08992 Al Viro 2017-03-20 16 3fa08992 Al Viro 2017-03-20 17 static __always_inline unsigned long 3fa08992 Al Viro 2017-03-20 @18 __copy_from_user_inatomic(void *to, const void __user *from, unsigned long n) 3fa08992 Al Viro 2017-03-20 19 { 3fa08992 Al Viro 2017-03-20 20 kasan_check_write(to, n); 3fa08992 Al Viro 2017-03-20 21 check_object_size(to, n, false); 3fa08992 Al Viro 2017-03-20 22 return raw_copy_from_user(to, from, n); 3fa08992 Al Viro 2017-03-20 23 } 3fa08992 Al Viro 2017-03-20 24 3fa08992 Al Viro 2017-03-20 25 static __always_inline unsigned long 3fa08992 Al Viro 2017-03-20 @26 __copy_from_user(void *to, const void __user *from, unsigned long n) 3fa08992 Al Viro 2017-03-20 27 { 3fa08992 Al Viro 2017-03-20 28 might_fault(); 3fa08992 Al Viro 2017-03-20 29 kasan_check_write(to, n); 3fa08992 Al Viro 2017-03-20 30 check_object_size(to, n, false); 3fa08992 Al Viro 2017-03-20 31 return raw_copy_from_user(to, from, n); 3fa08992 Al Viro 2017-03-20 32 } 3fa08992 Al Viro 2017-03-20 33 3fa08992 Al Viro 2017-03-20 34 static __always_inline unsigned long 3fa08992 Al Viro 2017-03-20 @35 __copy_to_user_inatomic(void __user *to, const void *from, unsigned long n) 3fa08992 Al Viro 2017-03-20 36 { 3fa08992 Al Viro 2017-03-20 37 kasan_check_read(to, n); 3fa08992 Al Viro 2017-03-20 38 check_object_size(to, n, true); 3fa08992 Al Viro 2017-03-20 39 return raw_copy_to_user(to, from, n); 3fa08992 Al Viro 2017-03-20 40 } 3fa08992 Al Viro 2017-03-20 41 3fa08992 Al Viro 2017-03-20 42 static __always_inline unsigned long 3fa08992 Al Viro 2017-03-20 @43 __copy_to_user(void __user *to, const void *from, unsigned long n) 3fa08992 Al Viro 2017-03-20 44 { 3fa08992 Al Viro 2017-03-20 45 might_fault(); 3fa08992 Al Viro 2017-03-20 46 kasan_check_read(to, n); :::::: The code at line 26 was first introduced by commit :::::: 3fa08992e9cc011aebe6aa4ab69430ab7af14e48 default from-user helpers :::::: TO: Al Viro <viro@xxxxxxxxxxxxxxxxxx> :::::: CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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