tree: https://github.com/weiny2/linux-kernel.git tip-pks-v4.3-5.12-rc head: 12193a5eaa93574ad2abd5e21cf03266e79c0fee commit: 13bd8321d6e376da6a5ecda33fddee7a2c6db7ea [12/16] kmap: Add stray access protection for device pages config: csky-defconfig (attached as .config) compiler: csky-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/weiny2/linux-kernel/commit/13bd8321d6e376da6a5ecda33fd... git remote add weiny2 https://github.com/weiny2/linux-kernel.git git fetch --no-tags weiny2 tip-pks-v4.3-5.12-rc git checkout 13bd8321d6e376da6a5ecda33fddee7a2c6db7ea # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/blkdev.h:14, from include/linux/blk-cgroup.h:23, from include/linux/writeback.h:14, from include/linux/memcontrol.h:22, from include/linux/swap.h:9, from include/linux/suspend.h:5, from include/linux/regulator/consumer.h:35, from include/linux/phy/phy.h:17, from include/linux/usb/otg.h:13, from include/linux/usb/of.h:12, from drivers/usb/phy/of.c:9: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/fscache.h:19, from include/linux/fscache-cache.h:17, from fs/fscache/internal.h:27, from fs/fscache/object.c:15: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr fs/fscache/object.c: In function 'fscache_object_work_func': fs/fscache/object.c:280:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] 280 | unsigned long start; | ^~~~~ At top level: fs/fscache/object.c:31:25: warning: 'fscache_osm_CREATE_OBJECT' defined but not used [-Wunused-const-variable=] 31 | #define __STATE_NAME(n) fscache_osm_##n | ^~~~~~~~~~~~ fs/fscache/object.c:42:29: note: in expansion of macro '__STATE_NAME' 42 | const struct fscache_state __STATE_NAME(n) = { \ | ^~~~~~~~~~~~ fs/fscache/object.c:80:8: note: in expansion of macro 'WORK_STATE' 80 | static WORK_STATE(CREATE_OBJECT, "CRTO", fscache_look_up_object); | ^~~~~~~~~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/fscache.h:19, from include/linux/fscache-cache.h:17, from fs/fscache/internal.h:27, from fs/fscache/operation.c:14: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr fs/fscache/operation.c: In function 'fscache_op_work_func': fs/fscache/operation.c:619:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] 619 | unsigned long start; | ^~~~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/fscache.h:19, from include/linux/fscache-cache.h:17, from fs/fscache/page.c:10: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr fs/fscache/page.c: In function 'fscache_wait_for_deferred_lookup': fs/fscache/page.c:343:16: warning: variable 'jif' set but not used [-Wunused-but-set-variable] 343 | unsigned long jif; | ^~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/fscache.h:19, from include/linux/fscache-cache.h:17, from fs/cachefiles/internal.h:15, from fs/cachefiles/namei.c:19: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr fs/cachefiles/namei.c: In function 'cachefiles_walk_to_object': fs/cachefiles/namei.c:499:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] 499 | unsigned long start; | ^~~~~ fs/cachefiles/namei.c: In function 'cachefiles_get_directory': fs/cachefiles/namei.c:768:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] 768 | unsigned long start; | ^~~~~ fs/cachefiles/namei.c: In function 'cachefiles_check_active': fs/cachefiles/namei.c:879:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] 879 | unsigned long start; | ^~~~~ -- In file included from include/linux/highmem.h:14, from net/socket.c:74: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr net/socket.c: In function '__sys_getsockopt': net/socket.c:2143:6: warning: variable 'max_optlen' set but not used [-Wunused-but-set-variable] 2143 | int max_optlen; | ^~~~~~~~~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/blkdev.h:14, from include/linux/blk-cgroup.h:23, from include/linux/writeback.h:14, from include/linux/memcontrol.h:22, from include/net/sock.h:53, from include/linux/tcp.h:19, from include/linux/ipv6.h:88, from include/net/addrconf.h:50, from lib/vsprintf.c:40: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr lib/vsprintf.c: In function 'va_format': lib/vsprintf.c:1663:2: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1663 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va); | ^~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/blkdev.h:14, from include/linux/blk-cgroup.h:23, from include/linux/writeback.h:14, from include/linux/memcontrol.h:22, from include/linux/swap.h:9, from fs/proc/meminfo.c:12: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr fs/proc/meminfo.c: At top level: fs/proc/meminfo.c:22:28: warning: no previous prototype for 'arch_report_meminfo' [-Wmissing-prototypes] 22 | void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) | ^~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/blkdev.h:14, from include/linux/blk-cgroup.h:23, from include/linux/writeback.h:14, from include/linux/memcontrol.h:22, from include/net/sock.h:53, from include/linux/mroute_base.h:8, from include/linux/mroute.h:10, from net/ipv4/route.c:82: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr net/ipv4/route.c: In function 'ip_rt_send_redirect': net/ipv4/route.c:880:6: warning: variable 'log_martians' set but not used [-Wunused-but-set-variable] 880 | int log_martians; | ^~~~~~~~~~~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/blkdev.h:14, from include/linux/blk-cgroup.h:23, from include/linux/writeback.h:14, from include/trace/events/random.h:8, from drivers/char/random.c:348: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr drivers/char/random.c: At top level: drivers/char/random.c:2283:6: warning: no previous prototype for 'add_hwgenerator_randomness' [-Wmissing-prototypes] 2283 | void add_hwgenerator_randomness(const char *buffer, size_t count, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/highmem.h:14, from include/linux/pagemap.h:11, from include/linux/blkdev.h:14, from fs/ext4/ext4.h:21, from fs/ext4/fast_commit.c:10: include/linux/highmem-internal.h: In function 'kmap_local_pfn': 106 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h:106:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/highmem-internal.h: In function 'kmap_atomic_pfn': include/linux/highmem-internal.h:133:24: error: 'page' undeclared (first use in this function) 133 | dev_page_mk_readwrite(page, false); | ^~~~ include/linux/highmem-internal.h: In function '__kunmap_atomic': 140 | dev_page_mk_noaccess(kmap_to_page(vaddr), false); | ^~~~~ | addr fs/ext4/fast_commit.c: In function 'ext4_fc_replay_del_range': fs/ext4/fast_commit.c:1807:51: warning: suggest braces around empty body in an 'if' statement [-Wempty-body] 1807 | jbd_debug(1, "ext4_punch_hole returned %d", ret); | ^ .. vim +/page +106 include/linux/highmem-internal.h 103 104 static inline void *kmap_local_pfn(unsigned long pfn) 105 { 107 return __kmap_local_pfn_prot(pfn, kmap_prot); 108 } 109 110 static inline void __kunmap_local(void *vaddr) 111 { 112 kunmap_local_indexed(vaddr); 113 dev_page_mk_noaccess(kmap_to_page(vaddr), false); 114 } 115 116 static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) 117 { 118 preempt_disable(); 119 pagefault_disable(); 120 dev_page_mk_readwrite(page, false); 121 return __kmap_local_page_prot(page, prot); 122 } 123 124 static inline void *kmap_atomic(struct page *page) 125 { 126 return kmap_atomic_prot(page, kmap_prot); 127 } 128 129 static inline void *kmap_atomic_pfn(unsigned long pfn) 130 { 131 preempt_disable(); 132 pagefault_disable(); 133 dev_page_mk_readwrite(page, false); 134 return __kmap_local_pfn_prot(pfn, kmap_prot); 135 } 136 137 static inline void __kunmap_atomic(void *addr) 138 { 139 kunmap_local_indexed(addr); 141 pagefault_enable(); 142 preempt_enable(); 143 } 144 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org