Hi Edward, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [cannot apply to v5.3-rc6 next-20190827] [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/Edward-Chron/mm-oom_debug-Add-Debug-base-code/20190827-183210 config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 7.4.0 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=7.4.0 make.cross ARCH=sh If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): In file included from include/linux/printk.h:6:0, from include/linux/kernel.h:15, from include/linux/list.h:9, from include/linux/wait.h:7, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/debugfs.h:15, from mm/oom_kill_debug.c:135: >> mm/oom_kill_debug.c:261:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] subsys_initcall(oom_debug_init) ^ include/linux/init.h:197:50: note: in definition of macro '___define_initcall' __attribute__((__section__(#__sec ".init"))) = fn; ^~ include/linux/init.h:224:30: note: in expansion of macro '__define_initcall' #define subsys_initcall(fn) __define_initcall(fn, 4) ^~~~~~~~~~~~~~~~~ >> mm/oom_kill_debug.c:261:1: note: in expansion of macro 'subsys_initcall' subsys_initcall(oom_debug_init) ^~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +261 mm/oom_kill_debug.c > 135 #include <linux/debugfs.h> 136 #include <linux/fs.h> 137 #include <linux/init.h> 138 #include <linux/kernel.h> 139 #include <linux/kobject.h> 140 #include <linux/oom.h> 141 #include <linux/printk.h> 142 #include <linux/slab.h> 143 #include <linux/string.h> 144 #include <linux/sysfs.h> 145 #include "oom_kill_debug.h" 146 147 #define OOMD_MAX_FNAME 48 148 #define OOMD_MAX_OPTNAME 32 149 150 #define K(x) ((x) << (PAGE_SHIFT-10)) 151 152 static const char oom_debug_path[] = "/sys/kernel/debug/oom"; 153 154 static const char od_root_name[] = "oom"; 155 static struct dentry *od_root_dir; 156 static u32 oom_kill_debug_oom_events; 157 158 /* One oom_debug_option entry per debug option */ 159 struct oom_debug_option { 160 const char *option_name; 161 umode_t mode; 162 struct dentry *dir_dentry; 163 struct dentry *enabled_dentry; 164 struct dentry *tenthpercent_dentry; 165 bool enabled; 166 u16 tenthpercent; 167 bool support_tpercent; 168 }; 169 170 /* Table of oom debug options, new options need to be added here */ 171 static struct oom_debug_option oom_debug_options_table[] = { 172 {} 173 }; 174 175 /* Option index by name for order one-lookup, add new options entry here */ 176 enum oom_debug_options_index { 177 OUT_OF_BOUNDS 178 }; 179 180 bool oom_kill_debug_enabled(u16 index) 181 { 182 return oom_debug_options_table[index].enabled; 183 } 184 185 u16 oom_kill_debug_tenthpercent(u16 index) 186 { 187 return oom_debug_options_table[index].tenthpercent; 188 } 189 190 static void filename_gen(char *pdest, const char *optname, const char *fname) 191 { 192 size_t len; 193 char *pmsg; 194 195 sprintf(pdest, "%s", optname); 196 len = strnlen(pdest, OOMD_MAX_OPTNAME); 197 pmsg = pdest + len; 198 sprintf(pmsg, "%s", fname); 199 } 200 201 static void enabled_file_gen(struct oom_debug_option *entry) 202 { 203 char filename[OOMD_MAX_FNAME]; 204 205 filename_gen(filename, entry->option_name, "enabled"); 206 debugfs_create_bool(filename, 0644, entry->dir_dentry, 207 &entry->enabled); 208 entry->enabled = OOM_KILL_DEBUG_DEFAULT_ENABLED; 209 } 210 211 static void tpercent_file_gen(struct oom_debug_option *entry) 212 { 213 char filename[OOMD_MAX_FNAME]; 214 215 filename_gen(filename, entry->option_name, "tenthpercent"); 216 debugfs_create_u16(filename, 0644, entry->dir_dentry, 217 &entry->tenthpercent); 218 entry->tenthpercent = OOM_KILL_DEBUG_DEFAULT_TENTHPERCENT; 219 } 220 221 static void oom_debugfs_init(void) 222 { 223 struct oom_debug_option *table, *entry; 224 225 od_root_dir = debugfs_create_dir(od_root_name, NULL); 226 227 table = oom_debug_options_table; 228 for (entry = table; entry->option_name; entry++) { 229 entry->dir_dentry = od_root_dir; 230 enabled_file_gen(entry); 231 if (entry->support_tpercent) 232 tpercent_file_gen(entry); 233 } 234 } 235 236 static void oom_debug_common_cleanup(void) 237 { 238 /* Cleanup for oom root directory */ 239 debugfs_remove(od_root_dir); 240 } 241 242 u32 oom_kill_debug_oom_event(void) 243 { 244 return oom_kill_debug_oom_events; 245 } 246 247 u32 oom_kill_debug_oom_event_is(void) 248 { 249 ++oom_kill_debug_oom_events; 250 251 return oom_kill_debug_oom_events; 252 } 253 254 static void __init oom_debug_init(void) 255 { 256 /* Ensure we have a debugfs oom root directory */ 257 od_root_dir = debugfs_lookup(od_root_name, NULL); 258 if (!od_root_dir) 259 oom_debugfs_init(); 260 } > 261 subsys_initcall(oom_debug_init) 262 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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