Hi Hoeun, [auto build test WARNING on next-20170208] [also build test WARNING on v4.10-rc7] [cannot apply to linus/master linux/master v4.9-rc8 v4.9-rc7 v4.9-rc6] [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/Hoeun-Ryu/fork-free-vmapped-stacks-in-cache-when-cpus-are-offline/20170209-124143 reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ sparse warnings: (new ones prefixed by >>) include/linux/compiler.h:264:8: sparse: attribute 'no_sanitize_address': unknown attribute kernel/fork.c:177:25: sparse: undefined identifier 'NR_CACHED_STACKS' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int [signed] [assigned] i >> kernel/fork.c:178:46: sparse: cannot dereference this type >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int [signed] [assigned] i >> kernel/fork.c:178:46: sparse: cannot dereference this type >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int [signed] [assigned] i >> kernel/fork.c:178:46: sparse: cannot dereference this type kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int [signed] [assigned] i >> kernel/fork.c:178:46: sparse: cannot dereference this type kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int [signed] [assigned] i >> kernel/fork.c:178:46: sparse: cannot dereference this type kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' kernel/fork.c:178:46: sparse: undefined identifier 'cached_stacks' >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for operation (+) kernel/fork.c:178:46: left side has type bad type kernel/fork.c:178:46: right side has type int [signed] [assigned] i >> kernel/fork.c:178:46: sparse: cannot dereference this type >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement >> kernel/fork.c:178:46: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for operation (+) kernel/fork.c:183:17: left side has type bad type kernel/fork.c:183:17: right side has type int [signed] [assigned] i kernel/fork.c:183:17: sparse: cannot dereference this type kernel/fork.c:183:17: sparse: incompatible types for operation (+) kernel/fork.c:183:17: left side has type bad type kernel/fork.c:183:17: right side has type int kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for operation (+) kernel/fork.c:183:17: left side has type bad type kernel/fork.c:183:17: right side has type int [signed] [assigned] i kernel/fork.c:183:17: sparse: cannot dereference this type kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for operation (+) kernel/fork.c:183:17: left side has type bad type kernel/fork.c:183:17: right side has type int [signed] [assigned] i kernel/fork.c:183:17: sparse: cannot dereference this type kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for operation (+) kernel/fork.c:183:17: left side has type bad type kernel/fork.c:183:17: right side has type int [signed] [assigned] i kernel/fork.c:183:17: sparse: cannot dereference this type kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: undefined identifier 'cached_stacks' kernel/fork.c:183:17: sparse: incompatible types for 'case' statement kernel/fork.c:183:17: sparse: incompatible types for 'case' statement >> kernel/fork.c:183:17: sparse: too many errors kernel/fork.c: In function 'free_vm_stack_cache': kernel/fork.c:177:18: error: 'NR_CACHED_STACKS' undeclared (first use in this function) for (i = 0; i < NR_CACHED_STACKS; i++) { ^~~~~~~~~~~~~~~~ kernel/fork.c:177:18: note: each undeclared identifier is reported only once for each function it appears in In file included from include/asm-generic/percpu.h:6:0, from arch/x86/include/asm/percpu.h:542, from arch/x86/include/asm/preempt.h:5, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/mmzone.h:7, from include/linux/gfp.h:5, from include/linux/slab.h:14, from kernel/fork.c:14: kernel/fork.c:178:46: error: 'cached_stacks' undeclared (first use in this function) struct vm_struct *vm_stack = this_cpu_read(cached_stacks[i]); ^ include/linux/percpu-defs.h:305:9: note: in definition of macro '__pcpu_size_call_return' typeof(variable) pscr_ret__; \ ^~~~~~~~ kernel/fork.c:178:32: note: in expansion of macro 'this_cpu_read' struct vm_struct *vm_stack = this_cpu_read(cached_stacks[i]); ^~~~~~~~~~~~~ include/linux/percpu-defs.h:304:1: warning: initialization makes pointer from integer without a cast [-Wint-conversion] ({ \ ^ include/linux/percpu-defs.h:494:29: note: in expansion of macro '__pcpu_size_call_return' #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) ^~~~~~~~~~~~~~~~~~~~~~~ kernel/fork.c:178:32: note: in expansion of macro 'this_cpu_read' struct vm_struct *vm_stack = this_cpu_read(cached_stacks[i]); ^~~~~~~~~~~~~ In file included from arch/x86/include/asm/preempt.h:5:0, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/mmzone.h:7, from include/linux/gfp.h:5, from include/linux/slab.h:14, from kernel/fork.c:14: arch/x86/include/asm/percpu.h:94:13: warning: assignment makes integer from pointer without a cast [-Wint-conversion] pto_tmp__ = (val); \ ^ arch/x86/include/asm/percpu.h:416:36: note: in expansion of macro 'percpu_to_op' #define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val) ^~~~~~~~~~~~ include/linux/percpu-defs.h:364:11: note: in expansion of macro 'this_cpu_write_1' case 1: stem##1(variable, __VA_ARGS__);break; \ ^~~~ include/linux/percpu-defs.h:495:34: note: in expansion of macro '__pcpu_size_call' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~ kernel/fork.c:183:3: note: in expansion of macro 'this_cpu_write' this_cpu_write(cached_stacks[i], NULL); ^~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:101:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] : "qi" ((pto_T__)(val))); \ ^ arch/x86/include/asm/percpu.h:416:36: note: in expansion of macro 'percpu_to_op' #define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val) ^~~~~~~~~~~~ include/linux/percpu-defs.h:364:11: note: in expansion of macro 'this_cpu_write_1' case 1: stem##1(variable, __VA_ARGS__);break; \ ^~~~ include/linux/percpu-defs.h:495:34: note: in expansion of macro '__pcpu_size_call' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~ kernel/fork.c:183:3: note: in expansion of macro 'this_cpu_write' this_cpu_write(cached_stacks[i], NULL); ^~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:106:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] : "ri" ((pto_T__)(val))); \ ^ arch/x86/include/asm/percpu.h:416:36: note: in expansion of macro 'percpu_to_op' #define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val) ^~~~~~~~~~~~ include/linux/percpu-defs.h:364:11: note: in expansion of macro 'this_cpu_write_1' case 1: stem##1(variable, __VA_ARGS__);break; \ ^~~~ include/linux/percpu-defs.h:495:34: note: in expansion of macro '__pcpu_size_call' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~ kernel/fork.c:183:3: note: in expansion of macro 'this_cpu_write' this_cpu_write(cached_stacks[i], NULL); ^~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:111:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] : "ri" ((pto_T__)(val))); \ ^ arch/x86/include/asm/percpu.h:416:36: note: in expansion of macro 'percpu_to_op' #define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val) ^~~~~~~~~~~~ include/linux/percpu-defs.h:364:11: note: in expansion of macro 'this_cpu_write_1' case 1: stem##1(variable, __VA_ARGS__);break; \ ^~~~ include/linux/percpu-defs.h:495:34: note: in expansion of macro '__pcpu_size_call' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~ kernel/fork.c:183:3: note: in expansion of macro 'this_cpu_write' this_cpu_write(cached_stacks[i], NULL); ^~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:116:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] vim +178 kernel/fork.c 171 #endif 172 173 static int free_vm_stack_cache(unsigned int cpu) 174 { 175 int i; 176 > 177 for (i = 0; i < NR_CACHED_STACKS; i++) { > 178 struct vm_struct *vm_stack = > this_cpu_read(cached_stacks[i]); 179 if (!vm_stack) 180 continue; 181 182 vfree(vm_stack->addr); > 183 this_cpu_write(cached_stacks[i], NULL); 184 } 185 186 return 0; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
