Messages in this thread | | | Date | Fri, 9 Oct 2015 14:46:19 +0800 | From | kbuild test robot <> | Subject | Re: [PATCH v3 3/7] arm64: ftrace: fix a stack tracer's output under function graph tracer |
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Hi AKASHI,
[auto build test ERROR on v4.3-rc4 -- if it's inappropriate base, please ignore]
config: arm64-allmodconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm64
Note: the linux-review/AKASHI-Takahiro/arm64-ftrace-fix-incorrect-output-from-stack-tracer HEAD f6c03913c640aa1d196348c49f15cfdc264393e0 builds fine. It only hurts bisectibility.
All errors (new ones prefixed by >>):
arch/arm64/kernel/stacktrace.c: In function 'save_trace': >> arch/arm64/kernel/stacktrace.c:93:29: error: 'return_to_handler' undeclared (first use in this function) if (addr == (unsigned long)return_to_handler - AARCH64_INSN_SIZE) { ^ arch/arm64/kernel/stacktrace.c:93:29: note: each undeclared identifier is reported only once for each function it appears in >> arch/arm64/kernel/stacktrace.c:101:4: error: invalid use of undefined type 'struct ftrace_ret_stack' current->ret_stack[data->ret_stack_index--].ret ^ >> arch/arm64/kernel/stacktrace.c:101:22: error: dereferencing pointer to incomplete type current->ret_stack[data->ret_stack_index--].ret ^
vim +/return_to_handler +93 arch/arm64/kernel/stacktrace.c
87 { 88 struct stack_trace_data *data = d; 89 struct stack_trace *trace = data->trace; 90 unsigned long addr = frame->pc; 91 92 #ifdef CONFIG_FUNCTION_GRAPH_TRACER > 93 if (addr == (unsigned long)return_to_handler - AARCH64_INSN_SIZE) { 94 /* 95 * This is a case where function graph tracer has 96 * modified a return address (LR) in a stack frame 97 * to hook a function return. 98 * So replace it to an original value. 99 */ 100 frame->pc = addr = > 101 current->ret_stack[data->ret_stack_index--].ret 102 - AARCH64_INSN_SIZE; 103 } 104 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
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