Messages in this thread | | | Date | Tue, 25 Oct 2022 15:18:48 +0800 | From | kernel test robot <> | Subject | [mark:arm64/ftrace/per-callsite-ops 1/11] include/linux/ftrace.h:445:20: error: redefinition of 'arch_ftrace_set_direct_caller' |
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Hi Mark,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/ftrace/per-callsite-ops head: f73350f69ff3e7a2061b0021644bc9846664a3d3 commit: 6262590b79bc8a27439257aebbfc3d1ce45791dd [1/11] ftrace: pass fregs to arch_ftrace_set_direct_caller() config: x86_64-randconfig-a003-20221024 (attached as .config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) 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://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id=6262590b79bc8a27439257aebbfc3d1ce45791dd git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark arm64/ftrace/per-callsite-ops git checkout 6262590b79bc8a27439257aebbfc3d1ce45791dd # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 prepare
If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from arch/x86/kernel/asm-offsets.c:22: In file included from arch/x86/kernel/../kvm/vmx/vmx.h:5: In file included from include/linux/kvm_host.h:32: >> include/linux/ftrace.h:445:20: error: redefinition of 'arch_ftrace_set_direct_caller' static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, ^ arch/x86/include/asm/ftrace.h:69:20: note: previous definition is here static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, unsigned long addr) ^ 1 error generated. make[2]: *** [scripts/Makefile.build:118: arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:1270: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:231: __sub-make] Error 2 make: Target 'prepare' not remade because of errors.
vim +/arch_ftrace_set_direct_caller +445 include/linux/ftrace.h
431 432 /* 433 * This must be implemented by the architecture. 434 * It is the way the ftrace direct_ops helper, when called 435 * via ftrace (because there's other callbacks besides the 436 * direct call), can inform the architecture's trampoline that this 437 * routine has a direct caller, and what the caller is. 438 * 439 * For example, in x86, it returns the direct caller 440 * callback function via the regs->orig_ax parameter. 441 * Then in the ftrace trampoline, if this is set, it makes 442 * the return from the trampoline jump to the direct caller 443 * instead of going back to the function it just traced. 444 */ > 445 static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, 446 unsigned long addr) { } 447 #endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */ 448
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