Hi Binoy, [auto build test WARNING on tip/perf/core] [also build test WARNING on v4.8-rc3 next-20160819] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] [Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on] [Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Binoy-Jayan/tracing-Deference-pointers-without-RCU-checks/20160818-151235 config: i386-randconfig-c0-08190953 (attached as .config) compiler: gcc-4.9 (Debian 4.9.3-14) 4.9.3 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from include/linux/kallsyms.h:9, from kernel/trace/trace_irqsoff.c:12: include/trace/events/latency.h: In function 'trace_raw_output_latency_template': >> include/linux/compiler.h:152:17: warning: format '%lu' expects argument of >> type 'long unsigned int', but argument 4 has type 'cycles_t' [-Wformat=] static struct ftrace_branch_data \ ^ include/linux/compiler.h:147:23: note: in expansion of macro '__trace_if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^ include/trace/trace_events.h:324:2: note: in expansion of macro 'if' if (ret != TRACE_TYPE_HANDLED) \ ^ include/trace/events/latency.h:9:1: note: in expansion of macro 'DECLARE_EVENT_CLASS' DECLARE_EVENT_CLASS(latency_template, ^ In file included from include/asm-generic/percpu.h:6:0, from arch/x86/include/asm/percpu.h:552, from arch/x86/include/asm/preempt.h:5, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/uapi/linux/timex.h:56, from include/linux/timex.h:56, from include/linux/sched.h:19, from include/linux/uaccess.h:4, from kernel/trace/trace_irqsoff.c:13: kernel/trace/trace_irqsoff.c: At top level: kernel/trace/trace_irqsoff.c:28:32: warning: 'ts_irqs' defined but not used [-Wunused-variable] static DEFINE_PER_CPU(cycle_t, ts_irqs); ^ include/linux/percpu-defs.h:105:19: note: in definition of macro 'DEFINE_PER_CPU_SECTION' __typeof__(type) name ^ kernel/trace/trace_irqsoff.c:28:8: note: in expansion of macro 'DEFINE_PER_CPU' static DEFINE_PER_CPU(cycle_t, ts_irqs); ^ kernel/trace/trace_irqsoff.c:29:32: warning: 'ts_preempt' defined but not used [-Wunused-variable] static DEFINE_PER_CPU(cycle_t, ts_preempt); ^ include/linux/percpu-defs.h:105:19: note: in definition of macro 'DEFINE_PER_CPU_SECTION' __typeof__(type) name ^ kernel/trace/trace_irqsoff.c:29:8: note: in expansion of macro 'DEFINE_PER_CPU' static DEFINE_PER_CPU(cycle_t, ts_preempt); ^ vim +152 include/linux/compiler.h 45b79749 Steven Rostedt 2008-11-21 136 # define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1)) 1f0d69a9 Steven Rostedt 2008-11-12 137 # endif 1f0d69a9 Steven Rostedt 2008-11-12 138 # ifndef unlikely 45b79749 Steven Rostedt 2008-11-21 139 # define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0)) 1f0d69a9 Steven Rostedt 2008-11-12 140 # endif 2bcd521a Steven Rostedt 2008-11-21 141 2bcd521a Steven Rostedt 2008-11-21 142 #ifdef CONFIG_PROFILE_ALL_BRANCHES 2bcd521a Steven Rostedt 2008-11-21 143 /* 2bcd521a Steven Rostedt 2008-11-21 144 * "Define 'is'", Bill Clinton 2bcd521a Steven Rostedt 2008-11-21 145 * "Define 'if'", Steven Rostedt 2bcd521a Steven Rostedt 2008-11-21 146 */ ab3c9c68 Linus Torvalds 2009-04-07 147 #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ab3c9c68 Linus Torvalds 2009-04-07 148 #define __trace_if(cond) \ b33c8ff4 Arnd Bergmann 2016-02-12 149 if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ 2bcd521a Steven Rostedt 2008-11-21 150 ({ \ 2bcd521a Steven Rostedt 2008-11-21 151 int ______r; \ 2bcd521a Steven Rostedt 2008-11-21 @152 static struct ftrace_branch_data \ 2bcd521a Steven Rostedt 2008-11-21 153 __attribute__((__aligned__(4))) \ 2bcd521a Steven Rostedt 2008-11-21 154 __attribute__((section("_ftrace_branch"))) \ 2bcd521a Steven Rostedt 2008-11-21 155 ______f = { \ 2bcd521a Steven Rostedt 2008-11-21 156 .func = __func__, \ 2bcd521a Steven Rostedt 2008-11-21 157 .file = __FILE__, \ 2bcd521a Steven Rostedt 2008-11-21 158 .line = __LINE__, \ 2bcd521a Steven Rostedt 2008-11-21 159 }; \ 2bcd521a Steven Rostedt 2008-11-21 160 ______r = !!(cond); \ :::::: The code at line 152 was first introduced by commit :::::: 2bcd521a684cc94befbe2ce7d5b613c841b0d304 trace: profile all if conditionals :::::: TO: Steven Rostedt <srost...@redhat.com> :::::: CC: Ingo Molnar <mi...@elte.hu> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
Description: Binary data
