Messages in this thread | | | Date | Wed, 4 Nov 2015 12:29:40 +0800 | From | kbuild test robot <> | Subject | Re: [PATCH v3] perf: fix RCU issues with cgroup monitoring mode |
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Hi Stephane,
[auto build test ERROR on: tip/perf/core] [also build test ERROR on: v4.3 next-20151103]
url: https://github.com/0day-ci/linux/commits/Stephane-Eranian/perf-fix-RCU-issues-with-cgroup-monitoring-mode/20151104-121512 config: parisc-allyesconfig (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=parisc
All errors (new ones prefixed by >>):
In file included from include/linux/trace_events.h:9:0, from include/trace/syscall.h:6, from include/linux/syscalls.h:81, from kernel/events/core.c:34: include/linux/perf_event.h: In function 'perf_cgroup_from_task': >> include/linux/perf_event.h:702:2: error: implicit declaration of function 'lockdep_is_held' [-Werror=implicit-function-declaration] bool safe = ctx ? lockdep_is_held(&ctx->lock) : true; ^ include/linux/perf_event.h:702:7: warning: unused variable 'safe' [-Wunused-variable] bool safe = ctx ? lockdep_is_held(&ctx->lock) : true; ^ cc1: some warnings being treated as errors
vim +/lockdep_is_held +702 include/linux/perf_event.h
696 * this function. In other words, we cannot call this function 697 * if there is no cgroup event for the current CPU context. 698 */ 699 static inline struct perf_cgroup * 700 perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx) 701 { > 702 bool safe = ctx ? lockdep_is_held(&ctx->lock) : true; 703 return container_of(task_css_check(task, perf_event_cgrp_id, safe), 704 struct perf_cgroup, css); 705 }
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