diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c index 6adda2b5fa31728a934c7400bcd17d5724d265ca..c074e66ad224e83d18d1f278afc78aa00e18b494 100644 --- a/arch/arm/oprofile/common.c +++ b/arch/arm/oprofile/common.c @@ -10,8 +10,6 @@ */ #include -#include -#include #include #include #include @@ -46,6 +44,7 @@ char *op_name_from_perf_id(void) return NULL; } } +#endif static int report_trace(struct stackframe *frame, void *d) { @@ -111,6 +110,7 @@ static void arm_backtrace(struct pt_regs * const regs, unsigned int depth) int __init oprofile_arch_init(struct oprofile_operations *ops) { + /* provide backtrace support also in timer mode: */ ops->backtrace = arm_backtrace; return oprofile_perf_init(ops); @@ -120,11 +120,3 @@ void __exit oprofile_arch_exit(void) { oprofile_perf_exit(); } -#else -int __init oprofile_arch_init(struct oprofile_operations *ops) -{ - pr_info("oprofile: hardware counters not available\n"); - return -ENODEV; -} -void __exit oprofile_arch_exit(void) {} -#endif /* CONFIG_HW_PERF_EVENTS */ diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 123608531c8f933b819a3fc7c135748137c8eb5b..7038b95d363f267eba1c7ccb13e8d3f382892837 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -671,7 +671,7 @@ void __kprobes text_poke_smp_batch(struct text_poke_param *params, int n) atomic_set(&stop_machine_first, 1); wrote_text = 0; - stop_machine(stop_machine_text_poke, (void *)&tpp, NULL); + __stop_machine(stop_machine_text_poke, (void *)&tpp, NULL); } #if defined(CONFIG_DYNAMIC_FTRACE) || defined(HAVE_JUMP_LABEL) diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h index 32fb81212fd153c0a71ba347ead6429d0a8dcd06..1ca64113efe866ccaf992d259849a90fb55c5e3a 100644 --- a/include/linux/oprofile.h +++ b/include/linux/oprofile.h @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include /* Each escaped entry is prefixed by ESCAPE_CODE @@ -186,10 +188,17 @@ int oprofile_add_data(struct op_entry *entry, unsigned long val); int oprofile_add_data64(struct op_entry *entry, u64 val); int oprofile_write_commit(struct op_entry *entry); -#ifdef CONFIG_PERF_EVENTS +#ifdef CONFIG_HW_PERF_EVENTS int __init oprofile_perf_init(struct oprofile_operations *ops); void oprofile_perf_exit(void); char *op_name_from_perf_id(void); -#endif /* CONFIG_PERF_EVENTS */ +#else +static inline int __init oprofile_perf_init(struct oprofile_operations *ops) +{ + pr_info("oprofile: hardware counters not available\n"); + return -ENODEV; +} +static inline void oprofile_perf_exit(void) { } +#endif /* CONFIG_HW_PERF_EVENTS */ #endif /* OPROFILE_H */ diff --git a/kernel/watchdog.c b/kernel/watchdog.c index f37f974aa81b503aabad7e6fc479494e86325a06..18bb15776c57162b60675adf69e7afd765b34fb0 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -363,8 +363,14 @@ static int watchdog_nmi_enable(int cpu) goto out_save; } - printk(KERN_ERR "NMI watchdog disabled for cpu%i: unable to create perf event: %ld\n", - cpu, PTR_ERR(event)); + + /* vary the KERN level based on the returned errno */ + if (PTR_ERR(event) == -EOPNOTSUPP) + printk(KERN_INFO "NMI watchdog disabled (cpu%i): not supported (no LAPIC?)\n", cpu); + else if (PTR_ERR(event) == -ENOENT) + printk(KERN_WARNING "NMI watchdog disabled (cpu%i): hardware events not enabled\n", cpu); + else + printk(KERN_ERR "NMI watchdog disabled (cpu%i): unable to create perf event: %ld\n", cpu, PTR_ERR(event)); return PTR_ERR(event); /* success path */ diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index b2f729fdb317e36c9677c9b058818a7b7e1bc378..60cac6f92e8b8d17bf165a6a592c6653f6141a96 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -759,8 +759,8 @@ static int __cmd_record(int argc, const char **argv) perf_session__process_machines(session, event__synthesize_guest_os); if (!system_wide) - event__synthesize_thread(target_tid, process_synthesized_event, - session); + event__synthesize_thread_map(threads, process_synthesized_event, + session); else event__synthesize_threads(process_synthesized_event, session); diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index b6998e055767fd68b9d70d2462d6776238fe4e85..5a29d9cd948621a9e357c27a156baa3bff8b5556 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1306,7 +1306,7 @@ static int __cmd_top(void) return -ENOMEM; if (target_tid != -1) - event__synthesize_thread(target_tid, event__process, session); + event__synthesize_thread_map(threads, event__process, session); else event__synthesize_threads(event__process, session); diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 1478ab4ee2221e8dc5d44cd6677bf56e0d79205d..50d0a931497abbdc0151ca4b0a3a040b88c1b036 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -263,11 +263,12 @@ static int __event__synthesize_thread(event_t *comm_event, event_t *mmap_event, process, session); } -int event__synthesize_thread(pid_t pid, event__handler_t process, - struct perf_session *session) +int event__synthesize_thread_map(struct thread_map *threads, + event__handler_t process, + struct perf_session *session) { event_t *comm_event, *mmap_event; - int err = -1; + int err = -1, thread; comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size); if (comm_event == NULL) @@ -277,8 +278,15 @@ int event__synthesize_thread(pid_t pid, event__handler_t process, if (mmap_event == NULL) goto out_free_comm; - err = __event__synthesize_thread(comm_event, mmap_event, pid, - process, session); + err = 0; + for (thread = 0; thread < threads->nr; ++thread) { + if (__event__synthesize_thread(comm_event, mmap_event, + threads->map[thread], + process, session)) { + err = -1; + break; + } + } free(mmap_event); out_free_comm: free(comm_event); diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 2b7e91902f105d5962a68254737ce21cfeef935c..cc7b52f9b49265cf4097a3154568fb850f55cc60 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -135,14 +135,16 @@ typedef union event_union { void event__print_totals(void); struct perf_session; +struct thread_map; typedef int (*event__handler_synth_t)(event_t *event, struct perf_session *session); typedef int (*event__handler_t)(event_t *event, struct sample_data *sample, struct perf_session *session); -int event__synthesize_thread(pid_t pid, event__handler_t process, - struct perf_session *session); +int event__synthesize_thread_map(struct thread_map *threads, + event__handler_t process, + struct perf_session *session); int event__synthesize_threads(event__handler_t process, struct perf_session *session); int event__synthesize_kernel_mmap(event__handler_t process,