diff options
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 85749ae8cb5f..a090700cccca 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -58,7 +58,7 @@ struct perf_guest_info_callbacks { struct perf_callchain_entry { __u64 nr; - __u64 ip[PERF_MAX_STACK_DEPTH]; + __u64 ip[0]; /* /proc/sys/kernel/perf_event_max_stack */ }; struct perf_raw_record { @@ -993,9 +993,11 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user, extern int get_callchain_buffers(void); extern void put_callchain_buffers(void); +extern int sysctl_perf_event_max_stack; + static inline int perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) { - if (entry->nr < PERF_MAX_STACK_DEPTH) { + if (entry->nr < sysctl_perf_event_max_stack) { entry->ip[entry->nr++] = ip; return 0; } else { @@ -1017,6 +1019,8 @@ extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); +int perf_event_max_stack_handler(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos); static inline bool perf_paranoid_tracepoint_raw(void) { |