Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

[mirror_ubuntu-hirsute-kernel.git] / include / linux / perf_event.h

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 79ec7bbf01557e523aee3ed263425b6fc3360741..78fda2a69ab86bd45b55eed2a5bc3a4ebd9bbe16 100644 (file)
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -966,11 +966,20 @@ DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
 
 extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs);
 extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs);
+extern struct perf_callchain_entry *
+get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
+                  bool crosstask, bool add_mark);
+extern int get_callchain_buffers(void);
+extern void put_callchain_buffers(void);
 
-static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip)
+static inline int perf_callchain_store(struct perf_callchain_entry *entry, u64 ip)
 {
-       if (entry->nr < PERF_MAX_STACK_DEPTH)
+       if (entry->nr < PERF_MAX_STACK_DEPTH) {
                entry->ip[entry->nr++] = ip;
+               return 0;
+       } else {
+               return -1; /* no more room, stop walking the stack */
+       }
 }
 
 extern int sysctl_perf_event_paranoid;