diff options
| -rw-r--r-- | include/linux/perf_event.h | 2 | ||||
| -rw-r--r-- | kernel/events/internal.h | 4 | ||||
| -rw-r--r-- | kernel/events/ring_buffer.c | 6 |
3 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index d41394a1af36..8a73f75beb16 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1321,6 +1321,8 @@ extern int perf_output_begin(struct perf_output_handle *handle, extern void perf_output_end(struct perf_output_handle *handle); extern unsigned int perf_output_copy(struct perf_output_handle *handle, const void *buf, unsigned int len); +extern unsigned int perf_output_skip(struct perf_output_handle *handle, + unsigned int len); extern int perf_swevent_get_recursion_context(void); extern void perf_swevent_put_recursion_context(int rctx); extern void perf_event_enable(struct perf_event *event); diff --git a/kernel/events/internal.h b/kernel/events/internal.h index 7fd5408493d2..ce7bdfc1d045 100644 --- a/kernel/events/internal.h +++ b/kernel/events/internal.h @@ -114,6 +114,10 @@ static inline int memcpy_common(void *dst, const void *src, size_t n) DEFINE_OUTPUT_COPY(__output_copy, memcpy_common) +#define MEMCPY_SKIP(dst, src, n) (n) + +DEFINE_OUTPUT_COPY(__output_skip, MEMCPY_SKIP) + #ifndef arch_perf_out_copy_user #define arch_perf_out_copy_user __copy_from_user_inatomic #endif diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c index b4c2ad3dee7a..23cb34ff3973 100644 --- a/kernel/events/ring_buffer.c +++ b/kernel/events/ring_buffer.c @@ -188,6 +188,12 @@ unsigned int perf_output_copy(struct perf_output_handle *handle, return __output_copy(handle, buf, len); } +unsigned int perf_output_skip(struct perf_output_handle *handle, + unsigned int len) +{ + return __output_skip(handle, NULL, len); +} + void perf_output_end(struct perf_output_handle *handle) { perf_output_put_handle(handle); |