diff options
Diffstat (limited to 'kernel/events')
-rw-r--r-- | kernel/events/internal.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/kernel/events/internal.h b/kernel/events/internal.h index 2417eb5512cd..486fd78eb8d5 100644 --- a/kernel/events/internal.h +++ b/kernel/events/internal.h @@ -123,18 +123,19 @@ static inline unsigned long perf_aux_size(struct ring_buffer *rb) return rb->aux_nr_pages << PAGE_SHIFT; } -#define __DEFINE_OUTPUT_COPY_BODY(memcpy_func) \ +#define __DEFINE_OUTPUT_COPY_BODY(advance_buf, memcpy_func, ...) \ { \ unsigned long size, written; \ \ do { \ size = min(handle->size, len); \ - written = memcpy_func(handle->addr, buf, size); \ + written = memcpy_func(__VA_ARGS__); \ written = size - written; \ \ len -= written; \ handle->addr += written; \ - buf += written; \ + if (advance_buf) \ + buf += written; \ handle->size -= written; \ if (!handle->size) { \ struct ring_buffer *rb = handle->rb; \ @@ -153,12 +154,16 @@ static inline unsigned long perf_aux_size(struct ring_buffer *rb) static inline unsigned long \ func_name(struct perf_output_handle *handle, \ const void *buf, unsigned long len) \ -__DEFINE_OUTPUT_COPY_BODY(memcpy_func) +__DEFINE_OUTPUT_COPY_BODY(true, memcpy_func, handle->addr, buf, size) static inline unsigned long __output_custom(struct perf_output_handle *handle, perf_copy_f copy_func, const void *buf, unsigned long len) -__DEFINE_OUTPUT_COPY_BODY(copy_func) +{ + unsigned long orig_len = len; + __DEFINE_OUTPUT_COPY_BODY(false, copy_func, handle->addr, buf, + orig_len - len, size) +} static inline unsigned long memcpy_common(void *dst, const void *src, unsigned long n) |