ring-buffer: reset write field for ring_buffer_read_page



Impact: fix ring_buffer_read_page

After a page is swapped into the ring buffer, the write field must
also be reset.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

parent 633ddaa7

kernel/trace/ring_buffer.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2492,6 +2492,7 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
		rb_init_page(bpage);
		bpage = cpu_buffer->reader_page->page;
		cpu_buffer->reader_page->page = *data_page;
		local_set(&cpu_buffer->reader_page->write, 0);
		cpu_buffer->reader_page->read = 0;
		*data_page = bpage;
		}