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writeback: Add tracing to write_cache_pages
[firefly-linux-kernel-4.4.55.git]
/
mm
/
page-writeback.c
diff --git
a/mm/page-writeback.c
b/mm/page-writeback.c
index d556cd829af66ab6431334bafb2d5b1e8a583334..3d2111a2223633d817ccbd6714fcd994509f1ca8 100644
(file)
--- a/
mm/page-writeback.c
+++ b/
mm/page-writeback.c
@@
-933,6
+933,7
@@
continue_unlock:
if (!clear_page_dirty_for_io(page))
goto continue_unlock;
+ trace_wbc_writepage(wbc, mapping->backing_dev_info);
ret = (*writepage)(page, wbc, data);
if (unlikely(ret)) {
if (ret == AOP_WRITEPAGE_ACTIVATE) {