diff options
| author | Wen Congyang <[email protected]> | 2012-09-20 14:04:47 +0800 |
|---|---|---|
| committer | Steven Rostedt <[email protected]> | 2012-09-20 15:51:16 -0400 |
| commit | 85f2a2ef1d0ab99523e0b947a2b723f5650ed6aa (patch) | |
| tree | be9256de42d2f2411355858fccb3c58aac8c5381 | |
| parent | 20a36e39d59757252edbbdcf9574ae2998733ce9 (diff) | |
tracing: Don't call page_to_pfn() if page is NULL
When allocating memory fails, page is NULL. page_to_pfn() will
cause the kernel panicked if we don't use sparsemem vmemmap.
Link: http://lkml.kernel.org/r/[email protected]
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: stable <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Reviewed-by: Minchan Kim <[email protected]>
Signed-off-by: Wen Congyang <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
| -rw-r--r-- | include/trace/events/kmem.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index 5f889f16b0c8..08fa27244da7 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -214,7 +214,7 @@ TRACE_EVENT(mm_page_alloc, TP_printk("page=%p pfn=%lu order=%d migratetype=%d gfp_flags=%s", __entry->page, - page_to_pfn(__entry->page), + __entry->page ? page_to_pfn(__entry->page) : 0, __entry->order, __entry->migratetype, show_gfp_flags(__entry->gfp_flags)) @@ -240,7 +240,7 @@ DECLARE_EVENT_CLASS(mm_page, TP_printk("page=%p pfn=%lu order=%u migratetype=%d percpu_refill=%d", __entry->page, - page_to_pfn(__entry->page), + __entry->page ? page_to_pfn(__entry->page) : 0, __entry->order, __entry->migratetype, __entry->order == 0) |