3.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Wen Congyang <[email protected]> commit 85f2a2ef1d0ab99523e0b947a2b723f5650ed6aa upstream. 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] Acked-by: Mel Gorman <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Andrew Morton <[email protected]> Reviewed-by: Minchan Kim <[email protected]> Signed-off-by: Wen Congyang <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- include/trace/events/kmem.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- 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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
