tracing: Don't call page_to_pfn() if page is NULL
authorWen Congyang <wency@cn.fujitsu.com>
Thu, 20 Sep 2012 06:04:47 +0000 (14:04 +0800)
committerSteven Rostedt <rostedt@goodmis.org>
Thu, 20 Sep 2012 19:51:16 +0000 (15:51 -0400)
commit85f2a2ef1d0ab99523e0b947a2b723f5650ed6aa
treebe9256de42d2f2411355858fccb3c58aac8c5381
parent20a36e39d59757252edbbdcf9574ae2998733ce9
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/505AB1FF.8020104@cn.fujitsu.com

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: stable <stable@vger.kernel.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
include/trace/events/kmem.h