linux-kernel - [PATCH] mm/page_isolation: fix tracepoint to mirror check function behavior

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Message-Id: <1458236456-465-1-git-send-email-l.stach@pengutronix.de>
Date:	Thu, 17 Mar 2016 18:40:56 +0100
From:	Lucas Stach <l.stach@...gutronix.de>
To:	Joonsoo Kim <js1304@...il.com>, linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	patchwork-lst@...gutronix.de
Subject: [PATCH] mm/page_isolation: fix tracepoint to mirror check function behavior

Page isolation has not failed if the fin pfn extends beyond the end pfn
and test_pages_isolated checks this correctly. Fix the tracepoint to
report the same result as the actual check function.

Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
---
 include/trace/events/page_isolation.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/trace/events/page_isolation.h b/include/trace/events/page_isolation.h
index 6fb644029c80..8738a78e6bf4 100644
--- a/include/trace/events/page_isolation.h
+++ b/include/trace/events/page_isolation.h
@@ -29,7 +29,7 @@ TRACE_EVENT(test_pages_isolated,
 
 	TP_printk("start_pfn=0x%lx end_pfn=0x%lx fin_pfn=0x%lx ret=%s",
 		__entry->start_pfn, __entry->end_pfn, __entry->fin_pfn,
-		__entry->end_pfn == __entry->fin_pfn ? "success" : "fail")
+		__entry->end_pfn <= __entry->fin_pfn ? "success" : "fail")
 );
 
 #endif /* _TRACE_PAGE_ISOLATION_H */
-- 
2.7.0