linux-kernel - [PATCH 1/5] Fix dubious bitwise 'or' usage spotted by sparse.

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Message-ID: <20090109234757.11800.1259.stgit@zaytsev.su>
Date:	Sat, 10 Jan 2009 02:47:57 +0300
From:	Alexey Zaytsev <alexey.zaytsev@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Trivial Kernel Patches <trivial@...nel.org>
Subject: [PATCH 1/5] Fix dubious bitwise 'or' usage spotted by sparse.

It doesn't change the semantics, but it looks like
the logical 'or' was meant to be used here.

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@...il.com>
---
 mm/page_alloc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d8ac014..6923237 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -306,7 +306,7 @@ static void destroy_compound_page(struct page *page, unsigned long order)
 	for (i = 1; i < nr_pages; i++) {
 		struct page *p = page + i;
 
-		if (unlikely(!PageTail(p) |
+		if (unlikely(!PageTail(p) ||
 				(p->first_page != page)))
 			bad_page(page);
 		__ClearPageTail(p);

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