linux-kernel - [2.6 patch] mm/hugetlb.c: fix duplicate variable

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Message-ID: <20080421225020.GH2633@cs181133002.pp.htv.fi>
Date:	Tue, 22 Apr 2008 01:50:20 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	wli@...omorphy.com
Cc:	linux-kernel@...r.kernel.org
Subject: [2.6 patch] mm/hugetlb.c: fix duplicate variable

It's confusing that set_max_huge_pages() contained two different 
variables named "ret", and although the code works correctly this should 
be fixed.

The inner of the two variables can simply be removed.

Spotted by sparse.

Signed-off-by: Adrian Bunk <bunk@...nel.org>

---

This patch has been sent on:
- 14 Apr 2008
- 31 Mar 2008
- 25 Feb 2008

 mm/hugetlb.c |    1 -
 1 file changed, 1 deletion(-)

--- linux-2.6/mm/hugetlb.c.old	2008-02-24 23:17:52.000000000 +0200
+++ linux-2.6/mm/hugetlb.c	2008-02-24 23:26:07.000000000 +0200
@@ -518,45 +518,44 @@
 static unsigned long set_max_huge_pages(unsigned long count)
 {
 	unsigned long min_count, ret;

 	/*
 	 * Increase the pool size
 	 * First take pages out of surplus state.  Then make up the
 	 * remaining difference by allocating fresh huge pages.
 	 *
 	 * We might race with alloc_buddy_huge_page() here and be unable
 	 * to convert a surplus huge page to a normal huge page. That is
 	 * not critical, though, it just means the overall size of the
 	 * pool might be one hugepage larger than it needs to be, but
 	 * within all the constraints specified by the sysctls.
 	 */
 	spin_lock(&hugetlb_lock);
 	while (surplus_huge_pages && count > persistent_huge_pages) {
 		if (!adjust_pool_surplus(-1))
 			break;
 	}

 	while (count > persistent_huge_pages) {
-		int ret;
 		/*
 		 * If this allocation races such that we no longer need the
 		 * page, free_huge_page will handle it by freeing the page
 		 * and reducing the surplus.
 		 */
 		spin_unlock(&hugetlb_lock);
 		ret = alloc_fresh_huge_page();
 		spin_lock(&hugetlb_lock);
 		if (!ret)
 			goto out;

 	}

 	/*
 	 * Decrease the pool size
 	 * First return free pages to the buddy allocator (being careful
 	 * to keep enough around to satisfy reservations).  Then place
 	 * pages into surplus state as needed so the pool will shrink
 	 * to the desired size as pages become free.
 	 *
 	 * By placing pages into the surplus state independent of the
 	 * overcommit value, we are allowing the surplus pool size to

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