linux-kernel - [PATCH] mm: mminit_validate_memmodel_limits

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Date:	Tue, 6 Jan 2009 15:12:13 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Christoph Lameter <cl@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Pekka Enberg <penberg@...helsinki.fi>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: mminit_validate_memmodel_limits - get rid of redundant
	test

In case if start_pfn overlap the upper bound no need
to test end_pfn again since we have it already trimmed.

Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
---

I hope this time I don't miss anything.

 mm/sparse.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Index: linux-2.6.git/mm/sparse.c
===================================================================
--- linux-2.6.git.orig/mm/sparse.c
+++ linux-2.6.git/mm/sparse.c
@@ -164,9 +164,7 @@ void __meminit mminit_validate_memmodel_
 		WARN_ON_ONCE(1);
 		*start_pfn = max_sparsemem_pfn;
 		*end_pfn = max_sparsemem_pfn;
-	}
-
-	if (*end_pfn > max_sparsemem_pfn) {
+	} else if (*end_pfn > max_sparsemem_pfn) {
 		mminit_dprintk(MMINIT_WARNING, "pfnvalidation",
 			"End of range %lu -> %lu exceeds SPARSEMEM max %lu\n",
 			*start_pfn, *end_pfn, max_sparsemem_pfn);
--
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