linux-kernel - [tip:x86/urgent] x86, 32-bit: Fix double accounting in reserve_top

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Message-ID: <tip-6abf65510944d33b47575d151c6b318993c8d2b5@git.kernel.org>
Date:	Tue, 4 Aug 2009 15:32:14 GMT
From:	tip-bot for Jan Beulich <JBeulich@...ell.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	jbeulich@...ell.com, JBeulich@...ell.com, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:x86/urgent] x86, 32-bit: Fix double accounting in reserve_top_address()

Commit-ID:  6abf65510944d33b47575d151c6b318993c8d2b5
Gitweb:     http://git.kernel.org/tip/6abf65510944d33b47575d151c6b318993c8d2b5
Author:     Jan Beulich <JBeulich@...ell.com>
AuthorDate: Thu, 30 Jul 2009 16:49:30 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 4 Aug 2009 16:27:29 +0200

x86, 32-bit: Fix double accounting in reserve_top_address()

With VMALLOC_END included in the calculation of MAXMEM (as of
2.6.28) it is no longer correct to also bump __VMALLOC_RESERVE
in reserve_top_address(). Doing so results in needlessly small
lowmem.

Signed-off-by: Jan Beulich <jbeulich@...ell.com>
LKML-Reference: <4A71DD2A020000780000D482@....id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/mm/pgtable.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index af8f965..ed34f5e 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -329,7 +329,6 @@ void __init reserve_top_address(unsigned long reserve)
 	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
 	       (int)-reserve);
 	__FIXADDR_TOP = -reserve - PAGE_SIZE;
-	__VMALLOC_RESERVE += reserve;
 #endif
 }
 
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