linux-kernel - [PATCH] stop c_p_a corrupting the pds

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Message-ID: <Pine.LNX.4.64.0802052218190.11822@blonde.site>
Date:	Tue, 5 Feb 2008 22:26:01 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] stop c_p_a corrupting the pds

When change_page_attr splits a large page on x86_32 (without PAE), it is
currently corrupting every process's page directory: fix that by removing
the thinko which passes down a physical instead of a virtual address.

Signed-off-by: Hugh Dickins <hugh@...itas.com>

--- 2.6.24-git/arch/x86/mm/pageattr.c	2008-02-05 16:43:45.000000000 +0000
+++ linux/arch/x86/mm/pageattr.c	2008-02-05 21:34:18.000000000 +0000
@@ -237,7 +237,6 @@ static void __set_pmd_pte(pte_t *kpte, u
 	if (!SHARED_KERNEL_PMD) {
 		struct page *page;
 
-		address = __pa(address);
 		list_for_each_entry(page, &pgd_list, lru) {
 			pgd_t *pgd;
 			pud_t *pud;
--
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