linux-kernel - [PATCH] flush cache fixes for ia64 [1/2] migration fix

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Message-Id: <20070727133843.6cd3f57a.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 27 Jul 2007 13:38:43 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	"tony.luck@...el.com" <tony.luck@...el.com>,
	"nickpiggin@...oo.com.au" <nickpiggin@...oo.com.au>,
	Zoltan.Menyhart@...l.net, Christoph Lameter <clameter@....com>
Subject: [PATCH] flush cache fixes for ia64 [1/2] migration fix

In migration, a new page should be cache flushed before set_pte()
in some archs.

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

---
 mm/migrate.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6.23-rc1.test/mm/migrate.c
===================================================================
--- linux-2.6.23-rc1.test.orig/mm/migrate.c
+++ linux-2.6.23-rc1.test/mm/migrate.c
@@ -172,6 +172,7 @@ static void remove_migration_pte(struct 
 	pte = pte_mkold(mk_pte(new, vma->vm_page_prot));
 	if (is_write_migration_entry(entry))
 		pte = pte_mkwrite(pte);
+	flush_icache_page(vma, new);
 	set_pte_at(mm, addr, ptep, pte);
 
 	if (PageAnon(new))

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