linux-kernel - [PATCH] flush icache before set_pte() on ia64 take9 [1/2] migration fix

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Message-Id: <20070809135608.ff3b0373.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 9 Aug 2007 13:56:08 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"tony.luck@...el.com" <tony.luck@...el.com>, davem@...emloft.net,
	"Zoltan.Menyhart@...l.net" <Zoltan.Menyhart@...l.net>,
	"nickpiggin@...oo.com.au" <nickpiggin@...oo.com.au>
Subject: [PATCH] flush icache before set_pte() on ia64  take9 [1/2]
 migration fix

In migration, a new page should be cache flushed before set_pte()
in some archs which have virtually-tagged cache..
I'll separate this from patch set in the next time.


Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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

Index: linux-2.6.23-rc2.test/mm/migrate.c
===================================================================
--- linux-2.6.23-rc2.test.orig/mm/migrate.c
+++ linux-2.6.23-rc2.test/mm/migrate.c
@@ -171,6 +171,7 @@ 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_cache_page(vma, addr, pte_pfn(pte));
 	set_pte_at(mm, addr, ptep, pte);
 
 	if (PageAnon(new))

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