Untangle IA64 sync_icache_dcache() page size determination

[Christoph Lameter <clameter@xxxxxxx>]

From: Christoph Lameter <clameter@xxxxxxx>
Subject: Untangle IA64 sync_icache_dcache() page size determination

Untangle the chaos of page size determination in this function by
simply using PAGE_SIZE << compound_order().

Cc: linux-ia64@xxxxxxxxxxxxxxx
Cc: tony.luck@xxxxxxxxx
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>

---
 arch/ia64/mm/init.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

Index: linux-2.6.25-rc5-mm1/arch/ia64/mm/init.c
===================================================================
--- linux-2.6.25-rc5-mm1.orig/arch/ia64/mm/init.c	2008-03-26 20:10:58.396670095 -0700
+++ linux-2.6.25-rc5-mm1/arch/ia64/mm/init.c	2008-03-26 20:11:33.509168639 -0700
@@ -66,12 +66,7 @@ __ia64_sync_icache_dcache (pte_t pte)
 	if (test_bit(PG_arch_1, &page->flags))
 		return;				/* i-cache is already coherent with d-cache */
 
-	if (PageCompound(page)) {
-		order = compound_order(page);
-		flush_icache_range(addr, addr + (1UL << order << PAGE_SHIFT));
-	}
-	else
-		flush_icache_range(addr, addr + PAGE_SIZE);
+	flush_icache_range(addr, addr + (PAGE_SIZE << compound_order(page)));
 	set_bit(PG_arch_1, &page->flags);	/* mark page as clean */
 }
 
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