From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 4 Feb 2008 15:48:05 +0000 (+0100)
Subject: x86: ioremap remove the range check of cpa
X-Git-Tag: v2.6.25-rc1~1057^2~29
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75ab43bfce51085ffd627c470f48ae49ba6e6da3;p=linux-2.6

x86: ioremap remove the range check of cpa

Now that cpa works on non-direct mappings as well, we can safely
remove the range check in ioremap_change_attr().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 2c3fa71895..4e21231a5c 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -70,25 +70,12 @@ int page_is_ram(unsigned long pagenr)
  * Fix up the linear direct mapping of the kernel to avoid cache attribute
  * conflicts.
  */
-static int ioremap_change_attr(unsigned long paddr, unsigned long size,
+static int ioremap_change_attr(unsigned long vaddr, unsigned long size,
 			       enum ioremap_mode mode)
 {
-	unsigned long vaddr = (unsigned long)__va(paddr);
 	unsigned long nrpages = size >> PAGE_SHIFT;
-	unsigned int level;
 	int err;
 
-	/* No change for pages after the last mapping */
-	if ((paddr + size - 1) >= (max_pfn_mapped << PAGE_SHIFT))
-		return 0;
-
-	/*
-	 * If there is no identity map for this address,
-	 * change_page_attr_addr is unnecessary
-	 */
-	if (!lookup_address(vaddr, &level))
-		return 0;
-
 	switch (mode) {
 	case IOR_MODE_UNCACHED:
 	default:
@@ -169,7 +156,7 @@ static void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
 		return NULL;
 	}
 
-	if (ioremap_change_attr(phys_addr, size, mode) < 0) {
+	if (ioremap_change_attr(vaddr, size, mode) < 0) {
 		vunmap(area->addr);
 		return NULL;
 	}