From: Andi Kleen <ak@muc.de>
To: torvalds@transmeta.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] fix iounmap for non page aligned addresses
Date: Tue, 9 Jul 2002 13:55:34 +0200 [thread overview]
Message-ID: <20020709135534.A1155@averell> (raw)
Hi Linus,
This fixes a problem introduced by the pageattr ioremap/unmap patches.
iounmap lost the ability to free non page aligned addresses, which
are e.g. used by the bootflag code. This patch fixes this.
Also fix a potential off by one bug.
-Andi
--- linux-work/arch/i386/mm/ioremap.c.~2~ Tue Jun 18 02:13:09 2002
+++ linux/arch/i386/mm/ioremap.c Fri Jun 21 14:42:23 2002
@@ -213,9 +213,9 @@
void iounmap(void *addr)
{
struct vm_struct *p;
- if (addr < high_memory)
+ if (addr <= high_memory)
return;
- p = remove_kernel_area(addr);
+ p = remove_kernel_area(PAGE_MASK & (unsigned long) addr);
if (!p) {
printk("__iounmap: bad address %p\n", addr);
return;
next reply other threads:[~2002-07-09 11:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-09 11:55 Andi Kleen [this message]
2002-07-09 14:16 ` [PATCH] fix iounmap for non page aligned addresses Hugh Dickins
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