From 468c30f2bbdf1ba0fbf16667eade23a46eaa8f06 Mon Sep 17 00:00:00 2001 From: Florian Zumbiehl Date: Tue, 20 Jul 2010 15:19:47 -0700 Subject: [PATCH] x86, iomap: Fix wrong page aligned size calculation in ioremapping code x86 early_iounmap(): fix off-by-one error in page alignment of allocation size for sizes where size%PAGE_SIZE==1. Signed-off-by: Florian Zumbiehl LKML-Reference: <201007202219.o6KMJlES021058@imap1.linux-foundation.org> Signed-off-by: Andrew Morton Signed-off-by: H. Peter Anvin --- arch/x86/mm/ioremap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index d41d3a9036ca..3ba6e0608c55 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -611,7 +611,7 @@ void __init early_iounmap(void __iomem *addr, unsigned long size) return; } offset = virt_addr & ~PAGE_MASK; - nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT; + nrpages = PAGE_ALIGN(offset + size) >> PAGE_SHIFT; idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot; while (nrpages > 0) { -- 2.20.1