From a7b1a1a3089aaf1168e3b68a40e98532063d7811 Mon Sep 17 00:00:00 2001 From: Roman Zippel Date: Sun, 25 Jun 2006 05:46:55 -0700 Subject: [PATCH] [PATCH] m68k: fix __iounmap for 030 Ignore empty pmd entry during iomap (these are the holes between the mappings). Signed-off-by: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m68k/mm/kmap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c index 85ad19a0ac7..43ffab04872 100644 --- a/arch/m68k/mm/kmap.c +++ b/arch/m68k/mm/kmap.c @@ -259,13 +259,15 @@ void __iounmap(void *addr, unsigned long size) if (CPU_IS_020_OR_030) { int pmd_off = (virtaddr/PTRTREESIZE) & 15; + int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK; - if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) { + if (pmd_type == _PAGE_PRESENT) { pmd_dir->pmd[pmd_off] = 0; virtaddr += PTRTREESIZE; size -= PTRTREESIZE; continue; - } + } else if (pmd_type == 0) + continue; } if (pmd_bad(*pmd_dir)) { -- 2.41.0