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[PATCH] m68k: fix __iounmap for 030 

Ignore empty pmd entry during iomap (these are the holes between the
mappings).

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roman Zippel 2006-06-25 05:46:55 -07:00 committed by Linus Torvalds
parent 6bf9f755c3
commit a7b1a1a308
1 changed files with 4 additions and 2 deletions
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6
arch/m68k/mm/kmap.c
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@ -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)) {