[PATCH 03/21] fix __iounmap for 030

[zippel@linux-m68k.org]

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

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>

---

 arch/m68k/mm/kmap.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

2a02d299d6158fb1cba1a2e7f0a446619db91648
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 85ad19a..43ffab0 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -259,13 +259,15 @@ void __iounmap(void *addr, unsigned long
 
 		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)) {
-- 
1.3.3

--

-
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