X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsh%2Fmm%2Fpg-sh4.c;h=f6a76230872fb4da1b1f7e9189c8fdfce08f2149;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=07cbbd6c1a88a7b53de981f4802a526ed4eae246;hpb=db216c3d5e4c040e557a50f8f5d35d5c415e8c1c;p=linux-2.6.git

diff --git a/arch/sh/mm/pg-sh4.c b/arch/sh/mm/pg-sh4.c
index 07cbbd6c1..f6a762308 100644
--- a/arch/sh/mm/pg-sh4.c
+++ b/arch/sh/mm/pg-sh4.c
@@ -1,7 +1,5 @@
-/* 
- * $Id: pg-sh4.c,v 1.1.2.2 2002/11/17 17:56:18 lethal Exp $
- *
- *  arch/sh/mm/pg-sh4.c
+/*
+ * arch/sh/mm/pg-sh4.c
  *
  * Copyright (C) 1999, 2000, 2002  Niibe Yutaka
  * Copyright (C) 2002  Paul Mundt
@@ -101,3 +99,24 @@ void copy_user_page(void *to, void *from, unsigned long address,
 		up(&p3map_sem[(address & CACHE_ALIAS)>>12]);
 	}
 }
+
+/*
+ * For SH-4, we have our own implementation for ptep_get_and_clear
+ */
+inline pte_t ptep_get_and_clear(pte_t *ptep)
+{
+	pte_t pte = *ptep;
+
+	pte_clear(ptep);
+	if (!pte_not_present(pte)) {
+		unsigned long pfn = pte_pfn(pte);
+		if (pfn_valid(pfn)) {
+			struct page *page = pfn_to_page(pfn);
+			struct address_space *mapping = page_mapping(page);
+			if (!mapping || !mapping_writably_mapped(mapping))
+				__clear_bit(PG_mapped, &page->flags);
+		}
+	}
+	return pte;
+}
+