patch-2.2.18 linux/arch/i386/mm/ioremap.c

• Lines: 20
• Date: Thu Dec 7 15:03:54 2000
• Orig file: v2.2.17/arch/i386/mm/ioremap.c
• Orig date: Fri Apr 21 12:45:46 2000

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/arch/i386/mm/ioremap.c linux/arch/i386/mm/ioremap.c
@@ -110,7 +110,18 @@
 	 * Don't allow anybody to remap normal RAM that we're using..
 	 */
 	if (phys_addr < virt_to_phys(high_memory))
-		return NULL;
+           {
+		char *temp_addr, *temp_end;
+		int i;
+
+		temp_addr = __va(phys_addr);
+		temp_end = temp_addr + (size - 1);
+	      
+		for(i = MAP_NR(temp_addr); i <= MAP_NR(temp_end); i++) {
+			if(!PageReserved(mem_map + i))
+				return NULL;
+		}
+	   }
 
 	/*
 	 * Mappings have to be page-aligned