patch-2.1.97 linux/arch/sparc64/mm/modutil.c

• Lines: 52
• Date: Tue Apr 14 17:44:21 1998
• Orig file: v2.1.96/linux/arch/sparc64/mm/modutil.c
• Orig date: Mon Jul 7 08:18:55 1997

diff -u --recursive --new-file v2.1.96/linux/arch/sparc64/mm/modutil.c linux/arch/sparc64/mm/modutil.c
@@ -1,7 +1,7 @@
-/*  $Id: modutil.c,v 1.1 1997/06/27 14:53:35 jj Exp $
+/*  $Id: modutil.c,v 1.3 1998/01/16 16:35:02 jj Exp $
  *  arch/sparc64/mm/modutil.c
  *
- *  Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ *  Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  *  Based upon code written by Linus Torvalds and others.
  */
  
@@ -21,7 +21,7 @@
 	if (!addr)
 		return;
 	if ((PAGE_SIZE-1) & (unsigned long) addr) {
-		printk("Trying to vfree() bad address (%p)\n", addr);
+		printk("Trying to unmap module with bad address (%p)\n", addr);
 		return;
 	}
 	for (p = &modvmlist ; (tmp = *p) ; p = &tmp->next) {
@@ -33,6 +33,32 @@
 		}
 	}
 	printk("Trying to unmap nonexistent module vm area (%p)\n", addr);
+}
+
+void module_shrink(void * addr, unsigned long size)
+{
+	struct vm_struct *tmp;
+
+	if (!addr)
+		return;
+	if ((PAGE_SIZE-1) & (unsigned long) addr) {
+		printk("Trying to shrink module with bad address (%p)\n", addr);
+		return;
+	}
+	size = PAGE_ALIGN(size);
+	if (!size)
+		module_unmap(addr);
+	for (tmp = modvmlist; tmp; tmp = tmp->next) {
+		if (tmp->addr == addr) {
+			if (size > tmp->size - PAGE_SIZE) {
+				printk("Trying to expand module with module_shrink()\n");
+				return;
+			}
+			vmfree_area_pages(VMALLOC_VMADDR(tmp->addr)+size, tmp->size-size);
+			return;
+		}
+	}
+	printk("Trying to shrink nonexistent module vm area (%p)\n", addr);
 }
 
 void * module_map (unsigned long size)