patch-2.4.17 linux/mm/vmalloc.c

• Lines: 52
• Date: Fri Dec 21 16:40:33 2001
• Orig file: linux-2.4.16/mm/vmalloc.c
• Orig date: Mon Sep 17 20:16:31 2001

diff -Naur -X /home/marcelo/lib/dontdiff linux-2.4.16/mm/vmalloc.c linux/mm/vmalloc.c
@@ -6,6 +6,7 @@
  *  SMP-safe vmalloc/vfree/ioremap, Tigran Aivazian <tigran@veritas.com>, May 2000
  */
 
+#include <linux/config.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/spinlock.h>
@@ -273,6 +274,43 @@
 			if (count == 0)
 				goto finished;
 			*buf = *addr;
+			buf++;
+			addr++;
+			count--;
+		} while (--n > 0);
+	}
+finished:
+	read_unlock(&vmlist_lock);
+	return buf - buf_start;
+}
+
+long vwrite(char *buf, char *addr, unsigned long count)
+{
+	struct vm_struct *tmp;
+	char *vaddr, *buf_start = buf;
+	unsigned long n;
+
+	/* Don't allow overflow */
+	if ((unsigned long) addr + count < count)
+		count = -(unsigned long) addr;
+
+	read_lock(&vmlist_lock);
+	for (tmp = vmlist; tmp; tmp = tmp->next) {
+		vaddr = (char *) tmp->addr;
+		if (addr >= vaddr + tmp->size - PAGE_SIZE)
+			continue;
+		while (addr < vaddr) {
+			if (count == 0)
+				goto finished;
+			buf++;
+			addr++;
+			count--;
+		}
+		n = vaddr + tmp->size - PAGE_SIZE - addr;
+		do {
+			if (count == 0)
+				goto finished;
+			*addr = *buf;
 			buf++;
 			addr++;
 			count--;