[zaptel-commits] trunk r1221 - /trunk/zttranscode.c

[zaptel-commits at lists.digium.com]

Author: kpfleming
Date: Wed Jul 12 20:52:31 2006
New Revision: 1221

URL: http://svn.digium.com/view/zaptel?rev=1221&view=rev
Log:
mark memory pages used by transcoder as reserved

Modified:
    trunk/zttranscode.c

Modified: trunk/zttranscode.c
URL: http://svn.digium.com/view/zaptel/trunk/zttranscode.c?rev=1221&r1=1220&r2=1221&view=diff
==============================================================================
--- trunk/zttranscode.c (original)
+++ trunk/zttranscode.c Wed Jul 12 20:52:31 2006
@@ -171,28 +171,30 @@
 {
 	struct zt_transcoder_channel *ztc;
 	struct zt_transcode_header *zth;
-
-	ztc = kmalloc(sizeof(*ztc), GFP_KERNEL);
-	zth = kmalloc(sizeof(*zth), GFP_KERNEL | GFP_DMA);
+	struct page *page;
+
+	if (!(ztc = kmalloc(sizeof(*ztc), GFP_KERNEL)))
+		return -ENOMEM;
+
+	if (!(zth = kmalloc(sizeof(*zth), GFP_KERNEL | GFP_DMA))) {
+		kfree(ztc);
+		return -ENOMEM;
+	}
 	
-	if (ztc && zth) {
-		memset(ztc, 0, sizeof(*ztc));
-		memset(zth, 0, sizeof(*zth));
-		ztc->flags = ZT_TC_FLAG_TRANSIENT|ZT_TC_FLAG_BUSY;
-		ztc->tch = zth;
-		if (debug)
-			printk("Allocated Transcoder Channel, header is at %p!\n", zth);
-		zth->magic = ZT_TRANSCODE_MAGIC;
-		file->private_data = ztc;
-
-		return 0;
-	}
-
-	if (ztc)
-		kfree(ztc);
-	if (zth)
-		kfree(zth);
-	return -ENOMEM;
+	memset(ztc, 0, sizeof(*ztc));
+	memset(zth, 0, sizeof(*zth));
+	ztc->flags = ZT_TC_FLAG_TRANSIENT | ZT_TC_FLAG_BUSY;
+	ztc->tch = zth;
+	if (debug)
+		printk("Allocated Transcoder Channel, header is at %p!\n", zth);
+	zth->magic = ZT_TRANSCODE_MAGIC;
+	file->private_data = ztc;
+	for (page = virt_to_page(zth);
+	     page < virt_to_page((unsigned long) zth + sizeof(*zth));
+	     page++)
+		SetPageReserved(page);
+
+	return 0;
 }
 
 static void ztc_release(struct zt_transcoder_channel *ztc)