From 8308eb1f7a8f77840c80afb1b0a3172837780f18 Mon Sep 17 00:00:00 2001
From: yamt <yamt@NetBSD.org>
Date: Sun, 25 Jun 2006 08:10:04 +0000
Subject: [PATCH] implement kmem_zalloc.

---
 sys/kern/subr_kmem.c | 22 ++++++++++++++++++++--
 sys/sys/kmem.h       |  3 ++-
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/sys/kern/subr_kmem.c b/sys/kern/subr_kmem.c
index 3028a88c07e3..a391268e4b85 100644
--- a/sys/kern/subr_kmem.c
+++ b/sys/kern/subr_kmem.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: subr_kmem.c,v 1.1 2006/06/25 08:00:01 yamt Exp $	*/
+/*	$NetBSD: subr_kmem.c,v 1.2 2006/06/25 08:10:04 yamt Exp $	*/
 
 /*-
  * Copyright (c)2006 YAMAMOTO Takashi,
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_kmem.c,v 1.1 2006/06/25 08:00:01 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_kmem.c,v 1.2 2006/06/25 08:10:04 yamt Exp $");
 
 #include <sys/param.h>
 #include <sys/kmem.h>
@@ -85,6 +85,24 @@ kmem_alloc(size_t size, km_flag_t kmflags)
 	    kmf_to_vmf(kmflags) | VM_INSTANTFIT);
 }
 
+/*
+ * kmem_zalloc: allocate wired memory.
+ *
+ * => must not be called from interrupt context.
+ */
+
+void *
+kmem_zalloc(size_t size, km_flag_t kmflags)
+{
+	void *p;
+
+	p = kmem_alloc(size, kmflags);
+	if (p != NULL) {
+		memset(p, 0, size);
+	}
+	return p;
+}
+
 /*
  * kmem_free: free wired memory allocated by kmem_alloc.
  *
diff --git a/sys/sys/kmem.h b/sys/sys/kmem.h
index 6057e5ee9947..1e89cc1aaaf8 100644
--- a/sys/sys/kmem.h
+++ b/sys/sys/kmem.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: kmem.h,v 1.1 2006/06/25 08:00:01 yamt Exp $	*/
+/*	$NetBSD: kmem.h,v 1.2 2006/06/25 08:10:04 yamt Exp $	*/
 
 /*-
  * Copyright (c)2006 YAMAMOTO Takashi,
@@ -34,6 +34,7 @@
 typedef unsigned int km_flag_t;
 
 void *kmem_alloc(size_t, km_flag_t);
+void *kmem_zalloc(size_t, km_flag_t);
 void kmem_free(void *, size_t);
 void kmem_init(void);
 size_t kmem_roundup_size(size_t);