linux-kernel - [PATCH 3/3 -next] xen: fix build when SYSRQ is disabled

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Date:	Thu, 25 Mar 2010 11:29:32 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Jeremy Fitzhardinge <jeremy@...source.com>,
	Chris Wright <chrisw@...s-sol.org>
Subject: [PATCH 3/3 -next] xen: fix build when SYSRQ is disabled

From: Randy Dunlap <randy.dunlap@...cle.com>

Fix build error when CONFIG_MAGIC_SYSRQ is not enabled:

drivers/xen/manage.c:223: error: implicit declaration of function 'handle_sysrq'

Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
Cc: Jeremy Fitzhardinge <jeremy@...source.com>
Cc: Chris Wright <chrisw@...s-sol.org>
---
 drivers/xen/manage.c |   14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

--- linux-next-20100325.orig/drivers/xen/manage.c
+++ linux-next-20100325/drivers/xen/manage.c
@@ -194,6 +194,7 @@ static void shutdown_handler(struct xenb
 	kfree(str);
 }
 
+#ifdef CONFIG_MAGIC_SYSRQ
 static void sysrq_handler(struct xenbus_watch *watch, const char **vec,
 			  unsigned int len)
 {
@@ -223,15 +224,16 @@ static void sysrq_handler(struct xenbus_
 		handle_sysrq(sysrq_key, NULL);
 }
 
-static struct xenbus_watch shutdown_watch = {
-	.node = "control/shutdown",
-	.callback = shutdown_handler
-};
-
 static struct xenbus_watch sysrq_watch = {
 	.node = "control/sysrq",
 	.callback = sysrq_handler
 };
+#endif
+
+static struct xenbus_watch shutdown_watch = {
+	.node = "control/shutdown",
+	.callback = shutdown_handler
+};
 
 static int setup_shutdown_watcher(void)
 {
@@ -243,11 +245,13 @@ static int setup_shutdown_watcher(void)
 		return err;
 	}
 
+#ifdef CONFIG_MAGIC_SYSRQ
 	err = register_xenbus_watch(&sysrq_watch);
 	if (err) {
 		printk(KERN_ERR "Failed to set sysrq watcher\n");
 		return err;
 	}
+#endif
 
 	return 0;
 }
--
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