[kvm-ppc-devel] [PATCH] kvmppc_sysrq: register our sysrq handler

[ehrhardt@linux.vnet.ibm.com]

Subject: [PATCH] kvmppc_sysrq: register our sysrq handler

From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

At the moment the existing patch adds handler and the ops structure
but does not use it in any way. This patch adds the needed call to
register_sysrq_key to be able to actually use it.
Additionally a new ifdef prevents a warning about unused sysrq_kvm_op
in the case that CONFIG_MAGIC_SYSRQ is not sleected.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
---

 powerpc.c |    3 +++
 1 files changed, 3 insertions(+)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -981,6 +981,7 @@ static struct rchan_callbacks relay_call
         .remove_buf_file = remove_buf_file_handler,
 };
 
+#ifdef CONFIG_MAGIC_SYSRQ
 static void sysrq_handle_kvm(int key, struct tty_struct *tty)
 {
        kvmppc_debug = !kvmppc_debug;
@@ -990,6 +991,7 @@ static struct sysrq_key_op sysrq_kvm_op 
        .help_msg       = "kVmppc debug",
        .action_msg     = "Enable KVM debugging",
 };
+#endif
 
 int kvm_arch_init(void *opaque)
 {
@@ -997,6 +999,11 @@ int kvm_arch_init(void *opaque)
 	                                 &relay_callbacks, NULL);
 	if (!kvmppc_44x_tlb_chan)
 		printk("relay_open failed\n");
+
+#ifdef CONFIG_MAGIC_SYSRQ
+	printk("Registering kvmppc sysrq handler\n");
+	register_sysrq_key('V', &sysrq_kvm_op);
+#endif
 
 	return 0;
 }

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