linux-kernel - [PATCH v3 1/5] Drivers: hv: vmbus: remove hv_synic_free_cpu() call from hv_synic

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Message-Id: <1435226286-24842-2-git-send-email-vkuznets@redhat.com>
Date:	Thu, 25 Jun 2015 11:58:02 +0200
From:	Vitaly Kuznetsov <vkuznets@...hat.com>
To:	devel@...uxdriverproject.org
Cc:	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
	Eric Biederman <ebiederm@...ssion.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Olaf Hering <olaf@...fle.de>,
	Greg KH <gregkh@...uxfoundation.org>
Subject: [PATCH v3 1/5] Drivers: hv: vmbus: remove hv_synic_free_cpu() call from hv_synic_cleanup()

We already have hv_synic_free() which frees all per-cpu pages for all
CPUs, let's remove the hv_synic_free_cpu() call from hv_synic_cleanup()
so it will be possible to do separate cleanup (writing to MSRs) and final
freeing. This is going to be used to assist kexec.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
---
 drivers/hv/hv.c        | 2 --
 drivers/hv/vmbus_drv.c | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index d3943bc..5b87042 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -530,6 +530,4 @@ void hv_synic_cleanup(void *arg)
 	rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
 	sctrl.enable = 0;
 	wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
-
-	hv_synic_free_cpu(cpu);
 }
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index cf20400..00d5158 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1120,6 +1120,7 @@ static void __exit vmbus_exit(void)
 		tasklet_kill(hv_context.event_dpc[cpu]);
 		smp_call_function_single(cpu, hv_synic_cleanup, NULL, 1);
 	}
+	hv_synic_free();
 	acpi_bus_unregister_driver(&vmbus_acpi_driver);
 	hv_cpu_hotplug_quirk(false);
 }
-- 
2.4.2

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