From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f180.google.com (mail-we0-f180.google.com [74.125.82.180]) by kanga.kvack.org (Postfix) with ESMTP id DAD206B006C for ; Thu, 12 Feb 2015 05:24:21 -0500 (EST) Received: by mail-we0-f180.google.com with SMTP id k11so9037030wes.11 for ; Thu, 12 Feb 2015 02:24:21 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id lo2si2151952wic.50.2015.02.12.02.24.19 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 12 Feb 2015 02:24:20 -0800 (PST) From: Vitaly Kuznetsov Subject: [PATCH RESEND 1/3] driver core: export lock_device_hotplug/unlock_device_hotplug Date: Thu, 12 Feb 2015 11:23:52 +0100 Message-Id: <1423736634-338-2-git-send-email-vkuznets@redhat.com> In-Reply-To: <1423736634-338-1-git-send-email-vkuznets@redhat.com> References: <1423736634-338-1-git-send-email-vkuznets@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , "K. Y. Srinivasan" , Haiyang Zhang , Andrew Morton , Yasuaki Ishimatsu , Tang Chen , Vlastimil Babka , David Rientjes , Fabian Frederick , Zhang Zhen , Vladimir Davydov , Wang Nan , "Rafael J. Wysocki" , devel@linuxdriverproject.org, linux-mm@kvack.org add_memory() is supposed to be run with device_hotplug_lock grabbed, otherwise it can race with e.g. device_online(). Allow external modules (hv_balloon for now) to lock device hotplug. Signed-off-by: Vitaly Kuznetsov --- drivers/base/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 97e2baf..b3073af 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -55,11 +55,13 @@ void lock_device_hotplug(void) { mutex_lock(&device_hotplug_lock); } +EXPORT_SYMBOL_GPL(lock_device_hotplug); void unlock_device_hotplug(void) { mutex_unlock(&device_hotplug_lock); } +EXPORT_SYMBOL_GPL(unlock_device_hotplug); int lock_device_hotplug_sysfs(void) { -- 1.9.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org