From patchwork Sat Apr 4 09:40:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11474153 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 760F681 for ; Sat, 4 Apr 2020 09:41:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B6392076C for ; Sat, 4 Apr 2020 09:41:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="E5rDDKMw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726222AbgDDJlV (ORCPT ); Sat, 4 Apr 2020 05:41:21 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:37216 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725730AbgDDJlV (ORCPT ); Sat, 4 Apr 2020 05:41:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=FjP6zoayZ1fjLTQ5J40k73xEcDLUAFsLpp9ITbvNuIc=; b=E5rDDKMwWfrap1JfG6yNklw4O2 GNgNgDdFmbxfo1fUVp5J1gaGFscM2Apu4SX2zjRhB1+YnuUkrq4wHrSoK6KStx9kPDNIH/ANmeneN wQ02zm0tKQ1R6ebfTq6wzZkFEMzwXBcqrmfyGf8xA5tZRYW83fb+mtQ8J+8dagGuRpquxFp/Q68nq FW1kAC2RNliuc7Tp/7ADj02HUyYGYkHXUO6rqnrjgGwA1crPkLp/2s+nq7pS6OYTuy64eguvFMaLD xOAvUjLwiu/DrMQZbyP3jl7d3qekyjoqtsaLSBWrrQVdwUV+JywA4azyO0oEnsF6xvSa20P+kDcLL Ntn9iIgQ==; Received: from [2001:4bb8:180:7914:2ca6:9476:bbfa:a4d0] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jKfIc-0002d1-GL; Sat, 04 Apr 2020 09:41:11 +0000 From: Christoph Hellwig To: Linus Torvalds , Andrew Morton Cc: Al Viro , Felix Kuehling , Alex Deucher , Zhenyu Wang , Zhi Wang , Felipe Balbi , "Michael S. Tsirkin" , Jason Wang , Jens Axboe , linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-usb@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 2/6] i915/gvt/kvm: a NULL ->mm does not mean a thread is a kthread Date: Sat, 4 Apr 2020 11:40:57 +0200 Message-Id: <20200404094101.672954-3-hch@lst.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200404094101.672954-1-hch@lst.de> References: <20200404094101.672954-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Use the proper API instead. Fixes: f440c8a572d7 ("drm/i915/gvt/kvmgt: read/write GPA via KVM API") Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 074c4efb58eb..5848400620b4 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -2037,7 +2037,7 @@ static int kvmgt_rw_gpa(unsigned long handle, unsigned long gpa, struct kvmgt_guest_info *info; struct kvm *kvm; int idx, ret; - bool kthread = current->mm == NULL; + bool kthread = (current->flags & PF_KTHREAD); if (!handle_valid(handle)) return -ESRCH;