From nobody Sun Feb 8 11:44:33 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE4FEC001DC for ; Sat, 22 Jul 2023 23:53:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229797AbjGVXxQ (ORCPT ); Sat, 22 Jul 2023 19:53:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229727AbjGVXxI (ORCPT ); Sat, 22 Jul 2023 19:53:08 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5AE90A0 for ; Sat, 22 Jul 2023 16:53:07 -0700 (PDT) Received: from workpc.. (109-252-150-127.dynamic.spd-mgts.ru [109.252.150.127]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dmitry.osipenko) by madras.collabora.co.uk (Postfix) with ESMTPSA id AC44566070F6; Sun, 23 Jul 2023 00:53:04 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1690069986; bh=DR/MzGr7Elx2maftKvgUdtGhebsMSg18JQ9dHQ1DW8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rq+fjdsd95PSjGkphpEnDZlaTlQRPQm9fW0EHT8LIWRZNyt1/F454tqzyvlillWYf FRJsMy9YcvRkYRAEx4ktTC9sE2rbfUg90Sp3tYhQx4dfs1YVbBmOCLFGankD2P8Z79 rbUE8os+AJllH8SyTM1Ui2az3ZLOTa/xzNlIMKlCQHkaChLgB+QW/eZsDLqOWk0WMZ G9MMBGhJjrqzV8I1Bf1wLpTkasJ1PqYqdFSZlWRk57YhiEBruNsIiCzsVQ64rZwPfe u/opHcemc4gznT46ICWOVm8UBk4adomOySAS4qOcA8MAW5GvVsN1eSQ3CmOibcwExJ 7gjTCinBMYGsQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?UTF-8?q?Christian=20K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, virtualization@lists.linux-foundation.org Subject: [PATCH v14 03/12] drm/shmem-helper: Switch drm_gem_shmem_vmap/vunmap to use pin/unpin Date: Sun, 23 Jul 2023 02:47:37 +0300 Message-ID: <20230722234746.205949-4-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230722234746.205949-1-dmitry.osipenko@collabora.com> References: <20230722234746.205949-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The vmapped pages shall be pinned in memory. Previously get/put pages were implicitly hard-pinning/unpinning the pages. This will no longer be the case with addition of memory shrinker because pages_use_count>0 won't determine anymore whether pages are hard-pinned (they will be soft-pinned), while the new pages_pin_count will do that. Switch the vmap/vunmap to use pin/unpin functions in a preparation of addition of the memory shrinker support. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_g= em_shmem_helper.c index 42ba201dda50..c236ad835448 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -379,7 +379,7 @@ int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shm= em, return 0; } =20 - ret =3D drm_gem_shmem_get_pages(shmem); + ret =3D drm_gem_shmem_pin_locked(shmem); if (ret) goto err_zero_use; =20 @@ -402,7 +402,7 @@ int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shm= em, =20 err_put_pages: if (!obj->import_attach) - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_unpin_locked(shmem); err_zero_use: shmem->vmap_use_count =3D 0; =20 @@ -439,7 +439,7 @@ void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *= shmem, return; =20 vunmap(shmem->vaddr); - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_unpin_locked(shmem); } =20 shmem->vaddr =3D NULL; --=20 2.41.0