linux-kernel - [PATCH v5 17/17] drm/shmem-helper: Remove drm_gem_shmem_purge

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Date:   Sun, 24 Apr 2022 22:04:24 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     David Airlie <airlied@...ux.ie>, Gerd Hoffmann <kraxel@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Daniel Almeida <daniel.almeida@...labora.com>,
        Gert Wollny <gert.wollny@...labora.com>,
        Gustavo Padovan <gustavo.padovan@...labora.com>,
        Daniel Stone <daniel@...ishbar.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Rob Herring <robh@...nel.org>,
        Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Rob Clark <robdclark@...il.com>,
        Emil Velikov <emil.l.velikov@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Qiang Yu <yuq825@...il.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Dmitry Osipenko <digetx@...il.com>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>
Subject: [PATCH v5 17/17] drm/shmem-helper: Remove drm_gem_shmem_purge_locked()

Panfrost driver was the only user of the drm_gem_shmem_purge_locked()
helper. Panfrost driver was converted to use new generic memory shrinker
and the helper doesn't have users anymore, remove it.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 30 --------------------------
 include/drm/drm_gem_shmem_helper.h     |  1 -
 2 files changed, 31 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 045921ad4795..ef7691c84fa8 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -899,36 +899,6 @@ static void drm_gem_shmem_unpin_pages_locked(struct drm_gem_shmem_object *shmem)
 	shmem->sgt = NULL;
 }
 
-void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem)
-{
-	struct drm_gem_object *obj = &shmem->base;
-	struct drm_device *dev = obj->dev;
-
-	WARN_ON(!drm_gem_shmem_is_purgeable(shmem));
-
-	dma_unmap_sgtable(dev->dev, shmem->sgt, DMA_BIDIRECTIONAL, 0);
-	sg_free_table(shmem->sgt);
-	kfree(shmem->sgt);
-	shmem->sgt = NULL;
-
-	drm_gem_shmem_put_pages_locked(shmem);
-
-	shmem->madv = -1;
-
-	drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
-	drm_gem_free_mmap_offset(obj);
-
-	/* Our goal here is to return as much of the memory as
-	 * is possible back to the system as we are called from OOM.
-	 * To do this we must instruct the shmfs to drop all of its
-	 * backing pages, *now*.
-	 */
-	shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
-
-	invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1);
-}
-EXPORT_SYMBOL(drm_gem_shmem_purge_locked);
-
 /**
  * drm_gem_shmem_dumb_create - Create a dumb shmem buffer object
  * @file: DRM file structure to create the dumb buffer for
diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index 972687bf9717..8d7053c36fa6 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -195,7 +195,6 @@ int drm_gem_shmem_set_purgeable(struct drm_gem_shmem_object *shmem);
 int drm_gem_shmem_set_purgeable_and_evictable(struct drm_gem_shmem_object *shmem);
 
 int drm_gem_shmem_swap_in_locked(struct drm_gem_shmem_object *shmem);
-void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem);
 
 struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem);
 struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem);
-- 
2.35.1