linux-kernel - [PATCH 4/8] drm/i915: Use huge tmpfs mount point helpers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250929200316.18417-5-loic.molinari@collabora.com>
Date: Mon, 29 Sep 2025 22:03:12 +0200
From: Loïc Molinari <loic.molinari@...labora.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Rob Herring <robh@...nel.org>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Melissa Wen <mwen@...lia.com>,
	Maíra Canal <mcanal@...lia.com>,
	Hugh Dickins <hughd@...gle.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Loïc Molinari <loic.molinari@...labora.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Mikołaj Wasiak <mikolaj.wasiak@...el.com>,
	Christian Brauner <brauner@...nel.org>,
	Nitin Gote <nitin.r.gote@...el.com>,
	Andi Shyti <andi.shyti@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org,
	linux-mm@...ck.org,
	kernel@...labora.com
Subject: [PATCH 4/8] drm/i915: Use huge tmpfs mount point helpers

Make use of the new drm_gem_shmem_huge_mnt_create() and
drm_gem_shmem_huge_mnt_free() helpers to avoid code duplication.

Signed-off-by: Loïc Molinari <loic.molinari@...labora.com>
---
 drivers/gpu/drm/i915/gem/i915_gemfs.c | 33 +++------------------------
 1 file changed, 3 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gemfs.c b/drivers/gpu/drm/i915/gem/i915_gemfs.c
index a09e2eb47175..70563a6a0b81 100644
--- a/drivers/gpu/drm/i915/gem/i915_gemfs.c
+++ b/drivers/gpu/drm/i915/gem/i915_gemfs.c
@@ -3,25 +3,13 @@
  * Copyright © 2017 Intel Corporation
  */
 
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/fs_context.h>
-
 #include "i915_drv.h"
 #include "i915_gemfs.h"
 #include "i915_utils.h"
 
-static int add_param(struct fs_context *fc, const char *key, const char *val)
-{
-	return vfs_parse_fs_string(fc, key, val, strlen(val));
-}
-
 void i915_gemfs_init(struct drm_i915_private *i915)
 {
-	struct file_system_type *type;
-	struct fs_context *fc;
 	struct vfsmount *gemfs;
-	int ret;
 
 	/*
 	 * By creating our own shmemfs mountpoint, we can pass in
@@ -38,23 +26,8 @@ void i915_gemfs_init(struct drm_i915_private *i915)
 	if (GRAPHICS_VER(i915) < 11 && !i915_vtd_active(i915))
 		return;
 
-	if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE))
-		goto err;
-
-	type = get_fs_type("tmpfs");
-	if (!type)
-		goto err;
-
-	fc = fs_context_for_mount(type, SB_KERNMOUNT);
-	if (IS_ERR(fc))
-		goto err;
-	ret = add_param(fc, "source", "tmpfs");
-	if (!ret)
-		ret = add_param(fc, "huge", "within_size");
-	if (!ret)
-		gemfs = fc_mount_longterm(fc);
-	put_fs_context(fc);
-	if (ret)
+	gemfs = drm_gem_shmem_huge_mnt_create("within_size");
+	if (IS_ERR(gemfs))
 		goto err;
 
 	i915->mm.gemfs = gemfs;
@@ -70,5 +43,5 @@ void i915_gemfs_init(struct drm_i915_private *i915)
 
 void i915_gemfs_fini(struct drm_i915_private *i915)
 {
-	kern_unmount(i915->mm.gemfs);
+	drm_gem_shmem_huge_mnt_free(i915->mm.gemfs);
 }
-- 
2.47.3