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: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230613110953.24176-38-tzimmermann@suse.de>
Date:   Tue, 13 Jun 2023 13:07:12 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     daniel@...ll.ch, javierm@...hat.com, sam@...nborg.org,
        deller@....de, geert+renesas@...der.be, lee@...nel.org,
        daniel.thompson@...aro.org, jingoohan1@...il.com,
        dan.carpenter@...aro.org, michael.j.ruhl@...el.com
Cc:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-sh@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: [PATCH v3 37/38] fbdev/core: Rework fb init code

Init the class "graphics" before the rest of fbdev. Later steps, such
as the sysfs code, depend on the class. Also arrange the module's exit
code in reverse order.

Unexport the global variable fb_class, which is only shared internally
within the fbdev core module.

Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
---
 drivers/video/fbdev/core/fb_internal.h |  1 +
 drivers/video/fbdev/core/fbcon.c       |  1 +
 drivers/video/fbdev/core/fbmem.c       | 52 ++++++++++----------------
 include/linux/fb.h                     |  1 -
 4 files changed, 22 insertions(+), 33 deletions(-)

diff --git a/drivers/video/fbdev/core/fb_internal.h b/drivers/video/fbdev/core/fb_internal.h
index abe06c9da36e3..0b43c0cd50968 100644
--- a/drivers/video/fbdev/core/fb_internal.h
+++ b/drivers/video/fbdev/core/fb_internal.h
@@ -11,6 +11,7 @@ int fb_register_chrdev(void);
 void fb_unregister_chrdev(void);
 
 /* fbmem.c */
+extern struct class *fb_class;
 extern struct mutex registration_lock;
 extern struct fb_info *registered_fb[FB_MAX];
 extern int num_registered_fb;
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index c6c9d040bdec7..8e76bc246b387 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -78,6 +78,7 @@
 #include <asm/irq.h>
 
 #include "fbcon.h"
+#include "fb_internal.h"
 
 /*
  * FIXME: Locking
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 4edf70241a23c..ee44a46a66be1 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -44,6 +44,8 @@
 
 #define FBPIXMAPSIZE	(1024 * 8)
 
+struct class *fb_class;
+
 DEFINE_MUTEX(registration_lock);
 struct fb_info *registered_fb[FB_MAX] __read_mostly;
 int num_registered_fb __read_mostly;
@@ -899,9 +901,6 @@ fb_blank(struct fb_info *info, int blank)
 }
 EXPORT_SYMBOL(fb_blank);
 
-struct class *fb_class;
-EXPORT_SYMBOL(fb_class);
-
 static int fb_check_foreignness(struct fb_info *fi)
 {
 	const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
@@ -1108,59 +1107,48 @@ void fb_set_suspend(struct fb_info *info, int state)
 }
 EXPORT_SYMBOL(fb_set_suspend);
 
-/**
- *	fbmem_init - init frame buffer subsystem
- *
- *	Initialize the frame buffer subsystem.
- *
- *	NOTE: This function is _only_ to be called by drivers/char/mem.c.
- *
- */
-
-static int __init
-fbmem_init(void)
+static int __init fbmem_init(void)
 {
 	int ret;
 
+	fb_class = class_create("graphics");
+	if (IS_ERR(fb_class)) {
+		ret = PTR_ERR(fb_class);
+		pr_err("Unable to create fb class; errno = %d\n", ret);
+		goto err_fb_class;
+	}
+
 	ret = fb_init_procfs();
 	if (ret)
-		return ret;
+		goto err_class_destroy;
 
 	ret = fb_register_chrdev();
 	if (ret)
-		goto err_chrdev;
-
-	fb_class = class_create("graphics");
-	if (IS_ERR(fb_class)) {
-		ret = PTR_ERR(fb_class);
-		pr_warn("Unable to create fb class; errno = %d\n", ret);
-		fb_class = NULL;
-		goto err_class;
-	}
+		goto err_fb_cleanup_procfs;
 
 	fb_console_init();
 
 	return 0;
 
-err_class:
-	fb_unregister_chrdev();
-err_chrdev:
+err_fb_cleanup_procfs:
 	fb_cleanup_procfs();
+err_class_destroy:
+	class_destroy(fb_class);
+err_fb_class:
+	fb_class = NULL;
 	return ret;
 }
 
 #ifdef MODULE
-module_init(fbmem_init);
-static void __exit
-fbmem_exit(void)
+static void __exit fbmem_exit(void)
 {
 	fb_console_exit();
-
+	fb_unregister_chrdev();
 	fb_cleanup_procfs();
 	class_destroy(fb_class);
-	fb_unregister_chrdev();
 }
 
+module_init(fbmem_init);
 module_exit(fbmem_exit);
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Framebuffer base");
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 1988d11f78bcb..541a0e3ce21f4 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -609,7 +609,6 @@ extern int fb_new_modelist(struct fb_info *info);
 
 extern bool fb_center_logo;
 extern int fb_logo_count;
-extern struct class *fb_class;
 
 static inline void lock_fb_info(struct fb_info *info)
 {
-- 
2.41.0

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ