linux-kernel - [RFC PATCH v4 11/11] fbdev: Make registered

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Message-Id: <20220429084253.1085911-12-javierm@redhat.com>
Date:   Fri, 29 Apr 2022 10:42:53 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     dri-devel@...ts.freedesktop.org,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        kernel test robot <lkp@...el.com>,
        Jens Frederich <jfrederich@...il.com>,
        Jon Nettleton <jon.nettleton@...il.com>,
        linux-staging@...ts.linux.dev,
        Daniel Vetter <daniel.vetter@...el.com>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>, Helge Deller <deller@....de>,
        Matthew Wilcox <willy@...radead.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        Alex Deucher <alexander.deucher@....com>,
        Xiyu Yang <xiyuyang19@...an.edu.cn>,
        linux-fbdev@...r.kernel.org, Zheyu Ma <zheyuma97@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Changcheng Deng <deng.changcheng@....com.cn>
Subject: [RFC PATCH v4 11/11] fbdev: Make registered_fb[] private to fbmem.c

From: Daniel Vetter <daniel.vetter@...ll.ch>

Well except when the olpc dcon fbdev driver is enabled, that thing
digs around in there in rather unfixable ways.

Cc oldc_dcon maintainers as fyi.

v2: I typoed the config name (0day)

Cc: kernel test robot <lkp@...el.com>
Cc: Jens Frederich <jfrederich@...il.com>
Cc: Jon Nettleton <jon.nettleton@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-staging@...ts.linux.dev
Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: Helge Deller <deller@....de>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Sam Ravnborg <sam@...nborg.org>
Cc: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc: Zhen Lei <thunder.leizhen@...wei.com>
Cc: Alex Deucher <alexander.deucher@....com>
Cc: Xiyu Yang <xiyuyang19@...an.edu.cn>
Cc: linux-fbdev@...r.kernel.org
Cc: Zheyu Ma <zheyuma97@...il.com>
Cc: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---

(no changes since v1)

 drivers/video/fbdev/core/fbmem.c | 8 ++++++--
 include/linux/fb.h               | 7 +++----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 7583296481b0..1ce5b0f3abd4 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -50,10 +50,14 @@
 static DEFINE_MUTEX(registration_lock);
 
 struct fb_info *registered_fb[FB_MAX] __read_mostly;
-EXPORT_SYMBOL(registered_fb);
-
 int num_registered_fb __read_mostly;
+#if IS_ENABLED(CONFIG_FB_OLPC_DCON)
+EXPORT_SYMBOL(registered_fb);
 EXPORT_SYMBOL(num_registered_fb);
+#endif
+#define for_each_registered_fb(i)		\
+	for (i = 0; i < FB_MAX; i++)		\
+		if (!registered_fb[i]) {} else
 
 bool fb_center_logo __read_mostly;
 
diff --git a/include/linux/fb.h b/include/linux/fb.h
index b781bc721113..208bca693b33 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -623,16 +623,15 @@ extern int fb_get_color_depth(struct fb_var_screeninfo *var,
 extern int fb_get_options(const char *name, char **option);
 extern int fb_new_modelist(struct fb_info *info);
 
+#if IS_ENABLED(CONFIG_FB_OLPC_DCON)
 extern struct fb_info *registered_fb[FB_MAX];
+
 extern int num_registered_fb;
+#endif
 extern bool fb_center_logo;
 extern int fb_logo_count;
 extern struct class *fb_class;
 
-#define for_each_registered_fb(i)		\
-	for (i = 0; i < FB_MAX; i++)		\
-		if (!registered_fb[i]) {} else
-
 static inline void lock_fb_info(struct fb_info *info)
 {
 	mutex_lock(&info->lock);
-- 
2.35.1