[PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly

[Daniel Vetter]

With

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

we have a static dependency between fbcon and fbdev, and we can
replace the indirection through the notifier chain with a function
call.

Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "Noralf TrÃnnes" <noralf@xxxxxxxxxxx>
Cc: Yisheng Xie <ysxie@xxxxxxxxxxx>
Cc: Peter Rosin <peda@xxxxxxxxxx>
Cc: "MichaÅ MirosÅaw" <mirq-linux@xxxxxxxxxxxx>
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Cc: linux-fbdev@xxxxxxxxxxxxxxx
---
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c |  9 ++-------
 include/linux/fb.h               |  4 ----
 include/linux/fbcon.h            |  4 ++++
 4 files changed, 9 insertions(+), 22 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index a1be589b692f..95af6bd783e8 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3115,14 +3115,14 @@ static int fbcon_fb_unbind(int idx)
 }
 
 /* called with console_lock held */
-static int fbcon_fb_unregistered(struct fb_info *info)
+void fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (deferred_takeover)
-		return 0;
+		return;
 
 	idx = info->node;
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
@@ -3151,8 +3151,6 @@ static int fbcon_fb_unregistered(struct fb_info *info)
 
 	if (!num_registered_fb)
 		do_unregister_con_driver(&fb_con);
-
-	return 0;
 }
 
 /* called with console_lock held */
@@ -3211,7 +3209,7 @@ static inline void fbcon_select_primary(struct fb_info *info)
 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
 
 /* called with console_lock held */
-static int fbcon_fb_registered(struct fb_info *info)
+int fbcon_fb_registered(struct fb_info *info)
 {
 	int ret = 0, i, idx;
 
@@ -3355,12 +3353,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		idx = info->node;
 		ret = fbcon_fb_unbind(idx);
 		break;
-	case FB_EVENT_FB_REGISTERED:
-		ret = fbcon_fb_registered(info);
-		break;
-	case FB_EVENT_FB_UNREGISTERED:
-		ret = fbcon_fb_unregistered(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index fc3d34a8ea5b..ae2db31eeba7 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1660,7 +1660,6 @@ MODULE_PARM_DESC(lockless_register_fb,
 static int do_register_framebuffer(struct fb_info *fb_info)
 {
 	int i, ret;
-	struct fb_event event;
 	struct fb_videomode mode;
 
 	if (fb_check_foreignness(fb_info))
@@ -1723,7 +1722,6 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	fb_add_videomode(&mode, &fb_info->modelist);
 	registered_fb[i] = fb_info;
 
-	event.info = fb_info;
 	if (!lockless_register_fb)
 		console_lock();
 	else
@@ -1732,9 +1730,8 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		ret = -ENODEV;
 		goto unlock_console;
 	}
-	ret = 0;
 
-	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
 unlock_console:
 	if (!lockless_register_fb)
@@ -1771,7 +1768,6 @@ static int __unlink_framebuffer(struct fb_info *fb_info);
 
 static int do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	struct fb_event event;
 	int ret;
 
 	ret = unbind_console(fb_info);
@@ -1789,9 +1785,8 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 	registered_fb[fb_info->node] = NULL;
 	num_registered_fb--;
 	fb_cleanup_device(fb_info);
-	event.info = fb_info;
 	console_lock();
-	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	fbcon_fb_unregistered(fb_info);
 	console_unlock();
 
 	/* this may free fb info */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f52ef0ad6781..701abaf79c87 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -136,10 +136,6 @@ struct fb_cursor_user {
 #define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
-/*      A driver registered itself */
-#define FB_EVENT_FB_REGISTERED          0x05
-/*      A driver unregistered itself */
-#define FB_EVENT_FB_UNREGISTERED        0x06
 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index f68a7db14165..94a71e9e1257 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -4,9 +4,13 @@
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
 void __init fb_console_init(void);
 void __exit fb_console_exit(void);
+int fbcon_fb_registered(struct fb_info *info);
+void fbcon_fb_unregistered(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
+static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
+static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1