fbdev: Remove unused struct fb_deferred_io .first_io field

This optional callback was added in the commit 1f45f9dbb392 ("fb_defio:
add first_io callback") but it was never used by a driver. Let's remove
it since it's unlikely that will be used after a decade that was added.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230121192418.2814955-2-javierm@redhat.com

diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c
index c730253..1b68074 100644 (file)
--- a/drivers/video/fbdev/core/fb_defio.c
+++ b/drivers/video/fbdev/core/fb_defio.c
@@ -157,10 +157,6 @@ static vm_fault_t fb_deferred_io_track_page(struct fb_info *info, unsigned long
        /* protect against the workqueue changing the page list */
        mutex_lock(&fbdefio->lock);
 
-       /* first write in this cycle, notify the driver */
-       if (fbdefio->first_io && list_empty(&fbdefio->pagereflist))
-               fbdefio->first_io(info);
-
        pageref = fb_deferred_io_pageref_get(info, offset, page);
        if (WARN_ON_ONCE(!pageref)) {
                ret = VM_FAULT_OOM;

diff --git a/include/linux/fb.h b/include/linux/fb.h
index 30183fd..daf3363 100644 (file)
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -215,7 +215,6 @@ struct fb_deferred_io {
        struct mutex lock; /* mutex that protects the pageref list */
        struct list_head pagereflist; /* list of pagerefs for touched pages */
        /* callback */
-       void (*first_io)(struct fb_info *info);
        void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
 };
 #endif