Just a tool for CI to emit the stacktrace of who is lost track of their
framebuffers and tried to free it before unregistering it.

References: https://bugs.freedesktop.org/show_bug.cgi?id=107712
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
---
Would be useful to keep in core-for-CI as a debug aide.
---
 drivers/video/fbdev/core/fbsysfs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/video/fbdev/core/fbsysfs.c 
b/drivers/video/fbdev/core/fbsysfs.c
index e31a182b42bf..de3afba984c7 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -83,6 +83,11 @@ void framebuffer_release(struct fb_info *info)
 {
        if (!info)
                return;
+
+       if (WARN(atomic_read(&info->count),
+                "framebuffer is still registered, leaking fb_info!\n"))
+               return;
+
        kfree(info->apertures);
        kfree(info);
 }
-- 
2.19.0.rc1

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