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SubjectRe: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register")
On Sun, Dec 17, 2017 at 21:43:50 +0800,
weiping zhang <zwp10758@gmail.com> wrote:
>Hi, thanks for testing, I think you first reproduce this issue(got WARNING
>at device_add_disk) by your own build, then add my debug patch.

The problem is still in rc4. Reverting the commit still fixes the problem.
I tested that warning level messages should appear using lkdtm. While
there could be something weird relating to the WARN_ON macro, more likely
there is something different about the boots with the kernels I build
(the exact way initramfs is built is probably different) and probably
that (WARN_ON) code is not getting executed.

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