Re: [next] WARNING: CPU: 2 PID: 66 at kernel/locking/rwsem.c:1298 __up_read

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On Tue, 30 Nov 2021 at 18:01, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote:
>
> [Please ignore this email if it is already reported]
>
> Regression found on qemu_arm64.
> Following kernel warnings reported on Linux next-20211130 while booting.

I bisected down to 1ebe2e5f9d68 ("block: remove GENHD_FL_EXT_DEVT")

and when I reverted 1ebe2e5f9d68 ("block: remove GENHD_FL_EXT_DEVT") and the
3 releated patches so patch 1ebe2e5f9d68 was reverted cleanly I
managed to boot without
a warning.

Related patches from next-20211130:
9f18db572c97 ("block: don't set GENHD_FL_NO_PART for hidden gendisks")
430cc5d3ab4d ("block: cleanup the GENHD_FL_* definitions")
a4561f9fccc5 ("sr: set GENHD_FL_REMOVABLE earlier")

With this said, if I revert 9d6abd489e70 ("mtd: core: protect access
to MTD devices while in suspend")
I didn't see the warning either.

Any idea what can be wrong here or what a fix could be?

Only apply this patch from Geert
https://lore.kernel.org/lkml/c26dfdf9ce56e92d23530a09db386b283e62845d.1638289204.git.geert+renesas@xxxxxxxxx/
makes the warning go away too.

Cheers,
Anders



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