Re: [PATCH V4 1/3] arm64/mm/hotplug: Register boot memory hot remove notifier earlier

On Tue, Sep 29, 2020 at 07:24:45PM +0530, Anshuman Khandual wrote:

This moves memory notifier registration earlier in the boot process from
device_initcall() to early_initcall() which will help in guarding against
potential early boot memory offline requests. Even though there should not
be any actual offlinig requests till memory block devices are initialized
with memory_dev_init() but then generic init sequence might just change in
future. Hence an early registration for the memory event notifier would be
helpful. While here, just skip the registration if CONFIG_MEMORY_HOTREMOVE
is not enabled and also call out when memory notifier registration fails.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Steve Capper <redacted>
Cc: Mark Brown <broonie@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Gavin Shan <redacted>
Signed-off-by: Anshuman Khandual <redacted>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

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