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Commit fbde2d7d82 ("MIPS: Add generic SMP IPI support") introduced a
sanity check that an IPI IRQ domain can be found during boot, in order
to ensure that IPIs are able to be set up in systems using such domains.
However it was added at a point where systems may have used an IPI IRQ
domain in some situations but not others, and we could not know which
were the case until runtime, so commit 578bffc82e ("MIPS: Don't BUG_ON
when no IPI domain is found") made that check simply skip IPI init if no
domain were found in order to fix the boot for systems such as QEMU
Malta.
We now use IPI IRQ domains for the MIPS CPU interrupt controller, which
means systems which make use of IPI IRQ domains will always do so when
running on multiple CPUs. As a result we now strengthen the sanity check
to ensure that an IPI IRQ domain is found when multiple CPUs are present
in the system.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15838/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
e64889823d