powerpc/64: Disable irq restore warning for now
authorMichael Ellerman <mpe@ellerman.id.au>
Mon, 6 Aug 2018 10:30:49 +0000 (20:30 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 7 Aug 2018 11:49:24 +0000 (21:49 +1000)
commit4da1f79227ad42550e3e70e7b4812ec019be3b6e
tree83b6ff5e27b3c01bd9343d06f58a6a10eea81ff4
parent9eab9901b015f489199105c470de1ffc337cfabb
powerpc/64: Disable irq restore warning for now

We recently added a warning in arch_local_irq_restore() to check that
the soft masking state matches reality.

Unfortunately it trips in a few places, which are not entirely trivial
to fix. The key problem is if we're doing function_graph tracing of
restore_math(), the warning pops and then seems to recurse. It's not
entirely clear because the system continuously oopses on all CPUs,
with the output interleaved and unreadable.

It's also been observed on a G5 coming out of idle.

Until we can fix those cases disable the warning for now.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/irq.c