powerpc/pseries: Limit machine check stack to 4GB
authorNicholas Piggin <npiggin@gmail.com>
Fri, 8 May 2020 04:34:01 +0000 (14:34 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Mon, 18 May 2020 14:10:34 +0000 (00:10 +1000)
commitd2cbbd45d433b96e41711a293e59cff259143694
treef8885d31c2c29c8e845c6ff8f9f23a1497c112a1
parentd7b14c5c042865070a1411078ab49ea17bad0b41
powerpc/pseries: Limit machine check stack to 4GB

This allows rtas_args to be put on the machine check stack, which
avoids a lot of complications with re-entrancy deadlocks.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200508043408.886394-10-npiggin@gmail.com
arch/powerpc/kernel/setup_64.c