s390/smp: call smp_reinit_ipl_cpu() before scheduler is available

Browse source

Currently smp_reinit_ipl_cpu() is a pre-SMP early initcall.
That ensures no CPU is running in parallel, but still not
enough to assume the code is exclusive, since the scheduling
is already available.

Move the function call to arch_call_rest_init() callback
to ensure no thread could be preempted and allow lockless
allocation of the kernel page tables. That is needed to
allow a follow-up rework of the absolute lowcore access
mechanism.

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

...

This commit is contained in:

Alexander Gordeev 2022-09-01 10:33:51 +02:00 • committed by Vasily Gorbik

parent d61bb30e43

commit 6cbd7cc2eb

3 changed files with 3 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/s390/include/asm/smp.h

View file

1

arch/s390/kernel/setup.c

View file

3

arch/s390/kernel/smp.c

View file