mm: create a new system state and fix core_kernel_text()
Bugzilla: https://bugzilla.redhat.com/2076713
Upstream Status: mainline
This is needed to fix builds after MR !747 (merged).
commit d2635f2012a44e3d469ab9a4022162dbe0e53f21
Author: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Fri Nov 5 13:40:40 2021 -0700
mm: create a new system state and fix core_kernel_text()
core_kernel_text() considers that until system_state in at least
SYSTEM_RUNNING, init memory is valid.
But init memory is freed a few lines before setting SYSTEM_RUNNING, so
we have a small period of time when core_kernel_text() is wrong.
Create an intermediate system state called SYSTEM_FREEING_INIT that is
set before starting freeing init memory, and use it in
core_kernel_text() to report init memory invalid earlier.
Link: https://lkml.kernel.org/r/9ecfdee7dd4d741d172cb93ff1d87f1c58127c9a.1633001016.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Patrick Talbert ptalbert@redhat.com
Edited by Patrick Talbert