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Nicholas Piggin c4f3b52ce7 powerpc/64s: Disallow system reset vs system reset reentrancy 
In preparation for using a dedicated stack for system reset interrupts,
prevent a nested system reset from recovering, in order to simplify
code that is called in crash/debug path. This allows a system reset
interrupt to just use the base stack pointer.

Keep an in_nmi nesting counter similarly to the in_mce counter. Consider
the interrrupt non-recoverable if it is taken inside another system
reset.

Interrupt nesting could be allowed similarly to MCE, but system reset
is a special case that's not for normal operation, so simplicity wins
until there is requirement for nested system reset interrupts.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 		2017-04-28 21:02:25 +10:00
..
alpha sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
arc arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
arm Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-03-17 12:14:49 -07:00
arm64 arm64 fixes/cleanups: 2017-03-16 11:47:28 -07:00
avr32 arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
blackfin sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
c6x sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
cris Merge branch 'prep-for-5level' 2017-03-10 08:59:07 -08:00
frv arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
h8300 arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
hexagon arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
ia64 arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
m32r sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
m68k sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
metag arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
microblaze arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
mips arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
mn10300 arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
nios2 arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
openrisc openrisc: Export symbols needed by modules 2017-03-16 00:12:57 +09:00
parisc parisc: Fix system shutdown halt 2017-03-18 17:27:45 +01:00
powerpc powerpc/64s: Disallow system reset vs system reset reentrancy 2017-04-28 21:02:25 +10:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-03-12 14:22:25 -07:00
score Fixup for arch/score after extable.h introduction 2017-03-11 14:16:50 -08:00
sh Merge branch 'prep-for-5level' 2017-03-10 08:59:07 -08:00
sparc arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
tile arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
um arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
unicore32 arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
x86 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-03-17 14:05:03 -07:00
xtensa arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
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Kconfig scripts/spelling.txt: add "an user" pattern and fix typo instances 2017-02-27 18:43:46 -08:00