Patches adding support for hibernation on ARM - ARM hibernation / suspend-to-disk - Fix hang in freeze_processes during hibernation - add an irq disabled version of soft_restart
Patches based on v3.13 tag, verified hibernation on beaglebone black on a branch based on 3.13 merged with initial omap support from Russ Dill which be found here: http://git.linaro.org/git-ro/people/sebastian.capella/linux.git hibernation_3.13_russMerge
[PATCH RFC v1 1/3] ARM: Add irq disabled version of soft_restart. arch/arm/include/asm/system_misc.h | 1 + arch/arm/kernel/process.c | 15 ++++++++++----- 2 files changed, 11 insertions(+), 5 deletions(-)
Adds the ability to run soft restart with local_irq/fiq_disable Useful in hibernation code paths
[PATCH RFC v1 2/3] Fix hibernation restore hang in freeze_processes drivers/base/firmware_class.c | 1 + 1 file changed, 1 insertion(+)
Add handling for PM_RESTORE_PREPARE notifier
[PATCH RFC v1 3/3] ARM hibernation / suspend-to-disk arch/arm/include/asm/memory.h | 1 + arch/arm/kernel/Makefile | 1 + arch/arm/kernel/hibernate.c | 106 +++++++++++++++++++++++++++++++++++++++++ arch/arm/mm/Kconfig | 5 ++ include/linux/suspend.h | 2 + 5 files changed, 115 insertions(+)
Adds support for ARM based hibernation
Additional notes:
There are two checkpatch warnings added by this patch. These follow behavior in existing hibernation implementations on other platforms.
WARNING: externs should be avoided in .c files #116: FILE: arch/arm/kernel/hibernate.c:26: +extern const void __nosave_begin, __nosave_end;
This extern is picking up the linker nosave region definitions, only used in hibernate. Follows same extern line used mips, powerpc, s390, sh, sparc, x86 & unicore32
WARNING: externs should be avoided in .c files #191: FILE: arch/arm/kernel/hibernate.c:101: +extern void call_with_stack(void (*fn)(void *), void *arg, void *sp);
This extern is used in the arch/arm/ in hibernate, process and bL_switcher