This patch is intended for v3.10 and it should be considered RFC as I had
only tested it under QEMU and not real hardware (that to be done on Friday).
The patch addresses a shortcomming of the git commite
7a5cd063c7b4c58417f674821d63f5eb6747e37 ("x86-64, gdt: Store/load GDT for
ACPI S3 or hibernate/resume path is not needed.") where its assumption
about restoring a kernel was incorrect. Specifically it assumed that a resumed
kernel MUST be the same as the one booted. That is only true for 32-bit
kernels but not for 64-bit.
And as such it introduces a regression which the attached patch is
fixing.
The patch goes further and also lays the groundwork to make this work under
a 32-bit kernel - even though it is not neccessary. This is done to unify
the 32 and 64-bit code and make it easier in the future to unify the
respective code closer.
arch/x86/include/asm/suspend_32.h | 1 +
arch/x86/include/asm/suspend_64.h | 2 ++
arch/x86/kernel/asm-offsets_32.c | 3 +++
arch/x86/kernel/asm-offsets_64.c | 1 +
arch/x86/power/cpu.c | 15 ++++++++++-----
arch/x86/power/hibernate_asm_32.S | 4 ++++
arch/x86/power/hibernate_asm_64.S | 3 +++
7 files changed, 24 insertions(+), 5 deletions(-)
Konrad Rzeszutek Wilk (1):
x86, x86-64, gdt, hibernate: Store/load GDT for hibernate path.
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