pm: acpi hibernation: utilize hardware signature

ACPI defines a hardware signature.  BIOS calculates the signature according to
hardware configure and if hardware changes while hibernated, the signature
will change.  In that case, S4 resume should fail.

Still, there may be systems on which this mechanism does not work correctly,
so it is better to provide a workaround for them.  For this reason, add a new
switch to the acpi_sleep= command line argument allowing one to disable
hardware signature checking.

[[email protected]: build fix]
Signed-off-by: Shaohua Li <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Len Brown <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Cc: <[email protected]>
Cc: Shaohua Li <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions