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arm64: kernel: fix per-cpu offset restore on resume
authorLorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>
Fri, 24 Jan 2014 10:56:19 +0000 (10:56 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 24 Jan 2014 14:27:40 +0000 (14:27 +0000)
commitfb4a96029c8a091c4365f57307e098543b48a222
treee439961e88812f75e273bbceb404800570ea5ee4
parent03324e6e6e66ebd171d9b4b90fd6a2655980dc13
arm64: kernel: fix per-cpu offset restore on resume

The introduction of percpu offset optimisation through tpidr_el1 in:

Commit id :7158627686f02319c50c8d9d78f75d4c8
"arm64: percpu: implement optimised pcpu access using tpidr_el1"

requires cpu_{suspend/resume} to restore the tpidr_el1 register upon resume
so that percpu variables can be addressed correctly when a CPU comes out
of reset from warm-boot.

This patch fixes cpu_{suspend}/{resume} tpidr_el1 restoration on resume, by
calling the set_my_cpu_offset C API, as it is done on primary and secondary
CPUs on cold boot, so that, even if the register used to store the percpu
offset is changed, the save and restore of general purpose registers does not
have to be updated.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/kernel/suspend.c