arm64: smp: prepare for smp_processor_id() rework

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Subsequent patches will make smp_processor_id() use a percpu variable.
This will make smp_processor_id() dependent on the percpu offset, and
thus we cannot use smp_processor_id() to figure out what to initialise
the offset to.

Prepare for this by initialising the percpu offset based on
current::cpu, which will work regardless of how smp_processor_id() is
implemented. Also, make this relationship obvious by placing this code
together at the start of secondary_start_kernel().

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Mark Rutland 2016-11-03 20:23:10 +00:00 • committed by Catalin Marinas

parent 623b476fc8

commit 580efaa7cc

1 changed files with 4 additions and 3 deletions

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arch/arm64/kernel/smp.c

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