arm64: smp: prepare for smp_processor_id() rework
authorMark Rutland <mark.rutland@arm.com>
Thu, 3 Nov 2016 20:23:10 +0000 (20:23 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 11 Nov 2016 18:25:44 +0000 (18:25 +0000)
commit580efaa7ccfb8c0790dce4396434f0e5ac8d86ee
tree38dd7b2a74ffecb364a274494be39353a1ee9be3
parent623b476fc815464a0241ea7483da7b3580b7d8ac
arm64: smp: prepare for smp_processor_id() rework

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>
arch/arm64/kernel/smp.c