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| author |   Will Deacon <will.deacon@arm.com> | 2012-01-20 12:01:12 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-23 10:20:05 +0000 |
| commit | eb50439b92b6298bf209a982f295ba9c0f7cb30b (patch) | |
| tree | 8678f4221e4a40907d9781753a8b95c96bbfded6 /arch/arm/include/asm/smp.h | |
| parent | ARM: 7291/1: cache: assume 64-byte L1 cachelines for ARMv7 CPUs (diff) | |
| download | linux-dev-eb50439b92b6298bf209a982f295ba9c0f7cb30b.tar.xz linux-dev-eb50439b92b6298bf209a982f295ba9c0f7cb30b.zip | |
ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP
It turns out that the logical CPU mapping is useful even when !CONFIG_SMP
for manipulation of devices like interrupt and power controllers when
running a UP kernel on a CPU other than 0. This can happen when kexecing
a UP image from an SMP kernel.
In the future, multi-cluster systems running AMP configurations will
require something similar for mapping cluster IDs, so it makes sense to
decouple this logic in preparation for this support.
Acked-by: Yang Bai <hamo.by@gmail.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reported-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/smp.h')
| -rw-r--r-- | arch/arm/include/asm/smp.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h index 1e5717afc4ac..ae29293270a3 100644 --- a/arch/arm/include/asm/smp.h +++ b/arch/arm/include/asm/smp.h @@ -71,12 +71,6 @@ extern void platform_secondary_init(unsigned int cpu); extern void platform_smp_prepare_cpus(unsigned int); /* - * Logical CPU mapping. - */ -extern int __cpu_logical_map[NR_CPUS]; -#define cpu_logical_map(cpu) __cpu_logical_map[cpu] - -/* * Initial data for bringing up a secondary CPU. */ struct secondary_data { |