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| author | Juri Lelli <juri.lelli@arm.com> | 2014-08-15 16:53:14 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-08-27 16:40:45 +0200 |
| commit | eba1c71819d210f5e0d522571f9b8abce94fe9c5 (patch) | |
| tree | 9ce0c82dc16f8f20caecb76956b234377de52a6a /drivers | |
| parent | ARM: 8129/1: errata: work around Cortex-A15 erratum 830321 using dummy strex (diff) | |
| download | linux-eba1c71819d210f5e0d522571f9b8abce94fe9c5.tar.xz linux-eba1c71819d210f5e0d522571f9b8abce94fe9c5.zip | |
ARM: 8130/1: cpuidle/cpuidle-big_little: fix reading cpu id part number
Commit af040ffc9ba1 ("ARM: make it easier to check the CPU part number
correctly") changed ARM_CPU_PART_X masks, and the way they are returned and
checked against. Usage of read_cpuid_part_number() is now deprecated, and
calling places updated accordingly. This actually broke cpuidle-big_little
initialization, as bl_idle_driver_init() performs a check using an hardcoded
mask on cpu_id.
Create an interface to perform the check (that is now even easier to read).
Define also a proper mask (ARM_CPU_PART_MASK) that makes this kind of checks
cleaner and helps preventing bugs in the future. Update usage accordingly.
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpuidle/cpuidle-big_little.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/cpuidle/cpuidle-big_little.c b/drivers/cpuidle/cpuidle-big_little.c index 344d79fa3407..ef94c3b81f18 100644 --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -138,25 +138,18 @@ static int bl_enter_powerdown(struct cpuidle_device *dev, return idx; } -static int __init bl_idle_driver_init(struct cpuidle_driver *drv, int cpu_id) +static int __init bl_idle_driver_init(struct cpuidle_driver *drv, int part_id) { - struct cpuinfo_arm *cpu_info; struct cpumask *cpumask; - unsigned long cpuid; int cpu; cpumask = kzalloc(cpumask_size(), GFP_KERNEL); if (!cpumask) return -ENOMEM; - for_each_possible_cpu(cpu) { - cpu_info = &per_cpu(cpu_data, cpu); - cpuid = is_smp() ? cpu_info->cpuid : read_cpuid_id(); - - /* read cpu id part number */ - if ((cpuid & 0xFFF0) == cpu_id) + for_each_possible_cpu(cpu) + if (smp_cpuid_part(cpu) == part_id) cpumask_set_cpu(cpu, cpumask); - } drv->cpumask = cpumask; |