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| author | Helge Deller <deller@gmx.de> | 2017-01-08 11:01:11 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2017-05-10 17:46:14 +0200 |
| commit | c8c3735997a3aa184fa81742bb6c4062a26af2f3 (patch) | |
| tree | 3d6e8864e8935ac167efc3313913444b4eb2e811 /arch/parisc/kernel/processor.c | |
| parent | c3e5523fcffdc9df8faa7d66f5ad8c1c833e1795 (diff) | |
| download | linux-stable-c8c3735997a3aa184fa81742bb6c4062a26af2f3.tar.gz linux-stable-c8c3735997a3aa184fa81742bb6c4062a26af2f3.tar.bz2 linux-stable-c8c3735997a3aa184fa81742bb6c4062a26af2f3.zip | |
parisc: Enhance detection of synchronous cr16 clocksources
The cr16 clocks of the physical PARISC CPUs are usually nonsynchronous.
Nevertheless, it seems that each CPU socket (which holds two cores) of
PA8800 and PA8900 CPUs (e.g. in a C8000 workstation) is fed by the same
clock source, which makes the cr16 clocks of each CPU socket syncronous.
Let's try to detect such situations and mark the cr16 clocksource stable
on single-socket and single-core machines.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel/processor.c')
| -rw-r--r-- | arch/parisc/kernel/processor.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c index 85de47f4eb59..0ab32779dfa7 100644 --- a/arch/parisc/kernel/processor.c +++ b/arch/parisc/kernel/processor.c @@ -94,7 +94,7 @@ static int processor_probe(struct parisc_device *dev) unsigned long txn_addr; unsigned long cpuid; struct cpuinfo_parisc *p; - struct pdc_pat_cpu_num cpu_info __maybe_unused; + struct pdc_pat_cpu_num cpu_info = { }; #ifdef CONFIG_SMP if (num_online_cpus() >= nr_cpu_ids) { @@ -113,6 +113,7 @@ static int processor_probe(struct parisc_device *dev) */ cpuid = boot_cpu_data.cpu_count; txn_addr = dev->hpa.start; /* for legacy PDC */ + cpu_info.cpu_num = cpu_info.cpu_loc = cpuid; #ifdef CONFIG_64BIT if (is_pdc_pat()) { @@ -180,6 +181,8 @@ static int processor_probe(struct parisc_device *dev) p->hpa = dev->hpa.start; /* save CPU hpa */ p->cpuid = cpuid; /* save CPU id */ p->txn_addr = txn_addr; /* save CPU IRQ address */ + p->cpu_num = cpu_info.cpu_num; + p->cpu_loc = cpu_info.cpu_loc; #ifdef CONFIG_SMP /* ** FIXME: review if any other initialization is clobbered |