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| author | Helge Deller <deller@gmx.de> | 2015-12-12 18:22:03 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2016-01-12 22:03:36 +0100 |
| commit | fc6325750348272d10a8e39adb9fc0e89a667774 (patch) | |
| tree | 6325d652427aa9928459319badd834d45836b095 | |
| parent | parisc: Initialize PCI bridge cache line and default latency (diff) | |
| download | linux-fc6325750348272d10a8e39adb9fc0e89a667774.tar.xz linux-fc6325750348272d10a8e39adb9fc0e89a667774.zip | |
parisc: Reduce overhead of parisc_requires_coherency()
Signed-off-by: Helge Deller <deller@gmx.de>
| -rw-r--r-- | arch/parisc/include/asm/processor.h | 17 | ||||
| -rw-r--r-- | arch/parisc/kernel/processor.c | 10 |
2 files changed, 17 insertions, 10 deletions
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h index 7e759ecb1343..2e674e13e005 100644 --- a/arch/parisc/include/asm/processor.h +++ b/arch/parisc/include/asm/processor.h @@ -311,18 +311,17 @@ extern unsigned long get_wchan(struct task_struct *p); #define cpu_relax() barrier() #define cpu_relax_lowlatency() cpu_relax() -/* Used as a macro to identify the combined VIPT/PIPT cached - * CPUs which require a guarantee of coherency (no inequivalent - * aliases with different data, whether clean or not) to operate */ -static inline int parisc_requires_coherency(void) -{ +/* + * parisc_requires_coherency() is used to identify the combined VIPT/PIPT + * cached CPUs which require a guarantee of coherency (no inequivalent aliases + * with different data, whether clean or not) to operate + */ #ifdef CONFIG_PA8X00 - return (boot_cpu_data.cpu_type == mako) || - (boot_cpu_data.cpu_type == mako2); +extern int _parisc_requires_coherency; +#define parisc_requires_coherency() _parisc_requires_coherency #else - return 0; +#define parisc_requires_coherency() (0) #endif -} #endif /* __ASSEMBLY__ */ diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c index b68d977ce30f..e81ccf1716e9 100644 --- a/arch/parisc/kernel/processor.c +++ b/arch/parisc/kernel/processor.c @@ -44,6 +44,10 @@ struct system_cpuinfo_parisc boot_cpu_data __read_mostly; EXPORT_SYMBOL(boot_cpu_data); +#ifdef CONFIG_PA8X00 +int _parisc_requires_coherency __read_mostly; +EXPORT_SYMBOL(_parisc_requires_coherency); +#endif DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data); @@ -277,8 +281,12 @@ void __init collect_boot_cpu_data(void) boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion); boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0]; boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1]; -} +#ifdef CONFIG_PA8X00 + _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || + (boot_cpu_data.cpu_type == mako2); +#endif +} /** |