On 2/2/16 10:58 AM, Boris Ostrovsky wrote: > On 02/02/2016 11:21 AM, David Vrabel wrote: >> This needs some more description in the commit message. >> >>> --- a/arch/x86/xen/smp.c >>> +++ b/arch/x86/xen/smp.c >> [...] >>> + hctxt->cpu_regs.x86_32.cs_base = 0; >>> + hctxt->cpu_regs.x86_32.cs_limit = ~0u; >>> + hctxt->cpu_regs.x86_32.cs_ar = 0xc9b; >>> + hctxt->cpu_regs.x86_32.ds_base = 0; >>> + hctxt->cpu_regs.x86_32.ds_limit = ~0u; >>> + hctxt->cpu_regs.x86_32.ds_ar = 0xc93; >>> + hctxt->cpu_regs.x86_32.es_base = 0; >>> + hctxt->cpu_regs.x86_32.es_limit = ~0u; >>> + hctxt->cpu_regs.x86_32.es_ar = 0xc93; >>> + hctxt->cpu_regs.x86_32.ss_base = 0; >>> + hctxt->cpu_regs.x86_32.ss_limit = ~0u; >>> + hctxt->cpu_regs.x86_32.ss_ar = 0xc93; >>> + hctxt->cpu_regs.x86_32.tr_base = 0; >>> + hctxt->cpu_regs.x86_32.tr_limit = 0xff; >>> + hctxt->cpu_regs.x86_32.tr_ar = 0x8b; >> Lots of hard-coded values here. Should this be #defined somewhere? > > We also don't need to set bases to zero since hctxt is kzalloc'd. I'll > remove that and add a comment. > > As for macros --- I couldn't find the bits defined symbolically anywhere > and since this is the only place this is used the macros would be local > here. > > -boris >
It could be useful to have them defined locally if only to give them some more meaning by having a name rather than 0x8b. Just a thought. -- Doug Goldstein
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