Messages in this thread | | | Date | Mon, 11 Feb 2013 01:00:02 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: [PATCH v5 05/45] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally |
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On 02/11/2013 12:12 AM, Oleg Nesterov wrote: > only one cosmetic nit... > > On 01/22, Srivatsa S. Bhat wrote: >> >> +#define READER_PRESENT (1UL << 16) >> +#define READER_REFCNT_MASK (READER_PRESENT - 1) >> + >> #define reader_uses_percpu_refcnt(pcpu_rwlock, cpu) \ >> (ACCESS_ONCE(per_cpu(*((pcpu_rwlock)->reader_refcnt), cpu))) >> >> #define reader_nested_percpu(pcpu_rwlock) \ >> - (__this_cpu_read(*((pcpu_rwlock)->reader_refcnt)) > 1) >> + (__this_cpu_read(*((pcpu_rwlock)->reader_refcnt)) & READER_REFCNT_MASK) >> >> #define writer_active(pcpu_rwlock) \ >> (__this_cpu_read(*((pcpu_rwlock)->writer_signal))) > > I think this all can go to lib/percpu-rwlock.c. Nobody needs to know > these implementation details. >
Ok, will move them.
Regards, Srivatsa S. Bhat
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