On Sun, Dec 06, 2020 at 10:33:09PM +0100, Thomas Gleixner wrote: > On Sun, Dec 06 2020 at 17:38, Thomas Gleixner wrote: > > On Fri, Dec 04 2020 at 18:43, Jerry Snitselaar wrote: > >> Now that kstat_irqs is exported, get rid of count_interrupts in > >> i915_pmu.c > > > > May I ask why this has been merged in the first place? > > > > Nothing in a driver has ever to fiddle with the internals of an irq > > descriptor. We have functions for properly accessing them. Just because > > C allows to fiddle with everything is not a justification. If the > > required function is not exported then adding the export with a proper > > explanation is not asked too much. > > > > Also this lacks protection or at least a comment why this can be called > > safely and is not subject to a concurrent removal of the irq descriptor. > > The same problem exists when calling kstat_irqs(). It's even documented > > at the top of the function. > > And as pointed out vs. that TPM thing this really could have been a > trivial > > i915->irqs++; > > in the interrupt handler and a read of that instead of iterating over > all possible cpus and summing it up. Oh well...
I'm fine with that. > Thanks, > > tglx /Jarkko _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
