RE: [PATCH 0/2] Staging: xgifb: Remove CRIT[FLAGS | BEGIN | END] defines nd conditional spinlock compilation logic

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,

From: Javier Martinez Canillas [martinez.javier@xxxxxxxxx]:
> xgifb staging driver uses a set of defines that hides the synchronization
> mechanism used to access critical sections. Also, the use of spinlocks
> can be disabled in compile time.
>
> Since the spinlocks ABI only are used in contexts were critical section exists
> (UP with preemption enabled and SMP machines), I think we should always have
> the spinlocks enabled and let the spinlock ABI choose to include the spinlocks
> or not. In the other hand if the driver doesn't need locking at all, then
> maybe we should just delete the spinlock logic.

I think these should be just deleted. The acceleration functions are used by the framebuffer
layer which should take care of concurrent access. Or can you point out some real scenario
where the spinlocks are needed?

A.
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/devel


[Index of Archives]     [Linux Driver Backports]     [DMA Engine]     [Linux GPIO]     [Linux SPI]     [Video for Linux]     [Linux USB Devel]     [Linux Coverity]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux