barrier()

[Valdis.Kletnieks at vt.edu]

On Mon, 25 Feb 2013 12:26:06 +0530, Shraddha Kamat said:
> #define barrier() asm volatile("" ::: "memory")
>
> What exactly volatile("" ::: "memory")  doing here ?

You probably should read Documentation/memory-barriers.txt
in your kernel source tree, and let us know if you still have
questions after that...
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