From: "Andy Polyakov via RT" <[email protected]>
Date: Mon, 15 Oct 2012 17:22:43 +0200 (CEST)

> It shouldn't. What would be appropriate for Linux kernel to do is to
> arrange so that upper halves of 64-bit GP registers even upon signal
> delivery [which would allow to get rid of expensive setprocmask calls].
> It's done on s390x platforms and one can do same even on PPC.

Sparc does this as well :-)


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