linux-kernel - Re: [PATCH 1/2] HAVE_SET_RESTORE

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Message-ID: <20080410203250.GA21589@flint.arm.linux.org.uk>
Date:	Thu, 10 Apr 2008 21:32:50 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Roland McGrath <roland@...hat.com>,
	"Linus Torvalds <torvalds@...ux-foundation.org>Andrew Morton" 
	<akpm@...ux-foundation.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-s390@...r.kernel.org, tony.luck@...el.com,
	linux-ia64@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, miles@....org, geert@...ux-m68k.org,
	zippel@...ux-m68k.org
Subject: Re: [PATCH 1/2] HAVE_SET_RESTORE_SIGMASK

On Wed, Apr 09, 2008 at 12:45:32PM +0100, David Woodhouse wrote:
> On Fri, 2008-03-28 at 20:11 -0700, Roland McGrath wrote:
> > Change all the #ifdef TIF_RESTORE_SIGMASK conditionals in non-arch
> > code to #ifdef HAVE_SET_RESTORE_SIGMASK.
> 
> That ifdef was only supposed to be a temporary thing until all
> architectures had implemented TIF_RESTORE_SIGMASK anyway.
> 
> It looks like only ARM, v850 and m68k which are still missing it; if
> those three architectures can catch up, then hopefully it can die off
> completely quite soon.

Well, we don't have the pselect/ppoll/epoll_wait syscalls and there's
been no demand for them, so I don't particularly see the point of
going to the trouble of adding support for something no one's
interested in using.

I was going to suggest defining TIF_RESTORE_SIGMASK to zero to eliminate
some of the code (and the ifdefs), but unfortunately its a bit position
not a bitmask so that won't work.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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