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Date: Tue, 29 Jul 2014 12:19:16 +1000 From: Michael Ellerman <mpe@...erman.id.au> To: Andy Lutomirski <luto@...capital.net> Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-ia64@...r.kernel.org, linux-sh@...r.kernel.org, Catalin Marinas <catalin.marinas@....com>, Heiko Carstens <heiko.carstens@...ibm.com>, linux-mm@...ck.org, Paul Mackerras <paulus@...ba.org>, "H. Peter Anvin" <hpa@...or.com>, linux-arch@...r.kernel.org, linux-s390@...r.kernel.org, Richard Weinberger <richard@....at>, x86@...nel.org, Ingo Molnar <mingo@...hat.com>, Fenghua Yu <fenghua.yu@...el.com>, user-mode-linux-devel@...ts.sourceforge.net, Will Deacon <will.deacon@....com>, Jeff Dike <jdike@...toit.com>, Chris Metcalf <cmetcalf@...era.com>, Thomas Gleixner <tglx@...utronix.de>, linux-arm-kernel@...ts.infradead.org, Tony Luck <tony.luck@...el.com>, Nathan Lynch <Nathan_Lynch@...tor.com>, linux-kernel@...r.kernel.org, Martin Schwidefsky <schwidefsky@...ibm.com>, linux390@...ibm.com, linuxppc-dev@...ts.ozlabs.org Subject: Re: [PATCH v4] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area On Thu, 2014-07-24 at 13:56 -0700, Andy Lutomirski wrote: > The core mm code will provide a default gate area based on > FIXADDR_USER_START and FIXADDR_USER_END if > !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR). > > This default is only useful for ia64. arm64, ppc, s390, sh, tile, > 64-bit UML, and x86_32 have their own code just to disable it. arm, > 32-bit UML, and x86_64 have gate areas, but they have their own > implementations. > > This gets rid of the default and moves the code into ia64. > > This should save some code on architectures without a gate area: it's > now possible to inline the gate_area functions in the default case. Looks good to me. Booted and everything seems happy, I still have a vdso etc. Tested-by: Michael Ellerman <mpe@...erman.id.au> (for powerpc) cheers -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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