From: Michael Ellerman <mpe@ellerman.id.au>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-mm@kvack.org, Paul Mackerras <paulus@samba.org>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
Richard Weinberger <richard@nod.at>,
x86@kernel.org, Ingo Molnar <mingo@redhat.com>,
Fenghua Yu <fenghua.yu@intel.com>,
user-mode-linux-devel@lists.sourceforge.net,
Will Deacon <will.deacon@arm.com>, Jeff Dike <jdike@addtoit.com>,
Chris Metcalf <cmetcalf@tilera.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
Tony Luck <tony.luck@intel.com>,
Nathan Lynch <Nathan_Lynch@mentor.com>,
linux-kernel@vger.kernel.org,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux390@de.ibm.com, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v4] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area
Date: Tue, 29 Jul 2014 12:19:16 +1000 [thread overview]
Message-ID: <1406600356.11977.4.camel@concordia> (raw)
In-Reply-To: <6435254cc74d6e9172931f27be3854d522ad299b.1406232860.git.luto@amacapital.net>
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@ellerman.id.au> (for powerpc)
cheers
prev parent reply other threads:[~2014-07-29 2:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 20:56 [PATCH v4] arm64,ia64,ppc,s390,sh,tile,um,x86,mm: Remove default gate area Andy Lutomirski
2014-07-24 20:56 ` Andy Lutomirski
2014-07-29 2:19 ` Michael Ellerman [this message]
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