Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754785Ab0KZNgM (ORCPT ); Fri, 26 Nov 2010 08:36:12 -0500 Received: from caiajhbdcaid.dreamhost.com ([208.97.132.83]:60119 "EHLO homiemail-a1.g.dreamhost.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752479Ab0KZNgL (ORCPT ); Fri, 26 Nov 2010 08:36:11 -0500 Subject: Re: [PATCH] perf: add GCC optimization to memory allocating functions From: Davidlohr Bueso Reply-To: dave@gnu.org To: Peter Zijlstra Cc: Arnaldo Carvalho de Melo , Ingo Molnar , Paul Mackerras , LKML In-Reply-To: <1290778040.2145.145.camel@laptop> References: <1290777864.2373.2.camel@cowboy> <1290778040.2145.145.camel@laptop> Content-Type: text/plain; charset="UTF-8" Date: Fri, 26 Nov 2010 10:36:02 -0300 Message-ID: <1290778562.2373.3.camel@cowboy> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 852 Lines: 20 On Fri, 2010-11-26 at 14:27 +0100, Peter Zijlstra wrote: > On Fri, 2010-11-26 at 10:24 -0300, Davidlohr Bueso wrote: > > From: Davidlohr Bueso > > > > We can benefit from the alloc_size attribute in xrealloc and zalloc. > > What's this alloc_size attribute do? > Quoting from http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html: "The alloc_size attribute is used to tell the compiler that the function return value points to memory, where the size is given by one or two of the functions parameters. GCC uses this information to improve the correctness of __builtin_object_size." -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/