linux-kernel - Re: [PATCH v2 2/2] x86: Support compiling out human-friendly processor feature names

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <530A3668.2090902@zytor.com>
Date:	Sun, 23 Feb 2014 09:56:56 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Josh Triplett <josh@...htriplett.org>
CC:	Borislav Petkov <bp@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Feng Tang <feng.tang@...el.com>,
	Ingo Molnar <mingo@...hat.com>,
	Jacob Shin <jacob.shin@....com>,
	Jan Beulich <JBeulich@...e.com>,
	Jussi Kivilinna <jussi.kivilinna@....fi>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Rob Landley <rob@...dley.net>,
	Seiji Aguchi <seiji.aguchi@....com>,
	Stephane Eranian <eranian@...gle.com>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v2 2/2] x86: Support compiling out human-friendly processor
 feature names

On 02/22/2014 01:36 PM, Josh Triplett wrote:
> 
> No, even after removing the ifdefs around the build rules as you
> suggested (and v3's fixes for the resulting build issues, notably
> changing some -y's to -$(CONFIG_X86_FEATURE_NAMES)), the makefiles still
> manage to not build mkcpustr or cpustr.h, because nothing depends on it.
> 

How could it miss the rule:

$(obj)/cpu.o: $(obj)/cpustr.h

> I could change the build rules to generate an empty cpustr.h and avoid
> this ifdef, but that'd require an additional ifdef block in the Makefile.

Typically the way it is done is to generate the #ifdef *inside*
cpustr.h.  However, cpustr.h is kind of special anyway so it probably
doesn't matter.

	-hpa


--
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/