linux-kernel - Re: [PATCH] kconfig.h: use already defined macros for IS

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 for Android: free password hash cracker in your pocket

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

Date:	Mon, 6 Jun 2016 18:03:54 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Masahiro Yamada <yamada.masahiro@...ionext.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Simek <michal.simek@...inx.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Michal Marek <mmarek@...e.cz>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] kconfig.h: use already defined macros for IS_REACHABLE()
 define

On Tue, 7 Jun 2016, Masahiro Yamada wrote:

> Because config_enabled() is so useful,
> maybe people tend to abuse it.
> 
> I see one case where config_enabled() is used
> for a non-config macro.
> 
> #define __EXPORT_SYMBOL(sym, sec) \
>            __cond_export_sym(sym, sec, config_enabled(__KSYM_##sym))

Here the need is for a macro that returns 1 or 0 whether given 
symbol is defined or not, exactly as explained in the comment above the 
definition for config_enabled() which in itself has nothing to do with 
config.

So maybe config_enabled() should be renamed to __is_defined() or 
similar, and then config_enabled() or its replacement defined in termps 
of it.

Nicolas