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
| ||
|
Date: Mon, 23 Apr 2007 09:57:22 +0200 From: Matthias Kaehlcke <matthias.kaehlcke@...il.com> To: "Eddie C. Dost" <ecd@...com.com> Cc: Kyle Moffett <mrmacman_g4@....com>, chas@....nrl.navy.mil, linux-kernel@...r.kernel.org Subject: Re: [PATCH] use spinlock instead of binary mutex in idt77252 driver hi, El Mon, Apr 23, 2007 at 09:40:19AM +0200 Eddie C. Dost ha dit: > as long as mutexes are not converted to nop when CONFIG_SMP is not > defined (I don't know what current kernels do), this is of course > correct. You need to verify the headerfiles for the above. i just checked this, neither the mutex header nor implementation files handle things different for CONFIG_SMP. thanks for your comments > On Mon, Apr 23, 2007 at 09:40:26AM +0200, Matthias Kaehlcke wrote: > > El Mon, Apr 23, 2007 at 09:16:08AM +0200 Eddie C. Dost ha dit: > > > > > Please note that the semaphore is used to lock the idt77252 config > > > tables among multiple users including atmsigd even on single processor > > > machines. Does this work with mutexes? > > > > afaik mutexes have the same behaviour as binary semaphores that are > > used as mutexes (always locked and unlocked by the same > > process/thread): > > > > ".. the semaphore type can officially be considered to be on its way > > out. New code should not use semaphores, and old code which uses > > semaphores as mutexes should be converted over when an opportunity > > presents itself." > > > > http://lwn.net/Articles/167034/ > > > > please correct me if i'm wrong, i'm just doing my first steps with > > linux kernel development -- Matthias Kaehlcke Linux Application Developer Barcelona You must have a plan. If you don't have a plan, you'll become part of somebody else's plan .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `- - 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/
Powered by blists - more mailing lists