linux-kernel - Re: [Compile Warning] 2.6.30-rc8 build

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:	Fri, 5 Jun 2009 23:06:41 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	lkml@...ethan.org, linux-kernel@...r.kernel.org
Subject: Re: [Compile Warning] 2.6.30-rc8 build

> I don't think there's any way in which gcc can deduce that h->first is
> non-zero on entry to that loop.  Even if it inlines
> serial_unlink_irq_chain() into serial8250_shutdown().

Why does it care ?

Suppose the list is empty, n is loaded with NULL

That follows the BUG_ON path which expands to include a function marked
as not returning

gcc is just rather smarter than your average cc



--
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/