linux-kernel - Re: [PATCH] Cast removal

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: <20061005152608.b6a7fb27.akpm@osdl.org>
Date:	Thu, 5 Oct 2006 15:26:08 -0700
From:	Andrew Morton <akpm@...l.org>
To:	"Moore, Robert" <robert.moore@...el.com>
Cc:	"Jan Engelhardt" <jengelh@...ux01.gwdg.de>,
	"Len Brown" <lenb@...nel.org>, "Brown, Len" <len.brown@...el.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"ACPI List" <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH] Cast removal

On Thu, 5 Oct 2006 15:14:02 -0700
"Moore, Robert" <robert.moore@...el.com> wrote:

> If you're discussing this type of thing, I agree wholeheartedly:
> 
> static void acpi_processor_notify(acpi_handle handle, u32 event, void
> *data)  {
> -	struct acpi_processor *pr = (struct acpi_processor *)data;
> +	struct acpi_processor *pr = data;
> 

OK, thanks.  I would expect all compilers to be happy with that.  However a
bit of googling I did indicated that lint (or some flavour thereof)
complains about the missing cast.  Which is dumb of it.

> I find this one interesting, as we've put a number of them into the
> ACPICA core:
> 
> -	(void) kmem_cache_destroy(cache);
> +	kmem_cache_destroy(cache);
> 
> I believe that the point of the (void) is to prevent lint from
> squawking, and perhaps some picky ANSI-C compilers. What is the overall
> Linux policy on this?

policy = not;

But there's quite a lot of it in the tree.

Actually..  kmem_cache_destroy() returns void, so any checker which complains
about the missing cast needs a stern talking to.
-
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/