linux-kernel - Re: [RFC] remove linux/hardirq.h from asm-generic/local.h

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: <20081214095803.9d16e85f.akpm@linux-foundation.org>
Date:	Sun, 14 Dec 2008 09:58:03 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	Linux Kernel List <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org
Subject: Re: [RFC] remove linux/hardirq.h from asm-generic/local.h

On Sun, 14 Dec 2008 13:39:41 +0000 Russell King <rmk+lkml@....linux.org.uk> wrote:

> While looking at reducing the amount of architecture namespace pollution
> in the generic kernel, I found that asm/irq.h is included in the vast
> majority of compilations on ARM (around 650 files.)
> 
> Since asm/irq.h includes a sub-architecture include file on ARM, this
> causes a negative impact on the ccache's ability to re-use the build
> results from other sub-architectures, so we have a desire to reduce
> the dependencies on asm/irq.h.
> 
> It turns out that a major cause of this is the needless include of
> linux/hardirq.h into asm-generic/local.h.  The patch below removes this
> include, resulting in some 250 to 300 files (around half) of the kernel
> then omitting asm/irq.h.
> 
> My test builds still succeed, provided two ARM files are fixed
> (arch/arm/kernel/traps.c and arch/arm/mm/fault.c) - so there may be
> negative impacts for this on other architectures.
> 
> Note that x86 does not include asm/irq.h nor linux/hardirq.h in its
> asm/local.h, so this patch can be viewed as bringing the generic version
> into line with the x86 version.

Sure.  Includes are easy to add and hard to remove.  I'll queue it up
and see if there's fallout.

btw,

> From: Russell King <rmk+lkml@....linux.org.uk>
> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>

that will result in the two rmk's getting separate akpm spam, different
Author from Signer-offer, etc.  Adding an explicit From: line would
improve things.

--
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/