linux-kernel - Re: [PATCH] lkdtm: include cacheflush.h

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Date:	Fri, 21 Mar 2014 14:31:54 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
Subject: Re: [PATCH] lkdtm: include cacheflush.h

On Fri, Feb 14, 2014 at 6:58 PM, Kees Cook <keescook@...omium.org> wrote:
> Some architectures need cacheflush.h explicitly included (mips) for
> use of flush_icache_range():
>
>     config: make ARCH=mips allmodconfig
>     All error/warnings:
>     >> ERROR: "flush_icache_range" undefined!

The linux-next builds still fail with a similar error:

http://kisskb.ellerman.id.au/kisskb/buildresult/10808358/

I'm not sure if it ever was a compile error, or if it was always
a missing export symbol type error as it is apparently now.

Paul.
--

>
> Reported-by: Fengguang Wu <fengguang.wu@...el.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  drivers/misc/lkdtm.c |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
> index 47ed2d321351..2ebd52e05773 100644
> --- a/drivers/misc/lkdtm.c
> +++ b/drivers/misc/lkdtm.c
> @@ -46,6 +46,7 @@
>  #include <linux/debugfs.h>
>  #include <linux/vmalloc.h>
>  #include <linux/mman.h>
> +#include <asm/cacheflush.h>
>
>  #ifdef CONFIG_IDE
>  #include <linux/ide.h>
> --
> 1.7.9.5
>
>
> --
> Kees Cook
> Chrome OS Security
> --
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