linux-kernel - Re: [PATCH -v2 7/8] kexec jump: ftrace_enabled

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]

Date:	Fri, 8 Aug 2008 10:17:00 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Huang Ying <ying.huang@...el.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>, mingo@...e.hu,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Kexec Mailing List <kexec@...ts.infradead.org>,
	rostedt@...dmis.org
Subject: Re: [PATCH -v2 7/8] kexec jump: ftrace_enabled_save/restore

On Fri, Aug 08, 2008 at 02:52:48PM +0800, Huang Ying wrote:
> Add ftrace_enabled_save/restore, used to disable ftrace for a
> while. This is used by kexec jump.
> 
> Signed-off-by: Huang Ying <ying.huang@...el.com>
> 


CCing Steven Rostedt for ftrace related changes.

> ---
>  include/linux/ftrace.h |   18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> --- a/include/linux/ftrace.h
> +++ b/include/linux/ftrace.h
> @@ -98,6 +98,24 @@ static inline void tracer_disable(void)
>  #endif
>  }
>  
> +static inline int ftrace_enabled_save(void)
> +{
> +#ifdef CONFIG_FTRACE
> +	int saved_ftrace_enabled = ftrace_enabled;
> +	ftrace_enabled = 0;
> +	return saved_ftrace_enabled;
> +#else
> +	return 0;
> +#endif
> +}
> +
> +static inline void ftrace_enabled_restore(int enabled)
> +{
> +#ifdef CONFIG_FTRACE
> +	ftrace_enabled = enabled;
> +#endif
> +}
> +
>  #ifdef CONFIG_FRAME_POINTER
>  /* TODO: need to fix this for ARM */
>  # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
> 

--
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/