linux-kernel - Re: [PATCH 2/8] objtool, kcsan: Add __tsan_read

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Message-ID: <20200721140448.GZ10769@hirez.programming.kicks-ass.net>
Date:   Tue, 21 Jul 2020 16:04:48 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Marco Elver <elver@...gle.com>
Cc:     paulmck@...nel.org, will@...nel.org, arnd@...db.de,
        mark.rutland@....com, dvyukov@...gle.com, glider@...gle.com,
        kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org
Subject: Re: [PATCH 2/8] objtool, kcsan: Add __tsan_read_write to uaccess
 whitelist

On Tue, Jul 21, 2020 at 12:30:10PM +0200, Marco Elver wrote:
> Adds the new __tsan_read_write compound instrumentation to objtool's
> uaccess whitelist.
> 
> Signed-off-by: Marco Elver <elver@...gle.com>

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>

> ---
>  tools/objtool/check.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/tools/objtool/check.c b/tools/objtool/check.c
> index 63d8b630c67a..38d82e705c93 100644
> --- a/tools/objtool/check.c
> +++ b/tools/objtool/check.c
> @@ -528,6 +528,11 @@ static const char *uaccess_safe_builtin[] = {
>  	"__tsan_write4",
>  	"__tsan_write8",
>  	"__tsan_write16",
> +	"__tsan_read_write1",
> +	"__tsan_read_write2",
> +	"__tsan_read_write4",
> +	"__tsan_read_write8",
> +	"__tsan_read_write16",
>  	"__tsan_atomic8_load",
>  	"__tsan_atomic16_load",
>  	"__tsan_atomic32_load",
> -- 
> 2.28.0.rc0.105.gf9edc3c819-goog
>