linux-kernel - Re: [PATCH] perf: Fix a precedence bug

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Message-ID: <54F0490B.5090009@huawei.com>
Date:	Fri, 27 Feb 2015 18:38:03 +0800
From:	He Kuang <hekuang@...wei.com>
To:	<masami.hiramatsu.pt@...achi.com>, <acme@...nel.org>,
	<mingo@...hat.com>
CC:	<wangnan0@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf: Fix a precedence bug

Signed-off-by: He Kuang <hekuang@...wei.com>
在 2015/2/27 17:35, He Kuang 写道:
> The minus operator has higher precedence than ?:
> Add parentheses around ?: fix this.
> ---
>   tools/perf/util/probe-event.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
> index 919937e..bed8d0f 100644
> --- a/tools/perf/util/probe-event.c
> +++ b/tools/perf/util/probe-event.c
> @@ -150,7 +150,7 @@ static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc)
>   		sym = __find_kernel_function_by_name(name, &map);
>   		if (sym)
>   			return map->unmap_ip(map, sym->start) -
> -				(reloc) ? 0 : map->reloc;
> +				((reloc) ? 0 : map->reloc);
>   	}
>   	return 0;
>   }


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