linux-kernel - Re: [PATCH] scripts/gdb: Fix invocation when CONFIG_COMMON

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Date:   Thu, 23 May 2019 15:46:03 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Fabiano Rosas <farosas@...ux.ibm.com>, linux-kernel@...r.kernel.org
Cc:     Jan Kiszka <jan.kiszka@...mens.com>,
        Kieran Bingham <kbingham@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Leonard Crestez <leonard.crestez@....com>,
        Jackie Liu <liuyun01@...inos.cn>
Subject: Re: [PATCH] scripts/gdb: Fix invocation when CONFIG_COMMON_CLK is not set

Quoting Fabiano Rosas (2019-05-23 12:53:11)
> diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
> index 1d73083da6cb..2efbec6b6b8d 100644
> --- a/scripts/gdb/linux/constants.py.in
> +++ b/scripts/gdb/linux/constants.py.in
> @@ -40,7 +40,8 @@
>  import gdb
>  
>  /* linux/clk-provider.h */
> -LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
> +if IS_BUILTIN(CONFIG_COMMON_CLK):
> +    LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
>  

Why is this LX_GDBPARSED() instead of LX_VALUE()? From what I can tell
it doesn't need to be runtime evaluated, just assigned to something that
is macro expanded by CPP.

We should probably change the clk-provider.h header to export more
things than what it's exporting right now when COMMON_CLK is disabled.
I'm not sure why the whole thing is wrapped in a big ifdef.

Either way

Reviewed-by: Stephen Boyd <swboyd@...omium.org>