linux-kernel - Re: [PATCH] powercap / RAPL : remove dependency on iosf

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Message-ID: <56061440.1060007@windriver.com>
Date:	Sat, 26 Sep 2015 11:42:56 +0800
From:	Pengyu Ma <pengyu.ma@...driver.com>
To:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
CC:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	<rafael.j.wysocki@...el.com>, <linux-kernel@...r.kernel.org>,
	"Box, David E" <david.e.box@...el.com>,
	"Anvin, H Peter" <h.peter.anvin@...el.com>
Subject: Re: [PATCH] powercap / RAPL : remove dependency on iosf_mbi

$ objdump --dwarf drivers/powercap/intel_rapl.o |grep iosf
     <65ad>   DW_AT_name        : (indirect string, offset: 0x3644): 
iosf_mbi_read
     <65f7>   DW_AT_name        : (indirect string, offset: 0x496): 
iosf_mbi_write
   5    3    0    0    iosf_mbi.h
   0x00000490 656c5f69 6400696f 73665f6d 62695f77 el_id.iosf_mbi_w
   0x00003640 72656700 696f7366 5f6d6269 5f726561 reg.iosf_mbi_rea

$ grep -i iosf_mbi .config
# CONFIG_IOSF_MBI is not set

It is compiled and included by header file.

Pengyu

On 09/25/2015 12:33 AM, Jacob Pan wrote:
> On Thu, 24 Sep 2015 18:03:32 +0800
> Pengyu Ma <pengyu.ma@...driver.com> wrote:
>
>>> So the problematic case is when RAPL=Y IOSF=M
>>> Since real IOSF functions are available when
>>> #if IS_ENABLED(CONFIG_IOSF_MBI)
>>> There will be no dummy functions for RAPL to reference in this
>>> case.
>> iosf_mbi_write/read will warn itself.
> it does not compile.

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