linux-kernel - Re: [PATCH] x86: introduce bootmem

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Message-ID: <49B17E6C.2040702@kernel.org>
Date:	Fri, 06 Mar 2009 11:50:04 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: introduce bootmem_state -v2

Ingo Molnar wrote:
> * Yinghai Lu <yinghai@...nel.org> wrote:
> 
>> Impact: cleanup
>>
>> extend after_bootmem and after_init_bootmem to bootmem_state
>> and will have BEFORE_BOOTMEM, DURING_BOOTMEM, AFTER_BOOTMEM
>>
>> v2: style changes according to ingo
>>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>
>> ---
>>  arch/x86/kernel/setup.c |    1 +
>>  arch/x86/mm/init.c      |   13 +++++++------
>>  arch/x86/mm/init_32.c   |   28 ++++++++++++++++++++--------
>>  arch/x86/mm/init_64.c   |   33 +++++++++++++++++++--------------
>>  include/linux/mm.h      |    9 +++++++++
>>  5 files changed, 56 insertions(+), 28 deletions(-)
> 
>> Index: linux-2.6/include/linux/mm.h
>> ===================================================================
>> --- linux-2.6.orig/include/linux/mm.h
>> +++ linux-2.6/include/linux/mm.h
>> @@ -1067,6 +1067,15 @@ extern void __init mmap_init(void);
>>  extern void show_mem(void);
>>  extern void si_meminfo(struct sysinfo * val);
>>  extern void si_meminfo_node(struct sysinfo *val, int nid);
>> +
>> +enum bootmem_state {
>> +	BEFORE_BOOTMEM,
>> +	DURING_BOOTMEM,
>> +	AFTER_BOOTMEM
>> +};
>> +
>> +extern enum bootmem_state bootmem_state;
>> +
>>  extern int after_bootmem;
> 
> Btw., the after_bootmem variable itself should either move to 
> x86 (and arch/sh), or should be defined in mm/bootmem.c.
> 
> Right now we have this weird mm.h construct that is not actually 
> useful to generic code.

with this patch, only sh is using after_bootmem. could
1. make sh to use bootmem_state
2. then remove after_bootmem

YH
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