linux-kernel - Re: [PATCH 8/9] MIPS: Add a platform hook for swiotlb setup.

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Date:	Fri, 24 Sep 2010 09:13:54 -0700
From:	David Daney <ddaney@...iumnetworks.com>
To:	Sergei Shtylyov <sshtylyov@...sta.com>
CC:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/9] MIPS: Add a platform hook for swiotlb setup.

On 09/24/2010 09:08 AM, Sergei Shtylyov wrote:
> Hello.
>
> David Daney wrote:
>
>> This allows platforms that are using the swiotlb to initialize it.
>
>> Signed-off-by: David Daney <ddaney@...iumnetworks.com>
>> ---
>> arch/mips/include/asm/bootinfo.h | 5 +++++
>> arch/mips/kernel/setup.c | 5 +++++
>> 2 files changed, 10 insertions(+), 0 deletions(-)
>
>> diff --git a/arch/mips/include/asm/bootinfo.h
>> b/arch/mips/include/asm/bootinfo.h
>> index 15a8ef0..b3cf989 100644
>> --- a/arch/mips/include/asm/bootinfo.h
>> +++ b/arch/mips/include/asm/bootinfo.h
>> @@ -125,4 +125,9 @@ extern unsigned long fw_arg0, fw_arg1, fw_arg2,
>> fw_arg3;
>> */
>> extern void plat_mem_setup(void);
>>
>> +/*
>> + * Optional platform hook to call swiotlb_setup().
>> + */
>> +extern void plat_swiotlb_setup(void);
>> +
>> #endif /* _ASM_BOOTINFO_H */
>> diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
>> index 85aef3f..8b650da 100644
>> --- a/arch/mips/kernel/setup.c
>> +++ b/arch/mips/kernel/setup.c
>> @@ -488,6 +488,11 @@ static void __init arch_mem_init(char **cmdline_p)
>>
>> bootmem_init();
>> sparse_init();
>> +
>> +#ifdef CONFIG_SWIOTLB
>> + plat_swiotlb_setup();
>> +#endif
>
> We should avoid #ifdef's in function bodies. Why not defile an empty
> 'inline' in the header above if CONFIG_SWIOTLB is not defined?
>

Good idea.  I will wait several days and collect any more feedback and 
generate a new patch set.

David Daney
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