linux-kernel - Re: samples: kdbus: kdbus-workers: Define dummy prime

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Date:	Sun, 5 Apr 2015 06:25:19 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	daniel@...que.org, dh.herrmann@...glemail.com, tixxdz@...ndz.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: samples: kdbus: kdbus-workers: Define dummy prime_new()

On 4/4/15 16:26, Greg KH wrote:
> On Sat, Apr 04, 2015 at 06:17:23AM +0800, Chen Gang wrote:
>> Quite a few of architures (e.g. blackfin, cris, frv ...) do not support
>> memfd_create system call which is used in prime_new(). So define a dummy
>> one.
>>
>> The related error (with allmodconfig under blackfin):
>>
>>     CC [M]  samples/kfifo/inttype-example.o
>>   samples/kdbus/kdbus-workers.c: In function ‘prime_new’:
>>   samples/kdbus/kdbus-workers.c:930:18: error: ‘__NR_memfd_create’ undeclared (first use in this function)
>>     p->fd = syscall(__NR_memfd_create, "prime-area", MFD_CLOEXEC);
>>                     ^
>>   samples/kdbus/kdbus-workers.c:930:18: note: each undeclared identifier is reported only once for each function it appears in
>>   make[2]: *** [samples/kdbus/kdbus-workers] Error 1
>>
>> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
>> ---
>>  samples/kdbus/kdbus-workers.c | 11 +++++++++++
>>  1 file changed, 11 insertions(+)
> 
> As Richard said, please hook up these syscalls to those architectures.
> Don't you want to use the feature there?  Why hasn't it been added yet?
> 

OK, thanks. I shall try to finish blackfin within this month. And try
the other archs within next month.

Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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