linux-kernel - Re: [RFC PATCH 9/9] parisc: allocate sys

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Date:	Thu, 3 Sep 2015 15:41:22 +0000 (UTC)
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	Helge Deller <deller@....de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-api <linux-api@...r.kernel.org>,
	linux-kernel@...r.kernel.org,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	linux-parisc@...r.kernel.org
Subject: Re: [RFC PATCH 9/9] parisc: allocate sys_membarrier system call
 number

----- On Sep 3, 2015, at 8:26 AM, Helge Deller deller@....de wrote:

> Hi Mathieu,
> 
>> [ Untested on this architecture. To try it out: fetch linux-next/akpm,
>>   apply this patch, build/run a membarrier-enabled kernel, and do make
>>   kselftest. ]
>> 
>> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
>> CC: Andrew Morton <akpm@...ux-foundation.org>
>> CC: linux-api@...r.kernel.org
>> CC: "James E.J. Bottomley" <jejb@...isc-linux.org>
>> CC: Helge Deller <deller@....de>
>> CC: linux-parisc@...r.kernel.org
>> ---
>>  arch/parisc/include/uapi/asm/unistd.h | 3 ++-
>>  arch/parisc/kernel/syscall_table.S    | 1 +
>>  2 files changed, 3 insertions(+), 1 deletion(-)
>> 
>> diff --git a/arch/parisc/include/uapi/asm/unistd.h
>> b/arch/parisc/include/uapi/asm/unistd.h
>> index 2e639d7..dadcada 100644
>> --- a/arch/parisc/include/uapi/asm/unistd.h
>> +++ b/arch/parisc/include/uapi/asm/unistd.h
>> @@ -358,8 +358,9 @@
>>  #define __NR_memfd_create	(__NR_Linux + 340)
>>  #define __NR_bpf		(__NR_Linux + 341)
>>  #define __NR_execveat		(__NR_Linux + 342)
>> +#define __NR_membarrier		(__NR_Linux + 343)
>>  
>> -#define __NR_Linux_syscalls	(__NR_execveat + 1)
>> +#define __NR_Linux_syscalls	(__NR_membarrier + 1)
>>  
>>  
>>  #define __IGNORE_select		/* newselect */
>> diff --git a/arch/parisc/kernel/syscall_table.S
>> b/arch/parisc/kernel/syscall_table.S
>> index 8eefb12..2faa43b 100644
>> --- a/arch/parisc/kernel/syscall_table.S
>> +++ b/arch/parisc/kernel/syscall_table.S
>> @@ -438,6 +438,7 @@
>>  	ENTRY_SAME(memfd_create)	/* 340 */
>>  	ENTRY_SAME(bpf)
>>  	ENTRY_COMP(execveat)
>> +	ENTRY_COMP(membarrier)
> 
> This needs to be ENTRY_SAME(membarrier), since you don't have/need a
> compat_membarrier() function.

Allright, will fix.

> 
> After changing to ENTRY_SAME() I did run the kselftest on parisc:
> deller@...xx> ./membarrier_test
> membarrier MEMBARRIER_CMD_QUERY syscall available.
> membarrier: MEMBARRIER_CMD_SHARED success.
> membarrier: tests done!

And add your Tested-by tag, thanks!

Mathieu

> 
> Helge

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
--
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