Re: [PATCH 2/3] x86/asm/entry/32: Remove most of SYSCALL32 code, part 1

[Andy Lutomirski]

On Mon, Jul 27, 2015 at 12:19 PM, Denys Vlasenko <dvlasenk@xxxxxxxxxx> wrote:
> On 07/24/2015 07:50 PM, Andy Lutomirski wrote:
>> On Fri, Jul 24, 2015 at 6:47 AM, Denys Vlasenko <dvlasenk@xxxxxxxxxx> wrote:
>>> SYSCALL32 code is nearly identical to SYSCALL32, except for initial
>>> section. Merge them.
>>>
>>> The removal is split into two parts, to make review eaiser. This is part 1.
>>>
>>> auditsys_entry_common and auditsys_exit macros are indented one more tab without
>>> any changes. This prevents diff from becoming unreadable.
>>> They will be removed in part 2.
>>
>> I need to read these more closely, which is, at present, exceeding my
>> ability to look at asm.  (See the big NMI thread.)  I'll look soon.
>>
>> Meanwhile, this code is incredibly fragile wrt syscall restart.
>> (Syscall restart on compat is really weird.)  Do we have a decent test
>> for it?
>
> How about this? (Feel free to expand, this is a first cut only).

On a very brief glance, it looks reasonable, but I'd try it with
recvfrom instead of recv because it's a six-argument syscall.

--Andy
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