linux-kernel - Re: [BUILD FAILURE] nfs4state.c fails to compile with gcc 4.5.4

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Date:   Thu, 30 Nov 2017 08:05:39 -0500
From:   Anna Schumaker <Anna.Schumaker@...app.com>
To:     Trond Myklebust <trondmy@...marydata.com>,
        "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [BUILD FAILURE] nfs4state.c fails to compile with gcc 4.5.4



On 11/30/2017 06:46 AM, Trond Myklebust wrote:
> On Wed, 2017-11-29 at 23:05 -0500, Steven Rostedt wrote:
>> On Wed, 29 Nov 2017 19:44:33 -0800
>> Linus Torvalds <torvalds@...ux-foundation.org> wrote:
>>
>> I keep older compilers around to test ftrace before -mfentry was
>> introduced.
>>
>> I wonder if I should just add a config to force the use without
>> -mfentry even if the compiler supports it.
>>
>>>  fs/nfs/nfs4state.c   | 3 +--
>>>  include/linux/nfs4.h | 2 +-
>>>  2 files changed, 2 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
>>> index 54fd56d715a8..9db5d0d57fcb 100644
>>> --- a/fs/nfs/nfs4state.c
>>> +++ b/fs/nfs/nfs4state.c
>>> @@ -71,8 +71,7 @@ const nfs4_stateid zero_stateid = {
>>>  };
>>>  const nfs4_stateid invalid_stateid = {
>>>  	{
>>> -		.seqid = cpu_to_be32(0xffffffffU),
>>> -		.other = { 0 },
>>> +		{ .seqid = cpu_to_be32(0xffffffffU), .other = { 0
>>> }, },
>>
>> I tried this and it failed.
>>
>>>  	},
>>>  	.type = NFS4_INVALID_STATEID_TYPE,
>>>  };
>>> diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
>>> index 47adac640191..e394ba0cd6c5 100644
>>> --- a/include/linux/nfs4.h
>>> +++ b/include/linux/nfs4.h
>>> @@ -53,11 +53,11 @@ typedef struct { char data[NFS4_VERIFIER_SIZE];
>>> } nfs4_verifier;
>>>  
>>>  struct nfs4_stateid_struct {
>>>  	union {
>>> -		char data[NFS4_STATEID_SIZE];
>>>  		struct {
>>>  			__be32 seqid;
>>>  			char other[NFS4_STATEID_OTHER_SIZE];
>>>  		} __attribute__ ((packed));
>>> +		char data[NFS4_STATEID_SIZE];
>>
>> But I didn't try this. This looks to be the key.
>>
>> This works for me.
>>
>> Tested-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
>>
>> -- Steve
>>
>>>  	};
>>>  
>>>  	enum {
>>
>>
> 
> We already have a fix queued up for this issue. It was reported and the
> patch hit linux-nfs+linux-kernel almost 2 weeks ago. Anna?

I have it queued up, and I was planning to send it this week with some other fixes.

Anna
>