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Message-Id: <OF3548A4E6.BB93884C-ON00258432.00308557-00258432.00318024@notes.na.collabserv.com>
Date:   Tue, 9 Jul 2019 09:00:40 +0000
From:   "Bernard Metzler" <BMT@...ich.ibm.com>
To:     "Leon Romanovsky" <leon@...nel.org>
Cc:     "Stephen Rothwell" <sfr@...b.auug.org.au>,
        "Doug Ledford" <dledford@...hat.com>,
        "Jason Gunthorpe" <jgg@...lanox.com>,
        "David Miller" <davem@...emloft.net>,
        "Networking" <netdev@...r.kernel.org>,
        "Linux Next Mailing List" <linux-next@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re:  Re: linux-next: build failure after merge of the net-next tree

-----"Leon Romanovsky" <leon@...nel.org> wrote: -----

>To: "Stephen Rothwell" <sfr@...b.auug.org.au>
>From: "Leon Romanovsky" <leon@...nel.org>
>Date: 07/09/2019 08:43AM
>Cc: "Doug Ledford" <dledford@...hat.com>, "Jason Gunthorpe"
><jgg@...lanox.com>, "David Miller" <davem@...emloft.net>,
>"Networking" <netdev@...r.kernel.org>, "Linux Next Mailing List"
><linux-next@...r.kernel.org>, "Linux Kernel Mailing List"
><linux-kernel@...r.kernel.org>, "Bernard Metzler"
><bmt@...ich.ibm.com>
>Subject: [EXTERNAL] Re: linux-next: build failure after merge of the
>net-next tree
>
>On Tue, Jul 09, 2019 at 01:56:36PM +1000, Stephen Rothwell wrote:
>> Hi all,
>>
>> After merging the net-next tree, today's linux-next build (x86_64
>> allmodconfig) failed like this:
>>
>> drivers/infiniband/sw/siw/siw_cm.c: In function
>'siw_create_listen':
>> drivers/infiniband/sw/siw/siw_cm.c:1978:3: error: implicit
>declaration of function 'for_ifa'; did you mean 'fork_idle'?
>[-Werror=implicit-function-declaration]
>>    for_ifa(in_dev)
>>    ^~~~~~~
>>    fork_idle
>> drivers/infiniband/sw/siw/siw_cm.c:1978:18: error: expected ';'
>before '{' token
>>    for_ifa(in_dev)
>>                   ^
>>                   ;
>>    {
>>    ~
>>
>> Caused by commit
>>
>>   6c52fdc244b5 ("rdma/siw: connection management")
>>
>> from the rdma tree.  I don't know why this didn't fail after I
>mereged
>> that tree.
>
>I had the same question, because I have this fix for a couple of days
>already.
>
>>From 56c9e15ec670af580daa8c3ffde9503af3042d67 Mon Sep 17 00:00:00
>2001
>From: Leon Romanovsky <leonro@...lanox.com>
>Date: Sun, 7 Jul 2019 10:43:42 +0300
>Subject: [PATCH] Fixup to build SIW issue
>
>Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
>---
> drivers/infiniband/sw/siw/siw_cm.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
>diff --git a/drivers/infiniband/sw/siw/siw_cm.c
>b/drivers/infiniband/sw/siw/siw_cm.c
>index 8e618cb7261f..c883bf514341 100644
>--- a/drivers/infiniband/sw/siw/siw_cm.c
>+++ b/drivers/infiniband/sw/siw/siw_cm.c
>@@ -1954,6 +1954,7 @@ static void siw_drop_listeners(struct iw_cm_id
>*id)
> int siw_create_listen(struct iw_cm_id *id, int backlog)
> {
> 	struct net_device *dev = to_siw_dev(id->device)->netdev;
>+	const struct in_ifaddr *ifa;
> 	int rv = 0, listeners = 0;
>
> 	siw_dbg(id->device, "id 0x%p: backlog %d\n", id, backlog);
>@@ -1975,8 +1976,7 @@ int siw_create_listen(struct iw_cm_id *id, int
>backlog)
> 			id, &s_laddr.sin_addr, ntohs(s_laddr.sin_port),
> 			&s_raddr->sin_addr, ntohs(s_raddr->sin_port));
>
>-		for_ifa(in_dev)
>-		{
>+		in_dev_for_each_ifa_rcu(ifa, in_dev) {
> 			if (ipv4_is_zeronet(s_laddr.sin_addr.s_addr) ||
> 			    s_laddr.sin_addr.s_addr == ifa->ifa_address) {
> 				s_laddr.sin_addr.s_addr = ifa->ifa_address;
>@@ -1988,7 +1988,6 @@ int siw_create_listen(struct iw_cm_id *id, int
>backlog)
> 					listeners++;
> 			}
> 		}
>-		endfor_ifa(in_dev);
> 		in_dev_put(in_dev);
> 	} else if (id->local_addr.ss_family == AF_INET6) {
> 		struct inet6_dev *in6_dev = in6_dev_get(dev);
>--
>2.21.0
>
>
>>
>> I have marked that driver as depending on BROKEN for today.
>>
>> --
>> Cheers,
>> Stephen Rothwell
>
>
>
I am very sorry for that issues. Things are moving fast, and I
didn't realize 'for_ifa' recently went away. I agree with Leon,
his patch fixes the issue. So, please, let's apply that one.

Leon, many thanks for providing the fix.

Thanks very much,
Bernard.

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