linux-kernel - linux-next: build failure after merge of the rr-fixes tree

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Date:	Mon, 20 May 2013 10:51:33 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Vinod Koul <vinod.koul@...el.com>
Subject: linux-next: build failure after merge of the rr-fixes tree

Hi Rusty,

After merging the rr-fixes tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/dma/iovlock.c: In function 'dma_pin_iovec_pages':
drivers/dma/iovlock.c:98:21: error: dereferencing pointer to incomplete type
   down_read(&current->mm->mmap_sem);
                     ^
drivers/dma/iovlock.c:101:11: error: dereferencing pointer to incomplete type
    current->mm,
           ^
drivers/dma/iovlock.c:108:19: error: dereferencing pointer to incomplete type
   up_read(&current->mm->mmap_sem);
                   ^

Caused by commit 11227d242a8c ("Hoist memcpy_fromiovec/memcpy_toiovec
into lib/").  Clearly, net/tcp.h was indirectly including sched.h or
asm/current.h.  Changing inclusions is fraught with problems since people
do not follow Rule 1 (in Documentation/SubmitChecklist) consistently.  :-(

I have used the rr-fixes tree from next-20130515 (since the fix in
rr-fixes in next-20130516/7 conflicts with the better fix now in Linus'
tree) for today.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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