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SubjectRe: linux-next: build failure after merge of the rr-fixes tree
Stephen Rothwell <> writes:
> 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. :-(

Yep, the 0day tester caught this too (it works on 32-bit unfortunately,
so I didn't see the problem).

I've not touched the #includes any more in my updated patch.


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