Hi Herbert,

On Wed, 17 Jun 2020 17:03:17 +1000 Herbert Xu <herbert@gondor.apana.org.au> wrote:
>
> On Wed, Jun 17, 2020 at 04:57:15PM +1000, Stephen Rothwell wrote:
> > 
> > Presumably another include needed:
> > 
> > arch/s390/lib/test_unwind.c:49:2: error: implicit declaration of function 'kmalloc' [-Werror=implicit-function-declaration]
> > arch/s390/lib/test_unwind.c:99:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]  
> 

And more (these are coming from other's builds):

  drivers/remoteproc/qcom_q6v5_mss.c:772:3: error: implicit declaration of function 'kfree' [-Werror,-Wimplicit-function-declaration]
  drivers/remoteproc/qcom_q6v5_mss.c:808:2: error: implicit declaration of function 'kfree' [-Werror,-Wimplicit-function-declaration]
  drivers/remoteproc/qcom_q6v5_mss.c:1195:2: error: implicit declaration of function 'kfree' [-Werror,-Wimplicit-function-declaration]

They may have other causes as they are full linux-next builds (not just
after the merge of the vfs tree), but the timing is suspicious.
-- 
Cheers,
Stephen Rothwell