linux-kernel - Re: [PATCH] dma-buf: cma_heap: Include linux/vmalloc.h to fix build failures on MIPS

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Date:   Wed, 16 Dec 2020 23:27:37 +0530
From:   Sumit Semwal <sumit.semwal@...aro.org>
To:     John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Liam Mark <lmark@...eaurora.org>,
        Laura Abbott <labbott@...nel.org>,
        Brian Starkey <Brian.Starkey@....com>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Sandeep Patil <sspatil@...gle.com>,
        Daniel Mentz <danielmentz@...gle.com>,
        Chris Goldsworthy <cgoldswo@...eaurora.org>,
        Ørjan Eide <orjan.eide@....com>,
        Robin Murphy <robin.murphy@....com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Simon Ser <contact@...rsion.fr>,
        James Jones <jajones@...dia.com>,
        "open list:DMA BUFFER SHARING FRAMEWORK" 
        <linux-media@...r.kernel.org>,
        DRI mailing list <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH] dma-buf: cma_heap: Include linux/vmalloc.h to fix build
 failures on MIPS

Hi John,


On Wed, 16 Dec 2020 at 06:19, John Stultz <john.stultz@...aro.org> wrote:
>
> We need to include <linux/vmalloc.h> in order for MIPS to find
> vmap(), as it doesn't otherwise get included there.
>
> Without this patch, one can hit the following build error:
>   drivers/dma-buf/heaps/cma_heap.c: In function 'cma_heap_do_vmap':
>   drivers/dma-buf/heaps/cma_heap.c:195:10: error: implicit declaration of function 'vmap'

Thanks for the patch; I've merged it to drm-misc-next-fixes.

>
> Cc: Sumit Semwal <sumit.semwal@...aro.org>
> Cc: Liam Mark <lmark@...eaurora.org>
> Cc: Laura Abbott <labbott@...nel.org>
> Cc: Brian Starkey <Brian.Starkey@....com>
> Cc: Hridya Valsaraju <hridya@...gle.com>
> Cc: Suren Baghdasaryan <surenb@...gle.com>
> Cc: Sandeep Patil <sspatil@...gle.com>
> Cc: Daniel Mentz <danielmentz@...gle.com>
> Cc: Chris Goldsworthy <cgoldswo@...eaurora.org>
> Cc: Ørjan Eide <orjan.eide@....com>
> Cc: Robin Murphy <robin.murphy@....com>
> Cc: Ezequiel Garcia <ezequiel@...labora.com>
> Cc: Simon Ser <contact@...rsion.fr>
> Cc: James Jones <jajones@...dia.com>
> Cc: linux-media@...r.kernel.org
> Cc: dri-devel@...ts.freedesktop.org
> Fixes: a5d2d29e24be ("dma-buf: heaps: Move heap-helper logic into the cma_heap implementation")
> Reported-by: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
>  drivers/dma-buf/heaps/cma_heap.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c
> index 5e7c3436310c..3c4e34301172 100644
> --- a/drivers/dma-buf/heaps/cma_heap.c
> +++ b/drivers/dma-buf/heaps/cma_heap.c
> @@ -20,6 +20,7 @@
>  #include <linux/module.h>
>  #include <linux/scatterlist.h>
>  #include <linux/slab.h>
> +#include <linux/vmalloc.h>
>
>
>  struct cma_heap {
> --
> 2.17.1
>
Best,
Sumit.