[PATCH 1/2] drm/i915/dmabuf: fix broken build

[Matthew Auld]

On Thu, 21 Oct 2021 at 13:54, Matthew Auld <matthew.auld at intel.com> wrote:
>
> wbinvd_on_all_cpus() is only defined on x86 it seems, plus we need to
> include asm/smp.h here.
>
> Reported-by: kernel test robot <lkp at intel.com>
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>

Jani, would it make sense to cherry-pick this to -fixes? The offending
commit is in drm-next, and there have been a few reports around this.

Fixes: a035154da45d ("drm/i915/dmabuf: add paranoid flush-on-acquire")


> ---
>  drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> index 1adcd8e02d29..a45d0ec2c5b6 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> @@ -12,6 +12,13 @@
>  #include "i915_gem_object.h"
>  #include "i915_scatterlist.h"
>
> +#if defined(CONFIG_X86)
> +#include <asm/smp.h>
> +#else
> +#define wbinvd_on_all_cpus() \
> +       pr_warn(DRIVER_NAME ": Missing cache flush in %s\n", __func__)
> +#endif
> +
>  I915_SELFTEST_DECLARE(static bool force_different_devices;)
>
>  static struct drm_i915_gem_object *dma_buf_to_obj(struct dma_buf *buf)
> --
> 2.26.3
>