From: Arnd Bergmann arnd@arndb.de

The x86 low-level cache management operations are declared in asm/smp.h, so drivers that call into this code need to include the header:

drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:248:3: error: implicit declaration of function 'wbinvd_on_all_cpus' [-Werror,-Wimplicit-function-declaration] wbinvd_on_all_cpus(); ^

Fixes: a035154da45d ("drm/i915/dmabuf: add paranoid flush-on-acquire") Signed-off-by: Arnd Bergmann arnd@arndb.de --- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index 1adcd8e02d29..853a989fcb9b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c @@ -7,6 +7,7 @@ #include <linux/dma-buf.h> #include <linux/highmem.h> #include <linux/dma-resv.h> +#include <asm/smp.h>

#include "i915_drv.h" #include "i915_gem_object.h"