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mpc512x kernel configurations without SPI support do not build: drivers/media/video/fsl-viu.c: In function 'viu_open': drivers/media/video/fsl-viu.c:1248: error: implicit declaration of function 'kzalloc' drivers/media/video/fsl-viu.c:1248: warning: assignment makes pointer from integer without a cast drivers/media/video/fsl-viu.c: In function 'viu_release': drivers/media/video/fsl-viu.c:1335: error: implicit declaration of function 'kfree' If CONFIG_SPI is enabled, the slab.h will be included in linux/spi/spi.h which is included by media/v4l2-common.h and the fsl_viu.c driver builds. Let's incluce linux/slab.h directly to fix the build breakage. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>