The driver uses kzalloc and kfree functions. So it should include
linux/slab.h. This header file is implicitly included by v4l2-common.h
if CONFIG_SPI is enabled. But when it is disabled, slab.h is not
included. In this case, the driver does not compile:

drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c: In function ‘mtk_jpeg_open’:
drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:1017:8: error: implicit
declaration of function ‘kzalloc’
[-Werror=implicit-function-declaration]
  ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
        ^~~~~~~
drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:1017:6: warning:
assignment makes pointer from integer without a cast [-Wint-conversion]
  ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
      ^
drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:1047:2: error: implicit
declaration of function ‘kfree’ [-Werror=implicit-function-declaration]
  kfree(ctx);
  ^~~~~

This patch adds the missing include to fix this issue.

Signed-off-by: Jérémy Lefaure <redacted>
---
 drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index b10183f7942b..f9bd58ce7d32 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c

@@ -22,6 +22,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <media/v4l2-event.h>
 #include <media/v4l2-mem2mem.h>

-- 
2.12.0


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