LF-5943 media: samsung csi2: fix build warning with clang

Fix following build warning.

  CC      drivers/staging/media/imx/imx8-mipi-csi2-sam.o
drivers/staging/media/imx/imx8-mipi-csi2-sam.c:1393:3: warning: ignoring return value of function
declared with 'warn_unused_result' attribute [-Wunused-result]
                USER_TO_KERNEL(struct csi_sam_format);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/media/imx/imx8-mipi-csi2-sam.c:1358:3: note: expanded from macro 'USER_TO_KERNEL'
                copy_from_user(arg, arg_user, sizeof(TYPE));\
                ^~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/media/imx/imx8-mipi-csi2-sam.c:1398:3: warning: ignoring return value of function
declared with 'warn_unused_result' attribute [-Wunused-result]
                USER_TO_KERNEL(bool);
                ^~~~~~~~~~~~~~~~~~~~
drivers/staging/media/imx/imx8-mipi-csi2-sam.c:1358:3: note: expanded from macro 'USER_TO_KERNEL'
                copy_from_user(arg, arg_user, sizeof(TYPE));\
                ^~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~

To reproduce the warnings:
1) Install clang 12:
wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh 12

2) Build kernel with clang:
export PATH=/usr/lib/llvm-12/bin/:$PATH  LLVM=1
make ARCH=arm64 imx_v8_defconfig
enable CONFIG_HARDENED_USERCOPY
make ARCH=arm64

Signed-off-by: Robby Cai <robby.cai@nxp.com>
Reviewed-by: Sandor Yu <Sandor.yu@nxp.com>

0 files changed, 0 insertions, 0 deletions