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It must less than 4 in function named FIELD_PREP(REG12_CK_DIV_MASK, div). A way to reproduce when run the following shell command make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j4 The error log is following: ''' In file included from : In function ‘fsl_samsung_hdmi_phy_configure_pll_lock_det’, inlined from ‘fsl_samsung_hdmi_phy_configure’ at drivers/phy/freescale/phy-fsl-samsung-hdmi.c:469:2: ././include/linux/compiler_types.h:542:38: error: call to ‘__compiletime_assert_538’ declared with attribute error: FIELD_PREP: value too large for the field ... drivers/phy/freescale/phy-fsl-samsung-hdmi.c:344:9: note: in expansion of macro ‘FIELD_PREP’ 344 | writeb(FIELD_PREP(REG12_CK_DIV_MASK, div), phy->regs + PHY_REG(12)); | ^~~~~~~~~~ make[5]: *** [scripts/Makefile.build:207：drivers/phy/freescale/phy-fsl-samsung-hdmi.o] error 1 ''' changes in v3 - Simplified code structure changes in v2 - modify the commit message guchongchong (1): phy: freescale: limit div value in FIELD_PREP() drivers/phy/freescale/phy-fsl-samsung-hdmi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.48.1