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-rw-r--r--drivers/phy/mediatek/phy-mtk-io.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/phy/mediatek/phy-mtk-io.h b/drivers/phy/mediatek/phy-mtk-io.h
index d20ad5e5be81..58f06db822cb 100644
--- a/drivers/phy/mediatek/phy-mtk-io.h
+++ b/drivers/phy/mediatek/phy-mtk-io.h
@@ -39,8 +39,8 @@ static inline void mtk_phy_update_bits(void __iomem *reg, u32 mask, u32 val)
/* field @mask shall be constant and continuous */
#define mtk_phy_update_field(reg, mask, val) \
({ \
- typeof(mask) mask_ = (mask); \
- mtk_phy_update_bits(reg, mask_, FIELD_PREP(mask_, val)); \
+ BUILD_BUG_ON_MSG(!__builtin_constant_p(mask), "mask is not constant"); \
+ mtk_phy_update_bits(reg, mask, FIELD_PREP(mask, val)); \
})
#endif