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From: Nathan Chancellor <>
To: Andy Gross <>,
	Bjorn Andersson <>,
	Vinod Koul <>
Cc: Dan Williams <>,
	Nick Desaulniers <>,,,,,
	Nathan Chancellor <>
Subject: [PATCH] dmaengine: qcom: Always inline gpi_update_reg
Date: Tue, 12 Jan 2021 12:12:14 -0700	[thread overview]
Message-ID: <> (raw)

When building with CONFIG_UBSAN_UNSIGNED_OVERFLOW, clang decides not to
inline gpi_update_reg, which causes a linkage failure around __bad_mask:

ld.lld: error: undefined symbol: __bad_mask
>>> referenced by bitfield.h:119 (include/linux/bitfield.h:119)
>>>               dma/qcom/gpi.o:(gpi_update_reg) in archive drivers/built-in.a
>>> referenced by bitfield.h:119 (include/linux/bitfield.h:119)
>>>               dma/qcom/gpi.o:(gpi_update_reg) in archive drivers/built-in.a

If gpi_update_reg is not inlined, the mask value will not be known at
compile time so the check in field_multiplier stays in the final
object file, causing the above linkage failure. Always inline
gpi_update_reg so that this check can never fail.

Fixes: 5d0c3533a19f ("dmaengine: qcom: Add GPI dma driver")
Signed-off-by: Nathan Chancellor <>
 drivers/dma/qcom/gpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c
index 1a0bf6b0567a..e48eb397f433 100644
--- a/drivers/dma/qcom/gpi.c
+++ b/drivers/dma/qcom/gpi.c
@@ -584,7 +584,7 @@ static inline void gpi_write_reg_field(struct gpii *gpii, void __iomem *addr,
 	gpi_write_reg(gpii, addr, val);
-static inline void
+static __always_inline void
 gpi_update_reg(struct gpii *gpii, u32 offset, u32 mask, u32 val)
 	void __iomem *addr = gpii->regs + offset;

base-commit: 7c53f6b671f4aba70ff15e1b05148b10d58c2837

             reply	other threads:[~2021-01-12 19:13 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-12 19:12 Nathan Chancellor [this message]
2021-01-13 11:21 ` Vinod Koul

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