This is a note to let you know that I've just added the patch titled
asm-generic/io.h: suppress endianness warnings for readq() and writeq()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asm-generic-io.h-suppress-endianness-warnings-for-re.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6a56513c5cdd8d349fcd66aaba422a0461fb8e12
Author: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Date: Mon Jan 9 15:11:52 2023 +0200
asm-generic/io.h: suppress endianness warnings for readq() and writeq()
[ Upstream commit d564fa1ff19e893e2971d66e5c8f49dc1cdc8ffc ]
Commit c1d55d50139b ("asm-generic/io.h: Fix sparse warnings on
big-endian architectures") missed fixing the 64-bit accessors.
Arnd explains in the attached link why the casts are necessary, even if
__raw_readq() and __raw_writeq() do not take endian-specific types.
Link: https://lore.kernel.org/lkml/9105d6fc-880b-4734-857d-e3d30b87ccf6@xxxxxxxxxxxxxxxx/
Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 9ea83d80eb6f9..dcbd41048b4e7 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -190,7 +190,7 @@ static inline u64 readq(const volatile void __iomem *addr)
u64 val;
__io_br();
- val = __le64_to_cpu(__raw_readq(addr));
+ val = __le64_to_cpu((__le64 __force)__raw_readq(addr));
__io_ar(val);
return val;
}
@@ -233,7 +233,7 @@ static inline void writel(u32 value, volatile void __iomem *addr)
static inline void writeq(u64 value, volatile void __iomem *addr)
{
__io_bw();
- __raw_writeq(__cpu_to_le64(value), addr);
+ __raw_writeq((u64 __force)__cpu_to_le64(value), addr);
__io_aw();
}
#endif
