Messages in this thread | | | Date | Mon, 9 Jan 2023 12:40:54 +0200 | From | Vladimir Oltean <> | Subject | Sparse warning when using ioread64() from include/asm-generic/io.h |
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Hi,
I would like to get rid of the following sparse error in the enetc driver (for arm64), which uses ioread64().
../drivers/net/ethernet/freescale/enetc/enetc_ethtool.c: note: in included file (through ../arch/arm64/include/asm/io.h, ../include/linux/io.h, ../include/linux/irq.h, ../include/asm-generic/hardirq.h, ../arch/arm64/include/asm/hardirq.h, ...): ../include/asm-generic/io.h:239:15: warning: cast to restricted __le64
The trouble is I don't understand why the casts to __le64 and use of __le64_to_cpu() are even needed, when everything seems to be native endianness. I've seen commit c1d55d50139b ("asm-generic/io.h: Fix sparse warnings on big-endian architectures"), but that doesn't claim to fix anything for little endian (and doesn't touch the 64 accessors, for some reason).
Could you please help?
Thanks, Vladimir
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