Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH v2] sh: Convert nommu io{re,un}map() to static inline functions | Date | Mon, 20 Jun 2022 09:01:43 +0200 |
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Recently, nommu iounmap() was converted from a static inline function to a macro again, basically reverting commit 4580ba4ad2e6b8dd ("sh: Convert iounmap() macros to inline functions"). With -Werror, this leads to build failures like:
drivers/iio/adc/xilinx-ams.c: In function ‘ams_iounmap_ps’: drivers/iio/adc/xilinx-ams.c:1195:14: error: unused variable ‘ams’ [-Werror=unused-variable] 1195 | struct ams *ams = data; | ^~~
Fix this by replacing the macros for ioremap() and iounmap() by static inline functions, based on <asm-generic/io.h>.
Reported-by: kernel test robot <lkp@intel.com> Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Fixes: 13f1fc870dd74713 ("sh: move the ioremap implementation out of line") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> --- v2: - Add Acked-by, Reviewed-by.
This is actually the third time this change was made, as Christoph converted iounmap() to a macro before in commit 98c90e5ea34e98bd ("sh: remove __iounmap"), reverting commit 733f0025f0fb43e3 ("sh: prevent warnings when using iounmap").
Probably sh-nommu should include <asm-generic/io.h>, but that would require a lot more changes. --- arch/sh/include/asm/io.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h index cf9a3ec32406f856..fba90e670ed41d48 100644 --- a/arch/sh/include/asm/io.h +++ b/arch/sh/include/asm/io.h @@ -271,8 +271,12 @@ static inline void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size, #endif /* CONFIG_HAVE_IOREMAP_PROT */ #else /* CONFIG_MMU */ -#define iounmap(addr) do { } while (0) -#define ioremap(offset, size) ((void __iomem *)(unsigned long)(offset)) +static inline void __iomem *ioremap(phys_addr_t offset, size_t size) +{ + return (void __iomem *)(unsigned long)offset; +} + +static inline void iounmap(volatile void __iomem *addr) { } #endif /* CONFIG_MMU */ #define ioremap_uc ioremap -- 2.25.1
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