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    Subject[PATCH V5 12/20] asm-generic/io.h: iounmap/ioport_unmap cleanup.h support
    Date
    Add auto-release cleanups for iounmap() and ioport_unmap().

    Signed-off-by: David E. Box <david.e.box@linux.intel.com>
    Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    ---
    V2 - Move from linux/io.h to asm-generic/io.h. Adds iounmap cleanup if
    iounmap() is defined. Adds ioport_unmap cleanup if CONFIG_IOPORT_MAP
    is defined.

    include/asm-generic/io.h | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
    index bac63e874c7b..9ef0332490b1 100644
    --- a/include/asm-generic/io.h
    +++ b/include/asm-generic/io.h
    @@ -8,6 +8,7 @@
    #define __ASM_GENERIC_IO_H

    #include <asm/page.h> /* I/O is all done through memory accesses */
    +#include <linux/cleanup.h>
    #include <linux/string.h> /* for memset() and memcpy() */
    #include <linux/types.h>
    #include <linux/instruction_pointer.h>
    @@ -1065,6 +1066,10 @@ static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
    #endif
    #endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */

    +#ifdef iounmap
    +DEFINE_FREE(iounmap, void __iomem *, iounmap(_T));
    +#endif
    +
    #ifndef ioremap_wc
    #define ioremap_wc ioremap
    #endif
    @@ -1127,6 +1132,7 @@ static inline void ioport_unmap(void __iomem *p)
    extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
    extern void ioport_unmap(void __iomem *p);
    #endif /* CONFIG_GENERIC_IOMAP */
    +DEFINE_FREE(ioport_unmap, void __iomem *, ioport_unmap(_T));
    #endif /* CONFIG_HAS_IOPORT_MAP */

    #ifndef CONFIG_GENERIC_IOMAP
    --
    2.34.1
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