This adds support for __copy to v4.9.y so that we can use it in init/exit_module to avoid -Werror=missing-attributes errors on GCC 9. Link: https://lore.kernel.org/lkml/259986242.BvXPX32bHu@devpool35/ Cc: <stable@xxxxxxxxxxxxxxx> Suggested-by: Rolf Eike Beer <eb@xxxxxxxxx> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@xxxxxxxxx> --- include/linux/compiler.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 80a5bc623c47..e905353f217a 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -54,6 +54,22 @@ extern void __chk_io_ptr(const volatile void __iomem *); #ifdef __KERNEL__ +/* + * Minimal backport of compiler_attributes.h to add support for __copy + * to v4.9.y so that we can use it in init/exit_module to avoid + * -Werror=missing-attributes errors on GCC 9. + */ +#ifndef __has_attribute +# define __has_attribute(x) __GCC4_has_attribute_##x +# define __GCC4_has_attribute___copy__ 0 +#endif + +#if __has_attribute(__copy__) +# define __copy(symbol) __attribute__((__copy__(symbol))) +#else +# define __copy(symbol) +#endif + #ifdef __GNUC__ #include <linux/compiler-gcc.h> #endif -- 2.17.1
