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Backport minimal compiler_attributes.h to support GCC 9

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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@vger.kernel.org>
Suggested-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Miguel Ojeda 2019-08-02 12:37:56 +02:00 committed by Greg Kroah-Hartman
parent 0b32699489
commit fe5844365e
1 changed files with 16 additions and 0 deletions
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16
include/linux/compiler.h
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@ -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