Commit-ID: f6441aff8946f7fd6ab730d7eb9eba18a9ebeba4 Gitweb: http://git.kernel.org/tip/f6441aff8946f7fd6ab730d7eb9eba18a9ebeba4 Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> AuthorDate: Mon, 17 Apr 2017 11:25:00 -0300 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Wed, 19 Apr 2017 13:01:42 -0300 tools include: Adopt __same_type() and __must_be_array() from the kernel Will be used to adopt the more stringent version of ARRAY_SIZE(), the one in the kernel sources. Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: David Ahern <dsahern@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Wang Nan <wangnan0@xxxxxxxxxx> Link: http://lkml.kernel.org/n/tip-d85dpvay1hoqscpezlntyd8x@xxxxxxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/include/linux/compiler-gcc.h | 3 +++ tools/include/linux/compiler.h | 5 +++++ 2 files changed, 8 insertions(+) diff --git a/tools/include/linux/compiler-gcc.h b/tools/include/linux/compiler-gcc.h index 616935f..825d44f 100644 --- a/tools/include/linux/compiler-gcc.h +++ b/tools/include/linux/compiler-gcc.h @@ -16,3 +16,6 @@ #if GCC_VERSION >= 40300 # define __compiletime_error(message) __attribute__((error(message))) #endif /* GCC_VERSION >= 40300 */ + +/* &a[0] degrades to a pointer: a different type from an array */ +#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h index c9e65e8..23299d7 100644 --- a/tools/include/linux/compiler.h +++ b/tools/include/linux/compiler.h @@ -17,6 +17,11 @@ # define __always_inline inline __attribute__((always_inline)) #endif +/* Are two types/vars the same type (ignoring qualifiers)? */ +#ifndef __same_type +# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) +#endif + #ifdef __ANDROID__ /* * FIXME: Big hammer to get rid of tons of: -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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