From dcf8e5633e2e69ad60b730ab5905608b756a032f Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Tue, 23 Aug 2022 12:59:25 -0700 Subject: tracing: Define the is_signed_type() macro once There are two definitions of the is_signed_type() macro: one in and a second definition in . As suggested by Linus, move the definition of the is_signed_type() macro into the header file. Change the definition of the is_signed_type() macro to make sure that it does not trigger any sparse warnings with future versions of sparse for bitwise types. Link: https://lore.kernel.org/all/CAHk-=whjH6p+qzwUdx5SOVVHjS3WvzJQr6mDUwhEyTf6pJWzaQ@mail.gmail.com/ Link: https://lore.kernel.org/all/CAHk-=wjQGnVfb4jehFR0XyZikdQvCZouE96xR_nnf5kqaM5qqQ@mail.gmail.com/ Cc: Rasmus Villemoes Cc: Steven Rostedt Acked-by: Kees Cook Signed-off-by: Bart Van Assche Signed-off-by: Linus Torvalds --- include/linux/compiler.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/compiler.h') diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 01ce94b58b42..7713d7bcdaea 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -239,6 +239,12 @@ static inline void *offset_to_ptr(const int *off) /* &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])) +/* + * Whether 'type' is a signed type or an unsigned type. Supports scalar types, + * bool and also pointer types. + */ +#define is_signed_type(type) (((type)(-1)) < (__force type)1) + /* * This is needed in functions which generate the stack canary, see * arch/x86/kernel/smpboot.c::start_secondary() for an example. -- cgit v1.2.3-59-g8ed1b