module_param: add __same_type convenience wrapper for __builtin_types_compatible_p (d2c123c2) · Commits · 戴 / test

Impact: new API __builtin_types_compatible_p() is a little awkward to use: it takes two types rather than types or variables, and it's just damn long. (typeof(type) == type, so this works on types as well as vars). Signed-off-by:

Rusty Russell <rusty@rustcorp.com.au>

include/linux/compiler.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -261,6 +261,11 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
		# define __section(S) __attribute__ ((__section__(#S)))
		#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

		/*
		* Prevent the compiler from merging or refetching accesses. The compiler
		* is also forbidden from reordering successive instances of ACCESS_ONCE(),

Admin message