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Commit d2c123c2 authored by Rusty Russell's avatar Rusty Russell
Browse files

module_param: add __same_type convenience wrapper for __builtin_types_compatible_p 



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: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 45fcc70c

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(),