* [PATCH 3/5] module_param: add __same_type convenience wrapper for __builtin_types_compatible_p
@ 2009-03-28 13:23 Rusty Russell
0 siblings, 0 replies; only message in thread
From: Rusty Russell @ 2009-03-28 13:23 UTC (permalink / raw)
To: linux-kernel; +Cc: Andrew Morton
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 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -260,6 +260,11 @@ void ftrace_likely_update(struct ftrace_
# 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(),
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2009-03-28 13:24 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-03-28 13:23 [PATCH 3/5] module_param: add __same_type convenience wrapper for __builtin_types_compatible_p Rusty Russell
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox