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authorRusty Russell <rusty@rustcorp.com.au>2009-06-12 21:46:56 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-06-12 21:46:57 +0930
commitd2c123c27db841c6c11a63de9c144823d2b1ba76 (patch)
treeee9de1ca10681c1f632020783e8a31ec61f35c4e
parent45fcc70c0b6ee0c508e1fdb5fef735c3546803f4 (diff)
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: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--include/linux/compiler.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 37bcb50a4d7..04fb5135b4e 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -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(),