svn commit: r312942 - head/sys/sys

[Pedro F. Giffuni]

Author: pfg
Date: Sun Jan 29 00:45:52 2017
New Revision: 312942
URL: https://svnweb.freebsd.org/changeset/base/312942

Log:
  Remove GCC's __nonnull() attribute definition.
  
  While GCC's __nonnull__ attribute is generally useful to prevent misuse of
  some functions it also tends to do rather dangerous "optimizations". Now
  that we have replaced (r312934) all such uses with the clang nullability
  qualifiers, the GCC attribute is unnecessary.
  
  Remove the definition completely to prevent its use in system's headers.

Modified:
  head/sys/sys/cdefs.h

Modified: head/sys/sys/cdefs.h
==============================================================================
--- head/sys/sys/cdefs.h	Sun Jan 29 00:24:34 2017	(r312941)
+++ head/sys/sys/cdefs.h	Sun Jan 29 00:45:52 2017	(r312942)
@@ -375,14 +375,6 @@
 #define	__noinline
 #endif
 
-#if __GNUC_PREREQ__(3, 3)
-#define	__nonnull(x)	__attribute__((__nonnull__(x)))
-#define	__nonnull_all	__attribute__((__nonnull__))
-#else
-#define	__nonnull(x)
-#define	__nonnull_all
-#endif
-
 #if __GNUC_PREREQ__(3, 4)
 #define	__fastcall	__attribute__((__fastcall__))
 #define	__result_use_check	__attribute__((__warn_unused_result__))