svn commit: r329447 - head/sys/compat/linuxkpi/common/include/asm

[Hans Petter Selasky]

Author: hselasky
Date: Sat Feb 17 08:12:35 2018
New Revision: 329447
URL: https://svnweb.freebsd.org/changeset/base/329447

Log:
  Compile fix for GCC in the LinuxKPI.
  
  Older versions of GCC don't allow flexible array members in a union.
  Use a zero length array instead.
  
  MFC after:	1 week
  Reported by:	jbeich@
  Sponsored by:	Mellanox Technologies

Modified:
  head/sys/compat/linuxkpi/common/include/asm/atomic.h

Modified: head/sys/compat/linuxkpi/common/include/asm/atomic.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/asm/atomic.h	Sat Feb 17 06:57:43 2018	(r329446)
+++ head/sys/compat/linuxkpi/common/include/asm/atomic.h	Sat Feb 17 08:12:35 2018	(r329447)
@@ -162,10 +162,10 @@ atomic_cmpxchg(atomic_t *v, int old, int new)
 #define	cmpxchg(ptr, old, new) ({					\
 	union {								\
 		__typeof(*(ptr)) val;					\
-		u8 u8[];						\
-		u16 u16[];						\
-		u32 u32[];						\
-		u64 u64[];						\
+		u8 u8[0];						\
+		u16 u16[0];						\
+		u32 u32[0];						\
+		u64 u64[0];						\
 	} __ret = { .val = (old) }, __new = { .val = (new) };		\
 									\
 	CTASSERT(sizeof(__ret.val) == 1 || sizeof(__ret.val) == 2 ||	\