svn commit: r296981 - head/sys/arm/arm

[Andrew Turner]

Author: andrew
Date: Thu Mar 17 08:40:58 2016
New Revision: 296981
URL: https://svnweb.freebsd.org/changeset/base/296981

Log:
  Make it an error to build an ARM kernel with COMPAT_FREEBSDn where n < 10.
  We changed the ABI for ARM in 10, an removed support for the old ABI in 11,
  as such binaries from these releases are unable to be run on a head kernel.
  
  Reviewed by:	bz, emast
  Sponsored by:	ABT Systems Ltd
  Differential Revision:	https://reviews.freebsd.org/D5652

Modified:
  head/sys/arm/arm/machdep.c

Modified: head/sys/arm/arm/machdep.c
==============================================================================
--- head/sys/arm/arm/machdep.c	Thu Mar 17 06:23:48 2016	(r296980)
+++ head/sys/arm/arm/machdep.c	Thu Mar 17 08:40:58 2016	(r296981)
@@ -178,6 +178,12 @@ DB_SHOW_COMMAND(vtop, db_show_vtop)
 #define	debugf(fmt, args...)
 #endif
 
+#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
+    defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \
+    defined(COMPAT_FREEBSD9)
+#error FreeBSD/arm doesn't provide compatibility with releases prior to 10
+#endif
+
 struct pcpu __pcpu[MAXCPU];
 struct pcpu *pcpup = &__pcpu[0];