[src/trunk]: src/sys/external/bsd/common/include/linux Define __must_check to...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b6b452389f72
branches:  trunk
changeset: 835398:b6b452389f72
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 14:48:07 2018 +0000

description:
Define __must_check to actually use warn_unused_result.

diffstat:

 sys/external/bsd/common/include/linux/kernel.h |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (22 lines):

diff -r a418eeab0358 -r b6b452389f72 sys/external/bsd/common/include/linux/kernel.h
--- a/sys/external/bsd/common/include/linux/kernel.h    Mon Aug 27 14:47:53 2018 +0000
+++ b/sys/external/bsd/common/include/linux/kernel.h    Mon Aug 27 14:48:07 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kernel.h,v 1.20 2018/08/27 13:37:55 riastradh Exp $    */
+/*     $NetBSD: kernel.h,v 1.21 2018/08/27 14:48:07 riastradh Exp $    */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -53,7 +53,11 @@
 
 #define        __printf        __printflike
 #define        __user
-#define        __must_check    /* __attribute__((warn_unused_result)), if GCC */
+#if __GNUC_PREREQ__(4,0)       /* not sure when but this will work */
+#define        __must_check    __attribute__((warn_unused_result))
+#else
+#define        __must_check    /* nothing */
+#endif
 #define        __always_unused __unused
 #define        noinline        __noinline