[src/trunk]: src/sys/external/bsd/drm2/include/linux Add kstrndup.

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

details:   https://anonhg.NetBSD.org/src/rev/fc6de2d88f1b
branches:  trunk
changeset: 806459:fc6de2d88f1b
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Wed Feb 25 14:55:57 2015 +0000

description:
Add kstrndup.

diffstat:

 sys/external/bsd/drm2/include/linux/string.h |  22 +++++++++++++++++++++-
 1 files changed, 21 insertions(+), 1 deletions(-)

diffs (34 lines):

diff -r 7773357074af -r fc6de2d88f1b sys/external/bsd/drm2/include/linux/string.h
--- a/sys/external/bsd/drm2/include/linux/string.h      Wed Feb 25 14:51:22 2015 +0000
+++ b/sys/external/bsd/drm2/include/linux/string.h      Wed Feb 25 14:55:57 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: string.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $     */
+/*     $NetBSD: string.h,v 1.4 2015/02/25 14:55:57 riastradh Exp $     */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -64,4 +64,24 @@
        return dst;
 }
 
+static inline char *
+kstrndup(const char *src, size_t maxlen, gfp_t gfp)
+{
+       char *dst;
+       size_t len;
+
+       if (src == NULL)
+               return NULL;
+
+       len = strnlen(src, maxlen);
+       dst = kmalloc(len + 1, gfp);
+       if (dst == NULL)
+               return NULL;
+
+       (void)memcpy(dst, src, len);
+       dst[len] = '\0';
+
+       return dst;
+}
+
 #endif  /* _LINUX_STRING_H_ */