[src/trunk]: src/sys/external/bsd/common/include/linux Implement Linux kaspri...

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

details:   https://anonhg.NetBSD.org/src/rev/e83b4939571c
branches:  trunk
changeset: 992494:e83b4939571c
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 06:46:55 2018 +0000

description:
Implement Linux kasprintf.

diffstat:

 sys/external/bsd/common/include/linux/kernel.h |  27 +++++++++++++++++++++++++-
 1 files changed, 26 insertions(+), 1 deletions(-)

diffs (46 lines):

diff -r e8f59a918e90 -r e83b4939571c sys/external/bsd/common/include/linux/kernel.h
--- a/sys/external/bsd/common/include/linux/kernel.h    Mon Aug 27 06:46:32 2018 +0000
+++ b/sys/external/bsd/common/include/linux/kernel.h    Mon Aug 27 06:46:55 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kernel.h,v 1.13 2018/08/27 06:15:32 riastradh Exp $    */
+/*     $NetBSD: kernel.h,v 1.14 2018/08/27 06:46:55 riastradh Exp $    */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -40,6 +40,7 @@
 #include <lib/libkern/libkern.h>
 #include <linux/bitops.h>
 #include <linux/printk.h>
+#include <linux/slab.h>
 
 #define U16_MAX UINT16_MAX
 #define U32_MAX UINT32_MAX
@@ -179,4 +180,28 @@
        return 0;
 }
 
+static inline char * __printflike(2,3)
+kasprintf(gfp_t gfp, const char *fmt, ...)
+{
+       va_list va;
+       char *str;
+       int len, len1 __diagused;
+
+       va_start(va, fmt);
+       len = vsnprintf(NULL, 0, fmt, va);
+       va_end(va);
+
+       str = kmalloc(len + 1, gfp);
+       if (str == NULL)
+               return NULL;
+
+       va_start(va, fmt);
+       len1 = vsnprintf(str, len + 1, fmt, va);
+       va_end(va);
+
+       KASSERT(len1 == len);
+
+       return str;
+}
+
 #endif  /* _LINUX_KERNEL_H_ */