LinuxKPI: add default_gfp()

Various new allocation macros can take an optional gfp_t argument.
If the argument is not given we need to set the GFP_KERNEL default.
While this is only internally used and I initialy called it differently,
should this spread elsewhere having the same name as in Linux will be
good.

Sponsored by:	The FreeBSD Foundaton
MFC after:	3 days
Reviewed by:	dumbbell
Differential Revision: https://reviews.freebsd.org/D56392

1 files changed, 3 insertions, 0 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/gfp.h b/sys/compat/linuxkpi/common/include/linux/gfp.h
index 7a32e7862338..af7cdb422fcb 100644
--- a/sys/compat/linuxkpi/common/include/linux/gfp.h
+++ b/sys/compat/linuxkpi/common/include/linux/gfp.h
@@ -80,6 +80,9 @@
 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0);
 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK);
 
+#define	__default_gfp(_discard, _arg_or_default, ...)	_arg_or_default
+#define	default_gfp(...)	__default_gfp(, ##__VA_ARGS__, GFP_KERNEL)
+
 struct page_frag_cache {
 	void *va;
 	int pagecnt_bias;