svn commit: r329513 - head/sys/compat/linuxkpi/common/include/linux

[Hans Petter Selasky]

Author: hselasky
Date: Sun Feb 18 08:58:20 2018
New Revision: 329513
URL: https://svnweb.freebsd.org/changeset/base/329513

Log:
  Implement __GFP_BITS_SHIFT and __GFP_BITS_MASK macros in the LinuxKPI.
  Add compile time asserts to catch conflicts with native defines.
  
  MFC after:	1 week
  Submitted by:	Johannes Lundberg <johalun0 at gmail.com>
  Sponsored by:	Mellanox Technologies
  Sponsored by:	Limelight Networks

Modified:
  head/sys/compat/linuxkpi/common/include/linux/gfp.h

Modified: head/sys/compat/linuxkpi/common/include/linux/gfp.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/gfp.h	Sun Feb 18 08:47:15 2018	(r329512)
+++ head/sys/compat/linuxkpi/common/include/linux/gfp.h	Sun Feb 18 08:58:20 2018	(r329513)
@@ -54,6 +54,8 @@
 #define	__GFP_NO_KSWAPD	0
 #define	__GFP_WAIT	M_WAITOK
 #define	__GFP_DMA32	(1U << 24) /* LinuxKPI only */
+#define	__GFP_BITS_SHIFT 25
+#define	__GFP_BITS_MASK	((1 << __GFP_BITS_SHIFT) - 1)
 
 #define	GFP_NOWAIT	M_NOWAIT
 #define	GFP_ATOMIC	(M_NOWAIT | M_USE_RESERVE)
@@ -66,6 +68,9 @@
 #define	GFP_DMA32	__GFP_DMA32
 #define	GFP_TEMPORARY	M_NOWAIT
 #define	GFP_NATIVE_MASK	(M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO)
+
+CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0);
+CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK);
 
 /*
  * Resolve a page into a virtual address: