/* $NetBSD: gfp.h,v 1.3 2021/12/19 11:03:32 riastradh Exp $ */ /*- * Copyright (c) 2013 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Taylor R. Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _LINUX_GFP_H_ #define _LINUX_GFP_H_ /* GFP: `Get Free Page' */ #include <sys/param.h> #include <sys/cdefs.h> typedef int gfp_t; #define GFP_ATOMIC (__GFP_HIGH) #define GFP_DMA32 (__GFP_DMA32) #define GFP_HIGHUSER (__GFP_FS | __GFP_HARDWALL | __GFP_HIGHMEM | \ __GFP_IO | __GFP_WAIT) #define GFP_KERNEL (__GFP_FS | __GFP_IO | __GFP_WAIT) #define GFP_TEMPORARY (__GFP_FS | __GFP_IO | __GFP_RECLAIMABLE | __GFP_WAIT) #define GFP_USER (__GFP_FS | __GFP_HARDWALL | __GFP_IO | __GFP_WAIT) #define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH) #define __GFP_COMP __BIT(0) #define __GFP_DMA32 __BIT(1) #define __GFP_FS __BIT(2) #define __GFP_HARDWALL __BIT(3) #define __GFP_HIGH __BIT(4) #define __GFP_HIGHMEM __BIT(5) #define __GFP_IO __BIT(6) #define __GFP_NORETRY __BIT(7) #define __GFP_NOWARN __BIT(8) #define __GFP_NO_KSWAPD __BIT(9) #define __GFP_RECLAIMABLE __BIT(10) #define __GFP_WAIT __BIT(11) #define __GFP_ZERO __BIT(12) /* * XXX Linux sez nobody should be using this in new code. We never * fail in the wait case anyway, so the point is moot. */ #define __GFP_NOFAIL 0 /* * Pretend these are the same. __GFP_RETRY_MAYFAIL is supposed to do * more than just __GFP_NORETRY, but should not hang forever like * __GFP_WAIT. */ #define __GFP_RETRY_MAYFAIL __GFP_NORETRY struct page; static inline bool gfpflags_allow_blocking(gfp_t gfp) { return (gfp & (__GFP_WAIT|__GFP_NORETRY)) == __GFP_WAIT; } #endif /* _LINUX_GFP_H_ */ |