/* * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project. * * Copyright (c) 2001-2005 Anton Altaparmakov * * This program/include file is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program/include file is distributed in the hope that it will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */ #ifndef _LINUX_NTFS_MALLOC_H#define _LINUX_NTFS_MALLOC_H #include <linux/vmalloc.h>#include <linux/slab.h>#include <linux/highmem.h> /** * __ntfs_malloc - allocate memory in multiples of pages * @size:	number of bytes to allocate * @gfp_mask:	extra flags for the allocator * * Internal function.  You probably want ntfs_malloc_nofs()... * * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and * returns a pointer to the allocated memory. * * If there was insufficient memory to complete the request, return NULL. * Depending on @gfp_mask the allocation may be guaranteed to succeed. */static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask){	if (likely(size <= PAGE_SIZE)) {		BUG_ON(!size);		/* kmalloc() has per-CPU caches so is faster for now. */		return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);		/* return (void *)__get_free_page(gfp_mask); */	}	if (likely(size >> PAGE_SHIFT < num_physpages))		return __vmalloc(size, gfp_mask, PAGE_KERNEL);	return NULL;} /** * ntfs_malloc_nofs - allocate memory in multiples of pages * @size:	number of bytes to allocate * * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and * returns a pointer to the allocated memory. * * If there was insufficient memory to complete the request, return NULL. */static inline void *ntfs_malloc_nofs(unsigned long size){	return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM);} /** * ntfs_malloc_nofs_nofail - allocate memory in multiples of pages * @size:	number of bytes to allocate * * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and * returns a pointer to the allocated memory. * * This function guarantees that the allocation will succeed.  It will sleep * for as long as it takes to complete the allocation. * * If there was insufficient memory to complete the request, return NULL. */static inline void *ntfs_malloc_nofs_nofail(unsigned long size){	return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM | __GFP_NOFAIL);} static inline void ntfs_free(void *addr){	if (likely(((unsigned long)addr < VMALLOC_START) ||			((unsigned long)addr >= VMALLOC_END ))) {		kfree(addr);		/* free_page((unsigned long)addr); */		return;	}	vfree(addr);} #endif /* _LINUX_NTFS_MALLOC_H */