dd0fc66fb3
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/*
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* malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001-2005 Anton Altaparmakov
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program/include file is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the Linux-NTFS
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* distribution in the file COPYING); if not, write to the Free Software
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* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LINUX_NTFS_MALLOC_H
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#define _LINUX_NTFS_MALLOC_H
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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/**
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* __ntfs_malloc - allocate memory in multiples of pages
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* @size: number of bytes to allocate
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* @gfp_mask: extra flags for the allocator
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*
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* Internal function. You probably want ntfs_malloc_nofs()...
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*
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* Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
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* returns a pointer to the allocated memory.
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*
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* If there was insufficient memory to complete the request, return NULL.
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* Depending on @gfp_mask the allocation may be guaranteed to succeed.
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*/
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static inline void *__ntfs_malloc(unsigned long size,
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gfp_t gfp_mask)
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{
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if (likely(size <= PAGE_SIZE)) {
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BUG_ON(!size);
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/* kmalloc() has per-CPU caches so is faster for now. */
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return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
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/* return (void *)__get_free_page(gfp_mask); */
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}
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if (likely(size >> PAGE_SHIFT < num_physpages))
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return __vmalloc(size, gfp_mask, PAGE_KERNEL);
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return NULL;
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}
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/**
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* ntfs_malloc_nofs - allocate memory in multiples of pages
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* @size: number of bytes to allocate
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*
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* Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
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* returns a pointer to the allocated memory.
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*
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* If there was insufficient memory to complete the request, return NULL.
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*/
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static inline void *ntfs_malloc_nofs(unsigned long size)
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{
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return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM);
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}
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/**
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* ntfs_malloc_nofs_nofail - allocate memory in multiples of pages
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* @size: number of bytes to allocate
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*
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* Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
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* returns a pointer to the allocated memory.
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*
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* This function guarantees that the allocation will succeed. It will sleep
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* for as long as it takes to complete the allocation.
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*
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* If there was insufficient memory to complete the request, return NULL.
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*/
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static inline void *ntfs_malloc_nofs_nofail(unsigned long size)
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{
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return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM | __GFP_NOFAIL);
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}
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static inline void ntfs_free(void *addr)
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{
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if (likely(((unsigned long)addr < VMALLOC_START) ||
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((unsigned long)addr >= VMALLOC_END ))) {
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kfree(addr);
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/* free_page((unsigned long)addr); */
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return;
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}
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vfree(addr);
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}
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#endif /* _LINUX_NTFS_MALLOC_H */
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