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- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
- *
- * Copyright (c) 2001-2005 Anton Altaparmakov
- */
- #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) < totalram_pages()))
- return __vmalloc(size, gfp_mask);
- 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)
- {
- kvfree(addr);
- }
- #endif /* _LINUX_NTFS_MALLOC_H */
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