Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (c) 2001-2005 Anton Altaparmakov
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #ifndef _LINUX_NTFS_MALLOC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #define _LINUX_NTFS_MALLOC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * __ntfs_malloc - allocate memory in multiples of pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * @size:	number of bytes to allocate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * @gfp_mask:	extra flags for the allocator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * Internal function.  You probably want ntfs_malloc_nofs()...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * returns a pointer to the allocated memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * If there was insufficient memory to complete the request, return NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  * Depending on @gfp_mask the allocation may be guaranteed to succeed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if (likely(size <= PAGE_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		BUG_ON(!size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		/* kmalloc() has per-CPU caches so is faster for now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		/* return (void *)__get_free_page(gfp_mask); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	if (likely((size >> PAGE_SHIFT) < totalram_pages()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		return __vmalloc(size, gfp_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)  * ntfs_malloc_nofs - allocate memory in multiples of pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)  * @size:	number of bytes to allocate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)  * returns a pointer to the allocated memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  * If there was insufficient memory to complete the request, return NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static inline void *ntfs_malloc_nofs(unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)  * ntfs_malloc_nofs_nofail - allocate memory in multiples of pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)  * @size:	number of bytes to allocate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)  * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)  * returns a pointer to the allocated memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)  * This function guarantees that the allocation will succeed.  It will sleep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)  * for as long as it takes to complete the allocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)  * If there was insufficient memory to complete the request, return NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static inline void *ntfs_malloc_nofs_nofail(unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM | __GFP_NOFAIL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static inline void ntfs_free(void *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	kvfree(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #endif /* _LINUX_NTFS_MALLOC_H */