mm: hugetlb: fix hugepage memory leak caused by wrong reserve count
[linux/fpc-iii.git] / arch / ia64 / include / asm / sn / mspec.h
blobc1d3c50c3223758f3bb48e518f90fa631df8ec08
1 /*
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
7 * Copyright (c) 2001-2008 Silicon Graphics, Inc. All rights reserved.
8 */
10 #ifndef _ASM_IA64_SN_MSPEC_H
11 #define _ASM_IA64_SN_MSPEC_H
13 #define FETCHOP_VAR_SIZE 64 /* 64 byte per fetchop variable */
15 #define FETCHOP_LOAD 0
16 #define FETCHOP_INCREMENT 8
17 #define FETCHOP_DECREMENT 16
18 #define FETCHOP_CLEAR 24
20 #define FETCHOP_STORE 0
21 #define FETCHOP_AND 24
22 #define FETCHOP_OR 32
24 #define FETCHOP_CLEAR_CACHE 56
26 #define FETCHOP_LOAD_OP(addr, op) ( \
27 *(volatile long *)((char*) (addr) + (op)))
29 #define FETCHOP_STORE_OP(addr, op, x) ( \
30 *(volatile long *)((char*) (addr) + (op)) = (long) (x))
32 #ifdef __KERNEL__
35 * Each Atomic Memory Operation (amo, formerly known as fetchop)
36 * variable is 64 bytes long. The first 8 bytes are used. The
37 * remaining 56 bytes are unaddressable due to the operation taking
38 * that portion of the address.
40 * NOTE: The amo structure _MUST_ be placed in either the first or second
41 * half of the cache line. The cache line _MUST NOT_ be used for anything
42 * other than additional amo entries. This is because there are two
43 * addresses which reference the same physical cache line. One will
44 * be a cached entry with the memory type bits all set. This address
45 * may be loaded into processor cache. The amo will be referenced
46 * uncached via the memory special memory type. If any portion of the
47 * cached cache-line is modified, when that line is flushed, it will
48 * overwrite the uncached value in physical memory and lead to
49 * inconsistency.
51 struct amo {
52 u64 variable;
53 u64 unused[7];
57 #endif /* __KERNEL__ */
59 #endif /* _ASM_IA64_SN_MSPEC_H */