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Commit c85b04c3749507546f6d5868976e4793e35c2ec0

Authored by Jeremy Fitzhardinge
Committed by Jeremy Fitzhardinge
1 parent e738fca8d7
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

xen: add pinned page flag 

Add a new definition for PG_owner_priv_1 to define PG_pinned on Xen
pagetable pages.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

Showing 1 changed file with 5 additions and 0 deletions Inline Diff

include/linux/page-flags.h
Diff comments   View file @ c85b04c
1 /* 1 /*
2 * Macros for manipulating and testing page->flags 2 * Macros for manipulating and testing page->flags
3 */ 3 */
4 4
5 #ifndef PAGE_FLAGS_H 5 #ifndef PAGE_FLAGS_H
6 #define PAGE_FLAGS_H 6 #define PAGE_FLAGS_H
7 7
8 #include <linux/types.h> 8 #include <linux/types.h>
9 #include <linux/mm_types.h> 9 #include <linux/mm_types.h>
10 10
11 /* 11 /*
12 * Various page->flags bits: 12 * Various page->flags bits:
13 * 13 *
14 * PG_reserved is set for special pages, which can never be swapped out. Some 14 * PG_reserved is set for special pages, which can never be swapped out. Some
15 * of them might not even exist (eg empty_bad_page)... 15 * of them might not even exist (eg empty_bad_page)...
16 * 16 *
17 * The PG_private bitflag is set on pagecache pages if they contain filesystem 17 * The PG_private bitflag is set on pagecache pages if they contain filesystem
18 * specific data (which is normally at page->private). It can be used by 18 * specific data (which is normally at page->private). It can be used by
19 * private allocations for its own usage. 19 * private allocations for its own usage.
20 * 20 *
21 * During initiation of disk I/O, PG_locked is set. This bit is set before I/O 21 * During initiation of disk I/O, PG_locked is set. This bit is set before I/O
22 * and cleared when writeback _starts_ or when read _completes_. PG_writeback 22 * and cleared when writeback _starts_ or when read _completes_. PG_writeback
23 * is set before writeback starts and cleared when it finishes. 23 * is set before writeback starts and cleared when it finishes.
24 * 24 *
25 * PG_locked also pins a page in pagecache, and blocks truncation of the file 25 * PG_locked also pins a page in pagecache, and blocks truncation of the file
26 * while it is held. 26 * while it is held.
27 * 27 *
28 * page_waitqueue(page) is a wait queue of all tasks waiting for the page 28 * page_waitqueue(page) is a wait queue of all tasks waiting for the page
29 * to become unlocked. 29 * to become unlocked.
30 * 30 *
31 * PG_uptodate tells whether the page's contents is valid. When a read 31 * PG_uptodate tells whether the page's contents is valid. When a read
32 * completes, the page becomes uptodate, unless a disk I/O error happened. 32 * completes, the page becomes uptodate, unless a disk I/O error happened.
33 * 33 *
34 * PG_referenced, PG_reclaim are used for page reclaim for anonymous and 34 * PG_referenced, PG_reclaim are used for page reclaim for anonymous and
35 * file-backed pagecache (see mm/vmscan.c). 35 * file-backed pagecache (see mm/vmscan.c).
36 * 36 *
37 * PG_error is set to indicate that an I/O error occurred on this page. 37 * PG_error is set to indicate that an I/O error occurred on this page.
38 * 38 *
39 * PG_arch_1 is an architecture specific page state bit. The generic code 39 * PG_arch_1 is an architecture specific page state bit. The generic code
40 * guarantees that this bit is cleared for a page when it first is entered into 40 * guarantees that this bit is cleared for a page when it first is entered into
41 * the page cache. 41 * the page cache.
42 * 42 *
43 * PG_highmem pages are not permanently mapped into the kernel virtual address 43 * PG_highmem pages are not permanently mapped into the kernel virtual address
44 * space, they need to be kmapped separately for doing IO on the pages. The 44 * space, they need to be kmapped separately for doing IO on the pages. The
45 * struct page (these bits with information) are always mapped into kernel 45 * struct page (these bits with information) are always mapped into kernel
46 * address space... 46 * address space...
47 * 47 *
48 * PG_buddy is set to indicate that the page is free and in the buddy system 48 * PG_buddy is set to indicate that the page is free and in the buddy system
49 * (see mm/page_alloc.c). 49 * (see mm/page_alloc.c).
50 * 50 *
51 */ 51 */
52 52
53 /* 53 /*
54 * Don't use the *_dontuse flags. Use the macros. Otherwise you'll break 54 * Don't use the *_dontuse flags. Use the macros. Otherwise you'll break
55 * locked- and dirty-page accounting. 55 * locked- and dirty-page accounting.
56 * 56 *
57 * The page flags field is split into two parts, the main flags area 57 * The page flags field is split into two parts, the main flags area
58 * which extends from the low bits upwards, and the fields area which 58 * which extends from the low bits upwards, and the fields area which
59 * extends from the high bits downwards. 59 * extends from the high bits downwards.
60 * 60 *
61 * | FIELD | ... | FLAGS | 61 * | FIELD | ... | FLAGS |
62 * N-1 ^ 0 62 * N-1 ^ 0
63 * (N-FLAGS_RESERVED) 63 * (N-FLAGS_RESERVED)
64 * 64 *
65 * The fields area is reserved for fields mapping zone, node and SPARSEMEM 65 * The fields area is reserved for fields mapping zone, node and SPARSEMEM
66 * section. The boundry between these two areas is defined by 66 * section. The boundry between these two areas is defined by
67 * FLAGS_RESERVED which defines the width of the fields section 67 * FLAGS_RESERVED which defines the width of the fields section
68 * (see linux/mmzone.h). New flags must _not_ overlap with this area. 68 * (see linux/mmzone.h). New flags must _not_ overlap with this area.
69 */ 69 */
70 #define PG_locked 0 /* Page is locked. Don't touch. */ 70 #define PG_locked 0 /* Page is locked. Don't touch. */
71 #define PG_error 1 71 #define PG_error 1
72 #define PG_referenced 2 72 #define PG_referenced 2
73 #define PG_uptodate 3 73 #define PG_uptodate 3
74 74
75 #define PG_dirty 4 75 #define PG_dirty 4
76 #define PG_lru 5 76 #define PG_lru 5
77 #define PG_active 6 77 #define PG_active 6
78 #define PG_slab 7 /* slab debug (Suparna wants this) */ 78 #define PG_slab 7 /* slab debug (Suparna wants this) */
79 79
80 #define PG_owner_priv_1 8 /* Owner use. If pagecache, fs may use*/ 80 #define PG_owner_priv_1 8 /* Owner use. If pagecache, fs may use*/
81 #define PG_arch_1 9 81 #define PG_arch_1 9
82 #define PG_reserved 10 82 #define PG_reserved 10
83 #define PG_private 11 /* If pagecache, has fs-private data */ 83 #define PG_private 11 /* If pagecache, has fs-private data */
84 84
85 #define PG_writeback 12 /* Page is under writeback */ 85 #define PG_writeback 12 /* Page is under writeback */
86 #define PG_compound 14 /* Part of a compound page */ 86 #define PG_compound 14 /* Part of a compound page */
87 #define PG_swapcache 15 /* Swap page: swp_entry_t in private */ 87 #define PG_swapcache 15 /* Swap page: swp_entry_t in private */
88 88
89 #define PG_mappedtodisk 16 /* Has blocks allocated on-disk */ 89 #define PG_mappedtodisk 16 /* Has blocks allocated on-disk */
90 #define PG_reclaim 17 /* To be reclaimed asap */ 90 #define PG_reclaim 17 /* To be reclaimed asap */
91 #define PG_buddy 19 /* Page is free, on buddy lists */ 91 #define PG_buddy 19 /* Page is free, on buddy lists */
92 92
93 /* PG_owner_priv_1 users should have descriptive aliases */ 93 /* PG_owner_priv_1 users should have descriptive aliases */
94 #define PG_checked PG_owner_priv_1 /* Used by some filesystems */ 94 #define PG_checked PG_owner_priv_1 /* Used by some filesystems */
95 #define PG_pinned PG_owner_priv_1 /* Xen pinned pagetable */
95 96
96 #if (BITS_PER_LONG > 32) 97 #if (BITS_PER_LONG > 32)
97 /* 98 /*
98 * 64-bit-only flags build down from bit 31 99 * 64-bit-only flags build down from bit 31
99 * 100 *
100 * 32 bit -------------------------------| FIELDS | FLAGS | 101 * 32 bit -------------------------------| FIELDS | FLAGS |
101 * 64 bit | FIELDS | ?????? FLAGS | 102 * 64 bit | FIELDS | ?????? FLAGS |
102 * 63 32 0 103 * 63 32 0
103 */ 104 */
104 #define PG_uncached 31 /* Page has been mapped as uncached */ 105 #define PG_uncached 31 /* Page has been mapped as uncached */
105 #endif 106 #endif
106 107
107 /* 108 /*
108 * Manipulation of page state flags 109 * Manipulation of page state flags
109 */ 110 */
110 #define PageLocked(page) \ 111 #define PageLocked(page) \
111 test_bit(PG_locked, &(page)->flags) 112 test_bit(PG_locked, &(page)->flags)
112 #define SetPageLocked(page) \ 113 #define SetPageLocked(page) \
113 set_bit(PG_locked, &(page)->flags) 114 set_bit(PG_locked, &(page)->flags)
114 #define TestSetPageLocked(page) \ 115 #define TestSetPageLocked(page) \
115 test_and_set_bit(PG_locked, &(page)->flags) 116 test_and_set_bit(PG_locked, &(page)->flags)
116 #define ClearPageLocked(page) \ 117 #define ClearPageLocked(page) \
117 clear_bit(PG_locked, &(page)->flags) 118 clear_bit(PG_locked, &(page)->flags)
118 #define TestClearPageLocked(page) \ 119 #define TestClearPageLocked(page) \
119 test_and_clear_bit(PG_locked, &(page)->flags) 120 test_and_clear_bit(PG_locked, &(page)->flags)
120 121
121 #define PageError(page) test_bit(PG_error, &(page)->flags) 122 #define PageError(page) test_bit(PG_error, &(page)->flags)
122 #define SetPageError(page) set_bit(PG_error, &(page)->flags) 123 #define SetPageError(page) set_bit(PG_error, &(page)->flags)
123 #define ClearPageError(page) clear_bit(PG_error, &(page)->flags) 124 #define ClearPageError(page) clear_bit(PG_error, &(page)->flags)
124 125
125 #define PageReferenced(page) test_bit(PG_referenced, &(page)->flags) 126 #define PageReferenced(page) test_bit(PG_referenced, &(page)->flags)
126 #define SetPageReferenced(page) set_bit(PG_referenced, &(page)->flags) 127 #define SetPageReferenced(page) set_bit(PG_referenced, &(page)->flags)
127 #define ClearPageReferenced(page) clear_bit(PG_referenced, &(page)->flags) 128 #define ClearPageReferenced(page) clear_bit(PG_referenced, &(page)->flags)
128 #define TestClearPageReferenced(page) test_and_clear_bit(PG_referenced, &(page)->flags) 129 #define TestClearPageReferenced(page) test_and_clear_bit(PG_referenced, &(page)->flags)
129 130
130 #define PageUptodate(page) test_bit(PG_uptodate, &(page)->flags) 131 #define PageUptodate(page) test_bit(PG_uptodate, &(page)->flags)
131 #ifdef CONFIG_S390 132 #ifdef CONFIG_S390
132 static inline void SetPageUptodate(struct page *page) 133 static inline void SetPageUptodate(struct page *page)
133 { 134 {
134 if (!test_and_set_bit(PG_uptodate, &page->flags)) 135 if (!test_and_set_bit(PG_uptodate, &page->flags))
135 page_clear_dirty(page); 136 page_clear_dirty(page);
136 } 137 }
137 #else 138 #else
138 #define SetPageUptodate(page) set_bit(PG_uptodate, &(page)->flags) 139 #define SetPageUptodate(page) set_bit(PG_uptodate, &(page)->flags)
139 #endif 140 #endif
140 #define ClearPageUptodate(page) clear_bit(PG_uptodate, &(page)->flags) 141 #define ClearPageUptodate(page) clear_bit(PG_uptodate, &(page)->flags)
141 142
142 #define PageDirty(page) test_bit(PG_dirty, &(page)->flags) 143 #define PageDirty(page) test_bit(PG_dirty, &(page)->flags)
143 #define SetPageDirty(page) set_bit(PG_dirty, &(page)->flags) 144 #define SetPageDirty(page) set_bit(PG_dirty, &(page)->flags)
144 #define TestSetPageDirty(page) test_and_set_bit(PG_dirty, &(page)->flags) 145 #define TestSetPageDirty(page) test_and_set_bit(PG_dirty, &(page)->flags)
145 #define ClearPageDirty(page) clear_bit(PG_dirty, &(page)->flags) 146 #define ClearPageDirty(page) clear_bit(PG_dirty, &(page)->flags)
146 #define __ClearPageDirty(page) __clear_bit(PG_dirty, &(page)->flags) 147 #define __ClearPageDirty(page) __clear_bit(PG_dirty, &(page)->flags)
147 #define TestClearPageDirty(page) test_and_clear_bit(PG_dirty, &(page)->flags) 148 #define TestClearPageDirty(page) test_and_clear_bit(PG_dirty, &(page)->flags)
148 149
149 #define PageLRU(page) test_bit(PG_lru, &(page)->flags) 150 #define PageLRU(page) test_bit(PG_lru, &(page)->flags)
150 #define SetPageLRU(page) set_bit(PG_lru, &(page)->flags) 151 #define SetPageLRU(page) set_bit(PG_lru, &(page)->flags)
151 #define ClearPageLRU(page) clear_bit(PG_lru, &(page)->flags) 152 #define ClearPageLRU(page) clear_bit(PG_lru, &(page)->flags)
152 #define __ClearPageLRU(page) __clear_bit(PG_lru, &(page)->flags) 153 #define __ClearPageLRU(page) __clear_bit(PG_lru, &(page)->flags)
153 154
154 #define PageActive(page) test_bit(PG_active, &(page)->flags) 155 #define PageActive(page) test_bit(PG_active, &(page)->flags)
155 #define SetPageActive(page) set_bit(PG_active, &(page)->flags) 156 #define SetPageActive(page) set_bit(PG_active, &(page)->flags)
156 #define ClearPageActive(page) clear_bit(PG_active, &(page)->flags) 157 #define ClearPageActive(page) clear_bit(PG_active, &(page)->flags)
157 #define __ClearPageActive(page) __clear_bit(PG_active, &(page)->flags) 158 #define __ClearPageActive(page) __clear_bit(PG_active, &(page)->flags)
158 159
159 #define PageSlab(page) test_bit(PG_slab, &(page)->flags) 160 #define PageSlab(page) test_bit(PG_slab, &(page)->flags)
160 #define __SetPageSlab(page) __set_bit(PG_slab, &(page)->flags) 161 #define __SetPageSlab(page) __set_bit(PG_slab, &(page)->flags)
161 #define __ClearPageSlab(page) __clear_bit(PG_slab, &(page)->flags) 162 #define __ClearPageSlab(page) __clear_bit(PG_slab, &(page)->flags)
162 163
163 #ifdef CONFIG_HIGHMEM 164 #ifdef CONFIG_HIGHMEM
164 #define PageHighMem(page) is_highmem(page_zone(page)) 165 #define PageHighMem(page) is_highmem(page_zone(page))
165 #else 166 #else
166 #define PageHighMem(page) 0 /* needed to optimize away at compile time */ 167 #define PageHighMem(page) 0 /* needed to optimize away at compile time */
167 #endif 168 #endif
168 169
169 #define PageChecked(page) test_bit(PG_checked, &(page)->flags) 170 #define PageChecked(page) test_bit(PG_checked, &(page)->flags)
170 #define SetPageChecked(page) set_bit(PG_checked, &(page)->flags) 171 #define SetPageChecked(page) set_bit(PG_checked, &(page)->flags)
171 #define ClearPageChecked(page) clear_bit(PG_checked, &(page)->flags) 172 #define ClearPageChecked(page) clear_bit(PG_checked, &(page)->flags)
173
174 #define PagePinned(page) test_bit(PG_pinned, &(page)->flags)
175 #define SetPagePinned(page) set_bit(PG_pinned, &(page)->flags)
176 #define ClearPagePinned(page) clear_bit(PG_pinned, &(page)->flags)
172 177
173 #define PageReserved(page) test_bit(PG_reserved, &(page)->flags) 178 #define PageReserved(page) test_bit(PG_reserved, &(page)->flags)
174 #define SetPageReserved(page) set_bit(PG_reserved, &(page)->flags) 179 #define SetPageReserved(page) set_bit(PG_reserved, &(page)->flags)
175 #define ClearPageReserved(page) clear_bit(PG_reserved, &(page)->flags) 180 #define ClearPageReserved(page) clear_bit(PG_reserved, &(page)->flags)
176 #define __ClearPageReserved(page) __clear_bit(PG_reserved, &(page)->flags) 181 #define __ClearPageReserved(page) __clear_bit(PG_reserved, &(page)->flags)
177 182
178 #define SetPagePrivate(page) set_bit(PG_private, &(page)->flags) 183 #define SetPagePrivate(page) set_bit(PG_private, &(page)->flags)
179 #define ClearPagePrivate(page) clear_bit(PG_private, &(page)->flags) 184 #define ClearPagePrivate(page) clear_bit(PG_private, &(page)->flags)
180 #define PagePrivate(page) test_bit(PG_private, &(page)->flags) 185 #define PagePrivate(page) test_bit(PG_private, &(page)->flags)
181 #define __SetPagePrivate(page) __set_bit(PG_private, &(page)->flags) 186 #define __SetPagePrivate(page) __set_bit(PG_private, &(page)->flags)
182 #define __ClearPagePrivate(page) __clear_bit(PG_private, &(page)->flags) 187 #define __ClearPagePrivate(page) __clear_bit(PG_private, &(page)->flags)
183 188
184 #define PageWriteback(page) test_bit(PG_writeback, &(page)->flags) 189 #define PageWriteback(page) test_bit(PG_writeback, &(page)->flags)
185 #define SetPageWriteback(page) \ 190 #define SetPageWriteback(page) \
186 do { \ 191 do { \
187 if (!test_and_set_bit(PG_writeback, \ 192 if (!test_and_set_bit(PG_writeback, \
188 &(page)->flags)) \ 193 &(page)->flags)) \
189 inc_zone_page_state(page, NR_WRITEBACK); \ 194 inc_zone_page_state(page, NR_WRITEBACK); \
190 } while (0) 195 } while (0)
191 #define TestSetPageWriteback(page) \ 196 #define TestSetPageWriteback(page) \
192 ({ \ 197 ({ \
193 int ret; \ 198 int ret; \
194 ret = test_and_set_bit(PG_writeback, \ 199 ret = test_and_set_bit(PG_writeback, \
195 &(page)->flags); \ 200 &(page)->flags); \
196 if (!ret) \ 201 if (!ret) \
197 inc_zone_page_state(page, NR_WRITEBACK); \ 202 inc_zone_page_state(page, NR_WRITEBACK); \
198 ret; \ 203 ret; \
199 }) 204 })
200 #define ClearPageWriteback(page) \ 205 #define ClearPageWriteback(page) \
201 do { \ 206 do { \
202 if (test_and_clear_bit(PG_writeback, \ 207 if (test_and_clear_bit(PG_writeback, \
203 &(page)->flags)) \ 208 &(page)->flags)) \
204 dec_zone_page_state(page, NR_WRITEBACK); \ 209 dec_zone_page_state(page, NR_WRITEBACK); \
205 } while (0) 210 } while (0)
206 #define TestClearPageWriteback(page) \ 211 #define TestClearPageWriteback(page) \
207 ({ \ 212 ({ \
208 int ret; \ 213 int ret; \
209 ret = test_and_clear_bit(PG_writeback, \ 214 ret = test_and_clear_bit(PG_writeback, \
210 &(page)->flags); \ 215 &(page)->flags); \
211 if (ret) \ 216 if (ret) \
212 dec_zone_page_state(page, NR_WRITEBACK); \ 217 dec_zone_page_state(page, NR_WRITEBACK); \
213 ret; \ 218 ret; \
214 }) 219 })
215 220
216 #define PageBuddy(page) test_bit(PG_buddy, &(page)->flags) 221 #define PageBuddy(page) test_bit(PG_buddy, &(page)->flags)
217 #define __SetPageBuddy(page) __set_bit(PG_buddy, &(page)->flags) 222 #define __SetPageBuddy(page) __set_bit(PG_buddy, &(page)->flags)
218 #define __ClearPageBuddy(page) __clear_bit(PG_buddy, &(page)->flags) 223 #define __ClearPageBuddy(page) __clear_bit(PG_buddy, &(page)->flags)
219 224
220 #define PageMappedToDisk(page) test_bit(PG_mappedtodisk, &(page)->flags) 225 #define PageMappedToDisk(page) test_bit(PG_mappedtodisk, &(page)->flags)
221 #define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags) 226 #define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags)
222 #define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags) 227 #define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags)
223 228
224 #define PageReclaim(page) test_bit(PG_reclaim, &(page)->flags) 229 #define PageReclaim(page) test_bit(PG_reclaim, &(page)->flags)
225 #define SetPageReclaim(page) set_bit(PG_reclaim, &(page)->flags) 230 #define SetPageReclaim(page) set_bit(PG_reclaim, &(page)->flags)
226 #define ClearPageReclaim(page) clear_bit(PG_reclaim, &(page)->flags) 231 #define ClearPageReclaim(page) clear_bit(PG_reclaim, &(page)->flags)
227 #define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags) 232 #define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags)
228 233
229 #define PageCompound(page) test_bit(PG_compound, &(page)->flags) 234 #define PageCompound(page) test_bit(PG_compound, &(page)->flags)
230 #define __SetPageCompound(page) __set_bit(PG_compound, &(page)->flags) 235 #define __SetPageCompound(page) __set_bit(PG_compound, &(page)->flags)
231 #define __ClearPageCompound(page) __clear_bit(PG_compound, &(page)->flags) 236 #define __ClearPageCompound(page) __clear_bit(PG_compound, &(page)->flags)
232 237
233 /* 238 /*
234 * PG_reclaim is used in combination with PG_compound to mark the 239 * PG_reclaim is used in combination with PG_compound to mark the
235 * head and tail of a compound page 240 * head and tail of a compound page
236 * 241 *
237 * PG_compound & PG_reclaim => Tail page 242 * PG_compound & PG_reclaim => Tail page
238 * PG_compound & ~PG_reclaim => Head page 243 * PG_compound & ~PG_reclaim => Head page
239 */ 244 */
240 245
241 #define PG_head_tail_mask ((1L << PG_compound) | (1L << PG_reclaim)) 246 #define PG_head_tail_mask ((1L << PG_compound) | (1L << PG_reclaim))
242 247
243 #define PageTail(page) ((page->flags & PG_head_tail_mask) \ 248 #define PageTail(page) ((page->flags & PG_head_tail_mask) \
244 == PG_head_tail_mask) 249 == PG_head_tail_mask)
245 250
246 static inline void __SetPageTail(struct page *page) 251 static inline void __SetPageTail(struct page *page)
247 { 252 {
248 page->flags |= PG_head_tail_mask; 253 page->flags |= PG_head_tail_mask;
249 } 254 }
250 255
251 static inline void __ClearPageTail(struct page *page) 256 static inline void __ClearPageTail(struct page *page)
252 { 257 {
253 page->flags &= ~PG_head_tail_mask; 258 page->flags &= ~PG_head_tail_mask;
254 } 259 }
255 260
256 #define PageHead(page) ((page->flags & PG_head_tail_mask) \ 261 #define PageHead(page) ((page->flags & PG_head_tail_mask) \
257 == (1L << PG_compound)) 262 == (1L << PG_compound))
258 #define __SetPageHead(page) __SetPageCompound(page) 263 #define __SetPageHead(page) __SetPageCompound(page)
259 #define __ClearPageHead(page) __ClearPageCompound(page) 264 #define __ClearPageHead(page) __ClearPageCompound(page)
260 265
261 #ifdef CONFIG_SWAP 266 #ifdef CONFIG_SWAP
262 #define PageSwapCache(page) test_bit(PG_swapcache, &(page)->flags) 267 #define PageSwapCache(page) test_bit(PG_swapcache, &(page)->flags)
263 #define SetPageSwapCache(page) set_bit(PG_swapcache, &(page)->flags) 268 #define SetPageSwapCache(page) set_bit(PG_swapcache, &(page)->flags)
264 #define ClearPageSwapCache(page) clear_bit(PG_swapcache, &(page)->flags) 269 #define ClearPageSwapCache(page) clear_bit(PG_swapcache, &(page)->flags)
265 #else 270 #else
266 #define PageSwapCache(page) 0 271 #define PageSwapCache(page) 0
267 #endif 272 #endif
268 273
269 #define PageUncached(page) test_bit(PG_uncached, &(page)->flags) 274 #define PageUncached(page) test_bit(PG_uncached, &(page)->flags)
270 #define SetPageUncached(page) set_bit(PG_uncached, &(page)->flags) 275 #define SetPageUncached(page) set_bit(PG_uncached, &(page)->flags)
271 #define ClearPageUncached(page) clear_bit(PG_uncached, &(page)->flags) 276 #define ClearPageUncached(page) clear_bit(PG_uncached, &(page)->flags)
272 277
273 struct page; /* forward declaration */ 278 struct page; /* forward declaration */
274 279
275 extern void cancel_dirty_page(struct page *page, unsigned int account_size); 280 extern void cancel_dirty_page(struct page *page, unsigned int account_size);
276 281
277 int test_clear_page_writeback(struct page *page); 282 int test_clear_page_writeback(struct page *page);
278 int test_set_page_writeback(struct page *page); 283 int test_set_page_writeback(struct page *page);
279 284
280 static inline void set_page_writeback(struct page *page) 285 static inline void set_page_writeback(struct page *page)
281 { 286 {
282 test_set_page_writeback(page); 287 test_set_page_writeback(page);
283 } 288 }
284 289
285 #endif /* PAGE_FLAGS_H */ 290 #endif /* PAGE_FLAGS_H */
286 291