--- /dev/null
+#ifndef __LINUX_GFP_H
+#define __LINUX_GFP_H
+
+#include <linux/mmzone.h>
+#include <linux/stddef.h>
+#include <linux/linkage.h>
+#include <linux/config.h>
+
+struct vm_area_struct;
+
+/*
+ * GFP bitmasks..
+ */
+/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low two bits) */
+#define __GFP_DMA 0x01
+#define __GFP_HIGHMEM 0x02
+
+/*
+ * Action modifiers - doesn't change the zoning
+ *
+ * __GFP_REPEAT: Try hard to allocate the memory, but the allocation attempt
+ * _might_ fail. This depends upon the particular VM implementation.
+ *
+ * __GFP_NOFAIL: The VM implementation _must_ retry infinitely: the caller
+ * cannot handle allocation failures.
+ *
+ * __GFP_NORETRY: The VM implementation must not retry indefinitely.
+ */
+#define __GFP_WAIT 0x10 /* Can wait and reschedule? */
+#define __GFP_HIGH 0x20 /* Should access emergency pools? */
+#define __GFP_IO 0x40 /* Can start physical IO? */
+#define __GFP_FS 0x80 /* Can call down to low-level FS? */
+#define __GFP_COLD 0x100 /* Cache-cold page required */
+#define __GFP_NOWARN 0x200 /* Suppress page allocation failure warning */
+#define __GFP_REPEAT 0x400 /* Retry the allocation. Might fail */
+#define __GFP_NOFAIL 0x800 /* Retry for ever. Cannot fail */
+#define __GFP_NORETRY 0x1000 /* Do not retry. Might fail */
+#define __GFP_NO_GROW 0x2000 /* Slab internal usage */
+#define __GFP_COMP 0x4000 /* Add compound page metadata */
+
+#define __GFP_BITS_SHIFT 16 /* Room for 16 __GFP_FOO bits */
+#define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1)
+
+/* if you forget to add the bitmask here kernel will crash, period */
+#define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \
+ __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \
+ __GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP)
+
+#define GFP_ATOMIC (__GFP_HIGH)
+#define GFP_NOIO (__GFP_WAIT)
+#define GFP_NOFS (__GFP_WAIT | __GFP_IO)
+#define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS)
+#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS)
+#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HIGHMEM)
+
+/* Flag - indicates that the buffer will be suitable for DMA. Ignored on some
+ platforms, used as appropriate on others */
+
+#define GFP_DMA __GFP_DMA
+
+
+/*
+ * There is only one page-allocator function, and two main namespaces to
+ * it. The alloc_page*() variants return 'struct page *' and as such
+ * can allocate highmem pages, the *get*page*() variants return
+ * virtual kernel addresses to the allocated page(s).
+ */
+
+/*
+ * We get the zone list from the current node and the gfp_mask.
+ * This zone list contains a maximum of MAXNODES*MAX_NR_ZONES zones.
+ *
+ * For the normal case of non-DISCONTIGMEM systems the NODE_DATA() gets
+ * optimized to &contig_page_data at compile-time.
+ */
+
+/*
+ * If arch_free_page returns non-zero then the generic free_page code can
+ * immediately bail: the arch-specific function has done all the work.
+ */
+#ifndef HAVE_ARCH_FREE_PAGE
+static inline int arch_free_page(struct page *page, int order)
+{
+ /* Generic free_page must do the work. */
+ return 0;
+}
+#endif
+
+extern struct page *
+FASTCALL(__alloc_pages(unsigned int, unsigned int, struct zonelist *));
+
+static inline struct page *alloc_pages_node(int nid, unsigned int gfp_mask,
+ unsigned int order)
+{
+ if (unlikely(order >= MAX_ORDER))
+ return NULL;
+
+ return __alloc_pages(gfp_mask, order,
+ NODE_DATA(nid)->node_zonelists + (gfp_mask & GFP_ZONEMASK));
+}
+
+#ifdef CONFIG_NUMA
+extern struct page *alloc_pages_current(unsigned gfp_mask, unsigned order);
+
+static inline struct page *
+alloc_pages(unsigned int gfp_mask, unsigned int order)
+{
+ if (unlikely(order >= MAX_ORDER))
+ return NULL;
+
+ return alloc_pages_current(gfp_mask, order);
+}
+extern struct page *alloc_page_vma(unsigned gfp_mask,
+ struct vm_area_struct *vma, unsigned long addr);
+#else
+#define alloc_pages(gfp_mask, order) \
+ alloc_pages_node(numa_node_id(), gfp_mask, order)
+#define alloc_page_vma(gfp_mask, vma, addr) alloc_pages(gfp_mask, 0)
+#endif
+#define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0)
+
+extern unsigned long FASTCALL(__get_free_pages(unsigned int gfp_mask, unsigned int order));
+extern unsigned long FASTCALL(get_zeroed_page(unsigned int gfp_mask));
+
+#define __get_free_page(gfp_mask) \
+ __get_free_pages((gfp_mask),0)
+
+#define __get_dma_pages(gfp_mask, order) \
+ __get_free_pages((gfp_mask) | GFP_DMA,(order))
+
+extern void FASTCALL(__free_pages(struct page *page, unsigned int order));
+extern void FASTCALL(free_pages(unsigned long addr, unsigned int order));
+extern void FASTCALL(free_hot_page(struct page *page));
+extern void FASTCALL(free_cold_page(struct page *page));
+
+#define __free_page(page) __free_pages((page), 0)
+#define free_page(addr) free_pages((addr),0)
+
+void page_alloc_init(void);
+
+#endif /* __LINUX_GFP_H */
+++ /dev/null
-/*
- * Macros for manipulating and testing page->flags
- */
-
-#ifndef PAGE_FLAGS_H
-#define PAGE_FLAGS_H
-
-#include <linux/percpu.h>
-#include <linux/cache.h>
-#include <asm/pgtable.h>
-
-/*
- * Various page->flags bits:
- *
- * PG_reserved is set for special pages, which can never be swapped out. Some
- * of them might not even exist (eg empty_bad_page)...
- *
- * The PG_private bitflag is set if page->private contains a valid value.
- *
- * During disk I/O, PG_locked is used. This bit is set before I/O and
- * reset when I/O completes. page_waitqueue(page) is a wait queue of all tasks
- * waiting for the I/O on this page to complete.
- *
- * PG_uptodate tells whether the page's contents is valid. When a read
- * completes, the page becomes uptodate, unless a disk I/O error happened.
- *
- * For choosing which pages to swap out, inode pages carry a PG_referenced bit,
- * which is set any time the system accesses that page through the (mapping,
- * index) hash table. This referenced bit, together with the referenced bit
- * in the page tables, is used to manipulate page->age and move the page across
- * the active, inactive_dirty and inactive_clean lists.
- *
- * Note that the referenced bit, the page->lru list_head and the active,
- * inactive_dirty and inactive_clean lists are protected by the
- * zone->lru_lock, and *NOT* by the usual PG_locked bit!
- *
- * PG_error is set to indicate that an I/O error occurred on this page.
- *
- * PG_arch_1 is an architecture specific page state bit. The generic code
- * guarantees that this bit is cleared for a page when it first is entered into
- * the page cache.
- *
- * PG_highmem pages are not permanently mapped into the kernel virtual address
- * space, they need to be kmapped separately for doing IO on the pages. The
- * struct page (these bits with information) are always mapped into kernel
- * address space...
- */
-
-/*
- * Don't use the *_dontuse flags. Use the macros. Otherwise you'll break
- * locked- and dirty-page accounting. The top eight bits of page->flags are
- * used for page->zone, so putting flag bits there doesn't work.
- */
-#define PG_locked 0 /* Page is locked. Don't touch. */
-#define PG_error 1
-#define PG_referenced 2
-#define PG_uptodate 3
-
-#define PG_dirty 4
-#define PG_lru 5
-#define PG_active 6
-#define PG_slab 7 /* slab debug (Suparna wants this) */
-
-#define PG_highmem 8
-#define PG_checked 9 /* kill me in 2.5.<early>. */
-#define PG_arch_1 10
-#define PG_reserved 11
-
-#define PG_private 12 /* Has something at ->private */
-#define PG_writeback 13 /* Page is under writeback */
-#define PG_nosave 14 /* Used for system suspend/resume */
-#define PG_compound 15 /* Part of a compound page */
-
-#define PG_swapcache 16 /* Swap page: swp_entry_t in private */
-#define PG_mappedtodisk 17 /* Has blocks allocated on-disk */
-#define PG_reclaim 18 /* To be reclaimed asap */
-
-#define PG_foreign 21 /* Page belongs to foreign allocator */
-
-
-/*
- * Global page accounting. One instance per CPU. Only unsigned longs are
- * allowed.
- */
-struct page_state {
- unsigned long nr_dirty; /* Dirty writeable pages */
- unsigned long nr_writeback; /* Pages under writeback */
- unsigned long nr_unstable; /* NFS unstable pages */
- unsigned long nr_page_table_pages;/* Pages used for pagetables */
- unsigned long nr_mapped; /* mapped into pagetables */
- unsigned long nr_slab; /* In slab */
-#define GET_PAGE_STATE_LAST nr_slab
-
- /*
- * The below are zeroed by get_page_state(). Use get_full_page_state()
- * to add up all these.
- */
- unsigned long pgpgin; /* Disk reads */
- unsigned long pgpgout; /* Disk writes */
- unsigned long pswpin; /* swap reads */
- unsigned long pswpout; /* swap writes */
- unsigned long pgalloc_high; /* page allocations */
-
- unsigned long pgalloc_normal;
- unsigned long pgalloc_dma;
- unsigned long pgfree; /* page freeings */
- unsigned long pgactivate; /* pages moved inactive->active */
- unsigned long pgdeactivate; /* pages moved active->inactive */
-
- unsigned long pgfault; /* faults (major+minor) */
- unsigned long pgmajfault; /* faults (major only) */
- unsigned long pgrefill_high; /* inspected in refill_inactive_zone */
- unsigned long pgrefill_normal;
- unsigned long pgrefill_dma;
-
- unsigned long pgsteal_high; /* total highmem pages reclaimed */
- unsigned long pgsteal_normal;
- unsigned long pgsteal_dma;
- unsigned long pgscan_kswapd_high;/* total highmem pages scanned */
- unsigned long pgscan_kswapd_normal;
-
- unsigned long pgscan_kswapd_dma;
- unsigned long pgscan_direct_high;/* total highmem pages scanned */
- unsigned long pgscan_direct_normal;
- unsigned long pgscan_direct_dma;
- unsigned long pginodesteal; /* pages reclaimed via inode freeing */
-
- unsigned long slabs_scanned; /* slab objects scanned */
- unsigned long kswapd_steal; /* pages reclaimed by kswapd */
- unsigned long kswapd_inodesteal;/* reclaimed via kswapd inode freeing */
- unsigned long pageoutrun; /* kswapd's calls to page reclaim */
- unsigned long allocstall; /* direct reclaim calls */
-
- unsigned long pgrotated; /* pages rotated to tail of the LRU */
-};
-
-DECLARE_PER_CPU(struct page_state, page_states);
-
-extern void get_page_state(struct page_state *ret);
-extern void get_full_page_state(struct page_state *ret);
-extern unsigned long __read_page_state(unsigned offset);
-
-#define read_page_state(member) \
- __read_page_state(offsetof(struct page_state, member))
-
-#define mod_page_state(member, delta) \
- do { \
- unsigned long flags; \
- local_irq_save(flags); \
- __get_cpu_var(page_states).member += (delta); \
- local_irq_restore(flags); \
- } while (0)
-
-
-#define inc_page_state(member) mod_page_state(member, 1UL)
-#define dec_page_state(member) mod_page_state(member, 0UL - 1)
-#define add_page_state(member,delta) mod_page_state(member, (delta))
-#define sub_page_state(member,delta) mod_page_state(member, 0UL - (delta))
-
-#define mod_page_state_zone(zone, member, delta) \
- do { \
- unsigned long flags; \
- local_irq_save(flags); \
- if (is_highmem(zone)) \
- __get_cpu_var(page_states).member##_high += (delta);\
- else if (is_normal(zone)) \
- __get_cpu_var(page_states).member##_normal += (delta);\
- else \
- __get_cpu_var(page_states).member##_dma += (delta);\
- local_irq_restore(flags); \
- } while (0)
-
-/*
- * Manipulation of page state flags
- */
-#define PageLocked(page) \
- test_bit(PG_locked, &(page)->flags)
-#define SetPageLocked(page) \
- set_bit(PG_locked, &(page)->flags)
-#define TestSetPageLocked(page) \
- test_and_set_bit(PG_locked, &(page)->flags)
-#define ClearPageLocked(page) \
- clear_bit(PG_locked, &(page)->flags)
-#define TestClearPageLocked(page) \
- test_and_clear_bit(PG_locked, &(page)->flags)
-
-#define PageError(page) test_bit(PG_error, &(page)->flags)
-#define SetPageError(page) set_bit(PG_error, &(page)->flags)
-#define ClearPageError(page) clear_bit(PG_error, &(page)->flags)
-
-#define PageReferenced(page) test_bit(PG_referenced, &(page)->flags)
-#define SetPageReferenced(page) set_bit(PG_referenced, &(page)->flags)
-#define ClearPageReferenced(page) clear_bit(PG_referenced, &(page)->flags)
-#define TestClearPageReferenced(page) test_and_clear_bit(PG_referenced, &(page)->flags)
-
-#define PageUptodate(page) test_bit(PG_uptodate, &(page)->flags)
-#ifndef SetPageUptodate
-#define SetPageUptodate(page) set_bit(PG_uptodate, &(page)->flags)
-#endif
-#define ClearPageUptodate(page) clear_bit(PG_uptodate, &(page)->flags)
-
-#define PageDirty(page) test_bit(PG_dirty, &(page)->flags)
-#define SetPageDirty(page) set_bit(PG_dirty, &(page)->flags)
-#define TestSetPageDirty(page) test_and_set_bit(PG_dirty, &(page)->flags)
-#define ClearPageDirty(page) clear_bit(PG_dirty, &(page)->flags)
-#define TestClearPageDirty(page) test_and_clear_bit(PG_dirty, &(page)->flags)
-
-#define SetPageLRU(page) set_bit(PG_lru, &(page)->flags)
-#define PageLRU(page) test_bit(PG_lru, &(page)->flags)
-#define TestSetPageLRU(page) test_and_set_bit(PG_lru, &(page)->flags)
-#define TestClearPageLRU(page) test_and_clear_bit(PG_lru, &(page)->flags)
-
-#define PageActive(page) test_bit(PG_active, &(page)->flags)
-#define SetPageActive(page) set_bit(PG_active, &(page)->flags)
-#define ClearPageActive(page) clear_bit(PG_active, &(page)->flags)
-#define TestClearPageActive(page) test_and_clear_bit(PG_active, &(page)->flags)
-#define TestSetPageActive(page) test_and_set_bit(PG_active, &(page)->flags)
-
-#define PageSlab(page) test_bit(PG_slab, &(page)->flags)
-#define SetPageSlab(page) set_bit(PG_slab, &(page)->flags)
-#define ClearPageSlab(page) clear_bit(PG_slab, &(page)->flags)
-#define TestClearPageSlab(page) test_and_clear_bit(PG_slab, &(page)->flags)
-#define TestSetPageSlab(page) test_and_set_bit(PG_slab, &(page)->flags)
-
-#ifdef CONFIG_HIGHMEM
-#define PageHighMem(page) test_bit(PG_highmem, &(page)->flags)
-#else
-#define PageHighMem(page) 0 /* needed to optimize away at compile time */
-#endif
-
-#define PageChecked(page) test_bit(PG_checked, &(page)->flags)
-#define SetPageChecked(page) set_bit(PG_checked, &(page)->flags)
-#define ClearPageChecked(page) clear_bit(PG_checked, &(page)->flags)
-
-#define PageReserved(page) test_bit(PG_reserved, &(page)->flags)
-#define SetPageReserved(page) set_bit(PG_reserved, &(page)->flags)
-#define ClearPageReserved(page) clear_bit(PG_reserved, &(page)->flags)
-#define __ClearPageReserved(page) __clear_bit(PG_reserved, &(page)->flags)
-
-#define SetPagePrivate(page) set_bit(PG_private, &(page)->flags)
-#define ClearPagePrivate(page) clear_bit(PG_private, &(page)->flags)
-#define PagePrivate(page) test_bit(PG_private, &(page)->flags)
-
-#define PageWriteback(page) test_bit(PG_writeback, &(page)->flags)
-#define SetPageWriteback(page) \
- do { \
- if (!test_and_set_bit(PG_writeback, \
- &(page)->flags)) \
- inc_page_state(nr_writeback); \
- } while (0)
-#define TestSetPageWriteback(page) \
- ({ \
- int ret; \
- ret = test_and_set_bit(PG_writeback, \
- &(page)->flags); \
- if (!ret) \
- inc_page_state(nr_writeback); \
- ret; \
- })
-#define ClearPageWriteback(page) \
- do { \
- if (test_and_clear_bit(PG_writeback, \
- &(page)->flags)) \
- dec_page_state(nr_writeback); \
- } while (0)
-#define TestClearPageWriteback(page) \
- ({ \
- int ret; \
- ret = test_and_clear_bit(PG_writeback, \
- &(page)->flags); \
- if (ret) \
- dec_page_state(nr_writeback); \
- ret; \
- })
-
-#define PageNosave(page) test_bit(PG_nosave, &(page)->flags)
-#define SetPageNosave(page) set_bit(PG_nosave, &(page)->flags)
-#define TestSetPageNosave(page) test_and_set_bit(PG_nosave, &(page)->flags)
-#define ClearPageNosave(page) clear_bit(PG_nosave, &(page)->flags)
-#define TestClearPageNosave(page) test_and_clear_bit(PG_nosave, &(page)->flags)
-
-#define PageMappedToDisk(page) test_bit(PG_mappedtodisk, &(page)->flags)
-#define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags)
-#define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags)
-
-#define PageReclaim(page) test_bit(PG_reclaim, &(page)->flags)
-#define SetPageReclaim(page) set_bit(PG_reclaim, &(page)->flags)
-#define ClearPageReclaim(page) clear_bit(PG_reclaim, &(page)->flags)
-#define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags)
-
-#define PageCompound(page) test_bit(PG_compound, &(page)->flags)
-#define SetPageCompound(page) set_bit(PG_compound, &(page)->flags)
-#define ClearPageCompound(page) clear_bit(PG_compound, &(page)->flags)
-
-/* A foreign page uses a custom destructor rather than the buddy allocator. */
-#ifdef CONFIG_FOREIGN_PAGES
-#define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
-#define SetPageForeign(page, dtor) do { \
- set_bit(PG_foreign, &(page)->flags); \
- (page)->mapping = (void *)dtor; \
-} while (0)
-#define ClearPageForeign(page) do { \
- clear_bit(PG_foreign, &(page)->flags); \
- (page)->mapping = NULL; \
-} while (0)
-#define PageForeignDestructor(page) \
- ( (void (*) (struct page *)) (page)->mapping )
-#else
-#define PageForeign(page) 0
-#define PageForeignDestructor(page) void
-#endif
-
-#ifdef CONFIG_SWAP
-#define PageSwapCache(page) test_bit(PG_swapcache, &(page)->flags)
-#define SetPageSwapCache(page) set_bit(PG_swapcache, &(page)->flags)
-#define ClearPageSwapCache(page) clear_bit(PG_swapcache, &(page)->flags)
-#else
-#define PageSwapCache(page) 0
-#endif
-
-struct page; /* forward declaration */
-
-int test_clear_page_dirty(struct page *page);
-int __clear_page_dirty(struct page *page);
-int test_clear_page_writeback(struct page *page);
-int test_set_page_writeback(struct page *page);
-
-static inline void clear_page_dirty(struct page *page)
-{
- test_clear_page_dirty(page);
-}
-
-static inline void set_page_writeback(struct page *page)
-{
- test_set_page_writeback(page);
-}
-
-#endif /* PAGE_FLAGS_H */
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