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TOMOYO Linux Cross Reference
Linux/mm/internal.h

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  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 /* internal.h: mm/ internal definitions
  3  *
  4  * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
  5  * Written by David Howells (dhowells@redhat.com)
  6  */
  7 #ifndef __MM_INTERNAL_H
  8 #define __MM_INTERNAL_H
  9 
 10 #include <linux/fs.h>
 11 #include <linux/mm.h>
 12 #include <linux/pagemap.h>
 13 #include <linux/tracepoint-defs.h>
 14 
 15 /*
 16  * The set of flags that only affect watermark checking and reclaim
 17  * behaviour. This is used by the MM to obey the caller constraints
 18  * about IO, FS and watermark checking while ignoring placement
 19  * hints such as HIGHMEM usage.
 20  */
 21 #define GFP_RECLAIM_MASK (__GFP_RECLAIM|__GFP_HIGH|__GFP_IO|__GFP_FS|\
 22                         __GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NOFAIL|\
 23                         __GFP_NORETRY|__GFP_MEMALLOC|__GFP_NOMEMALLOC|\
 24                         __GFP_ATOMIC)
 25 
 26 /* The GFP flags allowed during early boot */
 27 #define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS))
 28 
 29 /* Control allocation cpuset and node placement constraints */
 30 #define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
 31 
 32 /* Do not use these with a slab allocator */
 33 #define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
 34 
 35 void page_writeback_init(void);
 36 
 37 vm_fault_t do_swap_page(struct vm_fault *vmf);
 38 
 39 void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
 40                 unsigned long floor, unsigned long ceiling);
 41 
 42 static inline bool can_madv_lru_vma(struct vm_area_struct *vma)
 43 {
 44         return !(vma->vm_flags & (VM_LOCKED|VM_HUGETLB|VM_PFNMAP));
 45 }
 46 
 47 void unmap_page_range(struct mmu_gather *tlb,
 48                              struct vm_area_struct *vma,
 49                              unsigned long addr, unsigned long end,
 50                              struct zap_details *details);
 51 
 52 void force_page_cache_readahead(struct address_space *, struct file *,
 53                 pgoff_t index, unsigned long nr_to_read);
 54 void __do_page_cache_readahead(struct address_space *, struct file *,
 55                 pgoff_t index, unsigned long nr_to_read,
 56                 unsigned long lookahead_size);
 57 
 58 /*
 59  * Submit IO for the read-ahead request in file_ra_state.
 60  */
 61 static inline void ra_submit(struct file_ra_state *ra,
 62                 struct address_space *mapping, struct file *filp)
 63 {
 64         __do_page_cache_readahead(mapping, filp,
 65                         ra->start, ra->size, ra->async_size);
 66 }
 67 
 68 /**
 69  * page_evictable - test whether a page is evictable
 70  * @page: the page to test
 71  *
 72  * Test whether page is evictable--i.e., should be placed on active/inactive
 73  * lists vs unevictable list.
 74  *
 75  * Reasons page might not be evictable:
 76  * (1) page's mapping marked unevictable
 77  * (2) page is part of an mlocked VMA
 78  *
 79  */
 80 static inline bool page_evictable(struct page *page)
 81 {
 82         bool ret;
 83 
 84         /* Prevent address_space of inode and swap cache from being freed */
 85         rcu_read_lock();
 86         ret = !mapping_unevictable(page_mapping(page)) && !PageMlocked(page);
 87         rcu_read_unlock();
 88         return ret;
 89 }
 90 
 91 /*
 92  * Turn a non-refcounted page (->_refcount == 0) into refcounted with
 93  * a count of one.
 94  */
 95 static inline void set_page_refcounted(struct page *page)
 96 {
 97         VM_BUG_ON_PAGE(PageTail(page), page);
 98         VM_BUG_ON_PAGE(page_ref_count(page), page);
 99         set_page_count(page, 1);
100 }
101 
102 extern unsigned long highest_memmap_pfn;
103 
104 /*
105  * Maximum number of reclaim retries without progress before the OOM
106  * killer is consider the only way forward.
107  */
108 #define MAX_RECLAIM_RETRIES 16
109 
110 /*
111  * in mm/vmscan.c:
112  */
113 extern int isolate_lru_page(struct page *page);
114 extern void putback_lru_page(struct page *page);
115 
116 /*
117  * in mm/rmap.c:
118  */
119 extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
120 
121 /*
122  * in mm/page_alloc.c
123  */
124 
125 /*
126  * Structure for holding the mostly immutable allocation parameters passed
127  * between functions involved in allocations, including the alloc_pages*
128  * family of functions.
129  *
130  * nodemask, migratetype and highest_zoneidx are initialized only once in
131  * __alloc_pages_nodemask() and then never change.
132  *
133  * zonelist, preferred_zone and highest_zoneidx are set first in
134  * __alloc_pages_nodemask() for the fast path, and might be later changed
135  * in __alloc_pages_slowpath(). All other functions pass the whole structure
136  * by a const pointer.
137  */
138 struct alloc_context {
139         struct zonelist *zonelist;
140         nodemask_t *nodemask;
141         struct zoneref *preferred_zoneref;
142         int migratetype;
143 
144         /*
145          * highest_zoneidx represents highest usable zone index of
146          * the allocation request. Due to the nature of the zone,
147          * memory on lower zone than the highest_zoneidx will be
148          * protected by lowmem_reserve[highest_zoneidx].
149          *
150          * highest_zoneidx is also used by reclaim/compaction to limit
151          * the target zone since higher zone than this index cannot be
152          * usable for this allocation request.
153          */
154         enum zone_type highest_zoneidx;
155         bool spread_dirty_pages;
156 };
157 
158 /*
159  * Locate the struct page for both the matching buddy in our
160  * pair (buddy1) and the combined O(n+1) page they form (page).
161  *
162  * 1) Any buddy B1 will have an order O twin B2 which satisfies
163  * the following equation:
164  *     B2 = B1 ^ (1 << O)
165  * For example, if the starting buddy (buddy2) is #8 its order
166  * 1 buddy is #10:
167  *     B2 = 8 ^ (1 << 1) = 8 ^ 2 = 10
168  *
169  * 2) Any buddy B will have an order O+1 parent P which
170  * satisfies the following equation:
171  *     P = B & ~(1 << O)
172  *
173  * Assumption: *_mem_map is contiguous at least up to MAX_ORDER
174  */
175 static inline unsigned long
176 __find_buddy_pfn(unsigned long page_pfn, unsigned int order)
177 {
178         return page_pfn ^ (1 << order);
179 }
180 
181 extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
182                                 unsigned long end_pfn, struct zone *zone);
183 
184 static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
185                                 unsigned long end_pfn, struct zone *zone)
186 {
187         if (zone->contiguous)
188                 return pfn_to_page(start_pfn);
189 
190         return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
191 }
192 
193 extern int __isolate_free_page(struct page *page, unsigned int order);
194 extern void __putback_isolated_page(struct page *page, unsigned int order,
195                                     int mt);
196 extern void memblock_free_pages(struct page *page, unsigned long pfn,
197                                         unsigned int order);
198 extern void __free_pages_core(struct page *page, unsigned int order);
199 extern void prep_compound_page(struct page *page, unsigned int order);
200 extern void post_alloc_hook(struct page *page, unsigned int order,
201                                         gfp_t gfp_flags);
202 extern int user_min_free_kbytes;
203 
204 extern void zone_pcp_update(struct zone *zone);
205 extern void zone_pcp_reset(struct zone *zone);
206 
207 #if defined CONFIG_COMPACTION || defined CONFIG_CMA
208 
209 /*
210  * in mm/compaction.c
211  */
212 /*
213  * compact_control is used to track pages being migrated and the free pages
214  * they are being migrated to during memory compaction. The free_pfn starts
215  * at the end of a zone and migrate_pfn begins at the start. Movable pages
216  * are moved to the end of a zone during a compaction run and the run
217  * completes when free_pfn <= migrate_pfn
218  */
219 struct compact_control {
220         struct list_head freepages;     /* List of free pages to migrate to */
221         struct list_head migratepages;  /* List of pages being migrated */
222         unsigned int nr_freepages;      /* Number of isolated free pages */
223         unsigned int nr_migratepages;   /* Number of pages to migrate */
224         unsigned long free_pfn;         /* isolate_freepages search base */
225         unsigned long migrate_pfn;      /* isolate_migratepages search base */
226         unsigned long fast_start_pfn;   /* a pfn to start linear scan from */
227         struct zone *zone;
228         unsigned long total_migrate_scanned;
229         unsigned long total_free_scanned;
230         unsigned short fast_search_fail;/* failures to use free list searches */
231         short search_order;             /* order to start a fast search at */
232         const gfp_t gfp_mask;           /* gfp mask of a direct compactor */
233         int order;                      /* order a direct compactor needs */
234         int migratetype;                /* migratetype of direct compactor */
235         const unsigned int alloc_flags; /* alloc flags of a direct compactor */
236         const int highest_zoneidx;      /* zone index of a direct compactor */
237         enum migrate_mode mode;         /* Async or sync migration mode */
238         bool ignore_skip_hint;          /* Scan blocks even if marked skip */
239         bool no_set_skip_hint;          /* Don't mark blocks for skipping */
240         bool ignore_block_suitable;     /* Scan blocks considered unsuitable */
241         bool direct_compaction;         /* False from kcompactd or /proc/... */
242         bool proactive_compaction;      /* kcompactd proactive compaction */
243         bool whole_zone;                /* Whole zone should/has been scanned */
244         bool contended;                 /* Signal lock or sched contention */
245         bool rescan;                    /* Rescanning the same pageblock */
246         bool alloc_contig;              /* alloc_contig_range allocation */
247 };
248 
249 /*
250  * Used in direct compaction when a page should be taken from the freelists
251  * immediately when one is created during the free path.
252  */
253 struct capture_control {
254         struct compact_control *cc;
255         struct page *page;
256 };
257 
258 unsigned long
259 isolate_freepages_range(struct compact_control *cc,
260                         unsigned long start_pfn, unsigned long end_pfn);
261 unsigned long
262 isolate_migratepages_range(struct compact_control *cc,
263                            unsigned long low_pfn, unsigned long end_pfn);
264 int find_suitable_fallback(struct free_area *area, unsigned int order,
265                         int migratetype, bool only_stealable, bool *can_steal);
266 
267 #endif
268 
269 /*
270  * This function returns the order of a free page in the buddy system. In
271  * general, page_zone(page)->lock must be held by the caller to prevent the
272  * page from being allocated in parallel and returning garbage as the order.
273  * If a caller does not hold page_zone(page)->lock, it must guarantee that the
274  * page cannot be allocated or merged in parallel. Alternatively, it must
275  * handle invalid values gracefully, and use page_order_unsafe() below.
276  */
277 static inline unsigned int page_order(struct page *page)
278 {
279         /* PageBuddy() must be checked by the caller */
280         return page_private(page);
281 }
282 
283 /*
284  * Like page_order(), but for callers who cannot afford to hold the zone lock.
285  * PageBuddy() should be checked first by the caller to minimize race window,
286  * and invalid values must be handled gracefully.
287  *
288  * READ_ONCE is used so that if the caller assigns the result into a local
289  * variable and e.g. tests it for valid range before using, the compiler cannot
290  * decide to remove the variable and inline the page_private(page) multiple
291  * times, potentially observing different values in the tests and the actual
292  * use of the result.
293  */
294 #define page_order_unsafe(page)         READ_ONCE(page_private(page))
295 
296 static inline bool is_cow_mapping(vm_flags_t flags)
297 {
298         return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
299 }
300 
301 /*
302  * These three helpers classifies VMAs for virtual memory accounting.
303  */
304 
305 /*
306  * Executable code area - executable, not writable, not stack
307  */
308 static inline bool is_exec_mapping(vm_flags_t flags)
309 {
310         return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
311 }
312 
313 /*
314  * Stack area - atomatically grows in one direction
315  *
316  * VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous:
317  * do_mmap() forbids all other combinations.
318  */
319 static inline bool is_stack_mapping(vm_flags_t flags)
320 {
321         return (flags & VM_STACK) == VM_STACK;
322 }
323 
324 /*
325  * Data area - private, writable, not stack
326  */
327 static inline bool is_data_mapping(vm_flags_t flags)
328 {
329         return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
330 }
331 
332 /* mm/util.c */
333 void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
334                 struct vm_area_struct *prev);
335 void __vma_unlink_list(struct mm_struct *mm, struct vm_area_struct *vma);
336 
337 #ifdef CONFIG_MMU
338 extern long populate_vma_page_range(struct vm_area_struct *vma,
339                 unsigned long start, unsigned long end, int *nonblocking);
340 extern void munlock_vma_pages_range(struct vm_area_struct *vma,
341                         unsigned long start, unsigned long end);
342 static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
343 {
344         munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
345 }
346 
347 /*
348  * must be called with vma's mmap_lock held for read or write, and page locked.
349  */
350 extern void mlock_vma_page(struct page *page);
351 extern unsigned int munlock_vma_page(struct page *page);
352 
353 /*
354  * Clear the page's PageMlocked().  This can be useful in a situation where
355  * we want to unconditionally remove a page from the pagecache -- e.g.,
356  * on truncation or freeing.
357  *
358  * It is legal to call this function for any page, mlocked or not.
359  * If called for a page that is still mapped by mlocked vmas, all we do
360  * is revert to lazy LRU behaviour -- semantics are not broken.
361  */
362 extern void clear_page_mlock(struct page *page);
363 
364 /*
365  * mlock_migrate_page - called only from migrate_misplaced_transhuge_page()
366  * (because that does not go through the full procedure of migration ptes):
367  * to migrate the Mlocked page flag; update statistics.
368  */
369 static inline void mlock_migrate_page(struct page *newpage, struct page *page)
370 {
371         if (TestClearPageMlocked(page)) {
372                 int nr_pages = thp_nr_pages(page);
373 
374                 /* Holding pmd lock, no change in irq context: __mod is safe */
375                 __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
376                 SetPageMlocked(newpage);
377                 __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
378         }
379 }
380 
381 extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
382 
383 /*
384  * At what user virtual address is page expected in @vma?
385  */
386 static inline unsigned long
387 __vma_address(struct page *page, struct vm_area_struct *vma)
388 {
389         pgoff_t pgoff = page_to_pgoff(page);
390         return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
391 }
392 
393 static inline unsigned long
394 vma_address(struct page *page, struct vm_area_struct *vma)
395 {
396         unsigned long start, end;
397 
398         start = __vma_address(page, vma);
399         end = start + thp_size(page) - PAGE_SIZE;
400 
401         /* page should be within @vma mapping range */
402         VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma);
403 
404         return max(start, vma->vm_start);
405 }
406 
407 static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf,
408                                                     struct file *fpin)
409 {
410         int flags = vmf->flags;
411 
412         if (fpin)
413                 return fpin;
414 
415         /*
416          * FAULT_FLAG_RETRY_NOWAIT means we don't want to wait on page locks or
417          * anything, so we only pin the file and drop the mmap_lock if only
418          * FAULT_FLAG_ALLOW_RETRY is set, while this is the first attempt.
419          */
420         if (fault_flag_allow_retry_first(flags) &&
421             !(flags & FAULT_FLAG_RETRY_NOWAIT)) {
422                 fpin = get_file(vmf->vma->vm_file);
423                 mmap_read_unlock(vmf->vma->vm_mm);
424         }
425         return fpin;
426 }
427 
428 #else /* !CONFIG_MMU */
429 static inline void clear_page_mlock(struct page *page) { }
430 static inline void mlock_vma_page(struct page *page) { }
431 static inline void mlock_migrate_page(struct page *new, struct page *old) { }
432 
433 #endif /* !CONFIG_MMU */
434 
435 /*
436  * Return the mem_map entry representing the 'offset' subpage within
437  * the maximally aligned gigantic page 'base'.  Handle any discontiguity
438  * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
439  */
440 static inline struct page *mem_map_offset(struct page *base, int offset)
441 {
442         if (unlikely(offset >= MAX_ORDER_NR_PAGES))
443                 return nth_page(base, offset);
444         return base + offset;
445 }
446 
447 /*
448  * Iterator over all subpages within the maximally aligned gigantic
449  * page 'base'.  Handle any discontiguity in the mem_map.
450  */
451 static inline struct page *mem_map_next(struct page *iter,
452                                                 struct page *base, int offset)
453 {
454         if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
455                 unsigned long pfn = page_to_pfn(base) + offset;
456                 if (!pfn_valid(pfn))
457                         return NULL;
458                 return pfn_to_page(pfn);
459         }
460         return iter + 1;
461 }
462 
463 /* Memory initialisation debug and verification */
464 enum mminit_level {
465         MMINIT_WARNING,
466         MMINIT_VERIFY,
467         MMINIT_TRACE
468 };
469 
470 #ifdef CONFIG_DEBUG_MEMORY_INIT
471 
472 extern int mminit_loglevel;
473 
474 #define mminit_dprintk(level, prefix, fmt, arg...) \
475 do { \
476         if (level < mminit_loglevel) { \
477                 if (level <= MMINIT_WARNING) \
478                         pr_warn("mminit::" prefix " " fmt, ##arg);      \
479                 else \
480                         printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
481         } \
482 } while (0)
483 
484 extern void mminit_verify_pageflags_layout(void);
485 extern void mminit_verify_zonelist(void);
486 #else
487 
488 static inline void mminit_dprintk(enum mminit_level level,
489                                 const char *prefix, const char *fmt, ...)
490 {
491 }
492 
493 static inline void mminit_verify_pageflags_layout(void)
494 {
495 }
496 
497 static inline void mminit_verify_zonelist(void)
498 {
499 }
500 #endif /* CONFIG_DEBUG_MEMORY_INIT */
501 
502 /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
503 #if defined(CONFIG_SPARSEMEM)
504 extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
505                                 unsigned long *end_pfn);
506 #else
507 static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
508                                 unsigned long *end_pfn)
509 {
510 }
511 #endif /* CONFIG_SPARSEMEM */
512 
513 #define NODE_RECLAIM_NOSCAN     -2
514 #define NODE_RECLAIM_FULL       -1
515 #define NODE_RECLAIM_SOME       0
516 #define NODE_RECLAIM_SUCCESS    1
517 
518 #ifdef CONFIG_NUMA
519 extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int);
520 #else
521 static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask,
522                                 unsigned int order)
523 {
524         return NODE_RECLAIM_NOSCAN;
525 }
526 #endif
527 
528 extern int hwpoison_filter(struct page *p);
529 
530 extern u32 hwpoison_filter_dev_major;
531 extern u32 hwpoison_filter_dev_minor;
532 extern u64 hwpoison_filter_flags_mask;
533 extern u64 hwpoison_filter_flags_value;
534 extern u64 hwpoison_filter_memcg;
535 extern u32 hwpoison_filter_enable;
536 
537 extern unsigned long  __must_check vm_mmap_pgoff(struct file *, unsigned long,
538         unsigned long, unsigned long,
539         unsigned long, unsigned long);
540 
541 extern void set_pageblock_order(void);
542 unsigned int reclaim_clean_pages_from_list(struct zone *zone,
543                                             struct list_head *page_list);
544 /* The ALLOC_WMARK bits are used as an index to zone->watermark */
545 #define ALLOC_WMARK_MIN         WMARK_MIN
546 #define ALLOC_WMARK_LOW         WMARK_LOW
547 #define ALLOC_WMARK_HIGH        WMARK_HIGH
548 #define ALLOC_NO_WATERMARKS     0x04 /* don't check watermarks at all */
549 
550 /* Mask to get the watermark bits */
551 #define ALLOC_WMARK_MASK        (ALLOC_NO_WATERMARKS-1)
552 
553 /*
554  * Only MMU archs have async oom victim reclaim - aka oom_reaper so we
555  * cannot assume a reduced access to memory reserves is sufficient for
556  * !MMU
557  */
558 #ifdef CONFIG_MMU
559 #define ALLOC_OOM               0x08
560 #else
561 #define ALLOC_OOM               ALLOC_NO_WATERMARKS
562 #endif
563 
564 #define ALLOC_HARDER             0x10 /* try to alloc harder */
565 #define ALLOC_HIGH               0x20 /* __GFP_HIGH set */
566 #define ALLOC_CPUSET             0x40 /* check for correct cpuset */
567 #define ALLOC_CMA                0x80 /* allow allocations from CMA areas */
568 #ifdef CONFIG_ZONE_DMA32
569 #define ALLOC_NOFRAGMENT        0x100 /* avoid mixing pageblock types */
570 #else
571 #define ALLOC_NOFRAGMENT          0x0
572 #endif
573 #define ALLOC_KSWAPD            0x800 /* allow waking of kswapd, __GFP_KSWAPD_RECLAIM set */
574 
575 enum ttu_flags;
576 struct tlbflush_unmap_batch;
577 
578 
579 /*
580  * only for MM internal work items which do not depend on
581  * any allocations or locks which might depend on allocations
582  */
583 extern struct workqueue_struct *mm_percpu_wq;
584 
585 #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
586 void try_to_unmap_flush(void);
587 void try_to_unmap_flush_dirty(void);
588 void flush_tlb_batched_pending(struct mm_struct *mm);
589 #else
590 static inline void try_to_unmap_flush(void)
591 {
592 }
593 static inline void try_to_unmap_flush_dirty(void)
594 {
595 }
596 static inline void flush_tlb_batched_pending(struct mm_struct *mm)
597 {
598 }
599 #endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */
600 
601 extern const struct trace_print_flags pageflag_names[];
602 extern const struct trace_print_flags vmaflag_names[];
603 extern const struct trace_print_flags gfpflag_names[];
604 
605 static inline bool is_migrate_highatomic(enum migratetype migratetype)
606 {
607         return migratetype == MIGRATE_HIGHATOMIC;
608 }
609 
610 static inline bool is_migrate_highatomic_page(struct page *page)
611 {
612         return get_pageblock_migratetype(page) == MIGRATE_HIGHATOMIC;
613 }
614 
615 void setup_zone_pageset(struct zone *zone);
616 
617 struct migration_target_control {
618         int nid;                /* preferred node id */
619         nodemask_t *nmask;
620         gfp_t gfp_mask;
621 };
622 
623 #endif  /* __MM_INTERNAL_H */
624 

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