6f39ce056a
migrate_huge_page_move_mapping() is declared as "extern int ..." in include/linux/migrate.h for !CONFIG_MIGRATION, which causes the build error like below: mm/mprotect.o: In function `migrate_huge_page_move_mapping': mprotect.c:(.text+0x0): multiple definition of `migrate_huge_page_move_mapping' mm/shmem.o:shmem.c:(.text+0x0): first defined here mm/rmap.o: In function `migrate_huge_page_move_mapping': rmap.c:(.text+0x0): multiple definition of `migrate_huge_page_move_mapping' mm/shmem.o:shmem.c:(.text+0x0): first defined here Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
65 lines
2 KiB
C
65 lines
2 KiB
C
#ifndef _LINUX_MIGRATE_H
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#define _LINUX_MIGRATE_H
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#include <linux/mm.h>
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#include <linux/mempolicy.h>
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typedef struct page *new_page_t(struct page *, unsigned long private, int **);
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#ifdef CONFIG_MIGRATION
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#define PAGE_MIGRATION 1
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extern void putback_lru_pages(struct list_head *l);
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extern int migrate_page(struct address_space *,
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struct page *, struct page *);
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extern int migrate_pages(struct list_head *l, new_page_t x,
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unsigned long private, int offlining);
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extern int migrate_huge_pages(struct list_head *l, new_page_t x,
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unsigned long private, int offlining);
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extern int fail_migrate_page(struct address_space *,
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struct page *, struct page *);
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extern int migrate_prep(void);
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extern int migrate_prep_local(void);
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extern int migrate_vmas(struct mm_struct *mm,
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const nodemask_t *from, const nodemask_t *to,
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unsigned long flags);
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extern void migrate_page_copy(struct page *newpage, struct page *page);
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extern int migrate_huge_page_move_mapping(struct address_space *mapping,
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struct page *newpage, struct page *page);
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#else
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#define PAGE_MIGRATION 0
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static inline void putback_lru_pages(struct list_head *l) {}
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static inline int migrate_pages(struct list_head *l, new_page_t x,
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unsigned long private, int offlining) { return -ENOSYS; }
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static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
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unsigned long private, int offlining) { return -ENOSYS; }
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static inline int migrate_prep(void) { return -ENOSYS; }
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static inline int migrate_prep_local(void) { return -ENOSYS; }
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static inline int migrate_vmas(struct mm_struct *mm,
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const nodemask_t *from, const nodemask_t *to,
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unsigned long flags)
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{
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return -ENOSYS;
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}
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static inline void migrate_page_copy(struct page *newpage,
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struct page *page) {}
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static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
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struct page *newpage, struct page *page)
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{
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return -ENOSYS;
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}
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/* Possible settings for the migrate_page() method in address_operations */
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#define migrate_page NULL
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#define fail_migrate_page NULL
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#endif /* CONFIG_MIGRATION */
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#endif /* _LINUX_MIGRATE_H */
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