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truncate: new helpers

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Introduce new truncate helpers truncate_pagecache and inode_newsize_ok.
vmtruncate is also consolidated from mm/memory.c and mm/nommu.c and
into mm/truncate.c.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
npiggin@suse.de
2009-08-21 02:35:05 +10:00
committed by al
parent eca6f534e6
commit 25d9e2d152
9 changed files with 120 additions and 108 deletions
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include/linux/fs.h
+2 -1
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@@ -2382,7 +2382,8 @@ extern int buffer_migrate_page(struct address_space *,
#define buffer_migrate_page NULL
#endif
extern int inode_change_ok(struct inode *, struct iattr *);
extern int inode_change_ok(const struct inode *, struct iattr *);
extern int inode_newsize_ok(const struct inode *, loff_t offset);
extern int __must_check inode_setattr(struct inode *, struct iattr *);
extern void file_update_time(struct file *file);