Re: [PATCH] int (*readpage)(struct file *, struct page *);

From: Trond Myklebust (
Date: Thu May 11 2000 - 11:35:18 EST

>>>>> " " == Jeff V Merkey <> writes:

> If I understand this correctly, then I am assuming that since
> the struct file *file can be NULL, then the struct inode *inode
> address will always be assumed to be available from
> page->mapping->host instead of dentry->d_inode? Knowing that
> callers may pass a NULL strut file * is useful to know.

Stop it! This sort of thing should only be used by private code
(i.e. the disk-specific stuff) where one knows that the file/dentry is
not needed. If people want to document uses of that, then fine.

The generic VM/VFS code should however never pass a NULL value for the
file parameter, or similarly assume that we can 'make do' with
page->mapping->host when calling readpage(), writepage() etc.


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