Re: [CFT][PATCH] Re: fat problem in 2.4.2

[Roman Zippel]

Hi,

On Thu, 1 Mar 2001, Alexander Viro wrote:

> +static int generic_vm_expand(struct address_space *mapping, loff_t size)
> +{
> +     struct page *page;
> +     unsigned long index, offset;
> +     int err;
> +
> +     if (!mapping->a_ops->prepare_write || !mapping->a_ops->commit_write)
> +             return -ENOSYS;
> +
> +     offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */
> +     index = size >> PAGE_CACHE_SHIFT;

For affs I did basically the same with a small difference:

        offset = ((size-1) & (PAGE_CACHE_SIZE-1)) + 1;
        index = (size-1) >> PAGE_CACHE_SHIFT;

That works fine here and allocates a page in the cache more likely to be
used.

bye, Roman

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