Re: [HOWTO...] LUFS, readpage and large files

[Andrew Morton]

Eduard Bloch <blade@xxxxxxxxxx> wrote:
>
>     offset = p->index << PAGE_CACHE_SHIFT;
>      count = PAGE_SIZE;
> 
>  The problem is, page->index indeed contains a short datatype for offset -
>  ...but where to get the correct data? (the long long offset).

p->index is a 32-bit type.  So (p->index << PAGE_CACHE_SHIFT) is also
32-bit, and stuff overflows.  Do:

	offset = p->index;
	offset <<= PAGE_CACHE_SHIFT;
-
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