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SubjectRe: [HOWTO...] LUFS, readpage and large files
Eduard Bloch <blade@debian.org> 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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