On Thu, 06 Sep 2012, Jan Stancek wrote:
> do_readahead() requires a_ops->readpage to be != NULL:
> 568 static ssize_t
> 569 do_readahead(struct address_space *mapping, struct file *filp,
> 570 pgoff_t index, unsigned long nr)
> 571 {
> 572 if (!mapping || !mapping->a_ops || !mapping->a_ops->readpage)
> 573 return -EINVAL;
> 574
> 575 force_page_cache_readahead(mapping, filp, index, nr);
> 576 return 0;
> 577 }
>
> but following commit removed readpage from hugetlbfs:
> commit f2deae9d4e70793568ef9e85d227abb7bef5b622
> Author: Mel Gorman <m...@csn.ul.ie>
> Date: Wed May 13 15:56:10 2009 +0100
> Remove implementation of readpage from the hugetlbfs_aops
>
> So this is going to always return EINVAL on patched kernels.
> Ignore return value, regardless of readahead() outcome testcase
> will still check if reservation counter gets corrupted.
>
> Signed-off-by: Jan Stancek <jstan...@redhat.com>Applied, thanks. Eric
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