Commit 6c45b454 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Linus Torvalds

mm/filemap: don't cast ->readpage to filler_t for do_read_cache_page

We can just pass a NULL filler and do the right thing inside of
do_read_cache_page based on the NULL parameter.

Link: http://lkml.kernel.org/r/20190520055731.24538-3-hch@lst.deSigned-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d322a8e5
......@@ -383,8 +383,7 @@ extern int read_cache_pages(struct address_space *mapping,
static inline struct page *read_mapping_page(struct address_space *mapping,
pgoff_t index, void *data)
{
filler_t *filler = (filler_t *)mapping->a_ops->readpage;
return read_cache_page(mapping, index, filler, data);
return read_cache_page(mapping, index, NULL, data);
}
/*
......
......@@ -2825,7 +2825,11 @@ static struct page *do_read_cache_page(struct address_space *mapping,
}
filler:
err = filler(data, page);
if (filler)
err = filler(data, page);
else
err = mapping->a_ops->readpage(data, page);
if (err < 0) {
put_page(page);
return ERR_PTR(err);
......@@ -2937,9 +2941,7 @@ struct page *read_cache_page_gfp(struct address_space *mapping,
pgoff_t index,
gfp_t gfp)
{
filler_t *filler = (filler_t *)mapping->a_ops->readpage;
return do_read_cache_page(mapping, index, filler, NULL, gfp);
return do_read_cache_page(mapping, index, NULL, NULL, gfp);
}
EXPORT_SYMBOL(read_cache_page_gfp);
......
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