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由 Alex Elder 提交于
A pgoff_t is defined (by default) to have type (unsigned long). On architectures such as i686 that's a 32-bit type. The ceph address space code was attempting to produce 64 bit offsets by shifting a page's index by PAGE_CACHE_SHIFT, but the result was not what was desired because the shift occurred before the result got promoted to 64 bits. Fix this by converting all uses of page->index used in this way to use the page_offset() macro, which ensures the 64-bit result has the intended value. This fixes http://tracker.newdream.net/issues/3112Reported-by: NMohamed Pakkeer <pakkeer.mohideen@realimage.com> Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NSage Weil <sage@inktank.com>
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