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While tracking down the reason for an ioremap() failure I was distracted by the WARN_ONCE() in __ioremap_caller(). Performing a WARN_ONCE() sanity check before the mapping is successful seems pointless if the caller sends bad values. A case in point is when the BIOS provides erroneous screen_info values causing vesafb_probe() to request an outrageuous size. The WARN_ONCE is then wasted on bogosity. Move the warning to a point where the mapping has been successfully allocated. Addresses: http://bugs.launchpad.net/bugs/772042 Reviewed-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Link: http://lkml.kernel.org/r/4DB99D2E.9080106@canonical.com Signed-off-by: Ingo Molnar <mingo@elte.hu>