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nios2: drop access_ok() check from __put_user()
Unlike other architectures, the nios2 version of __put_user() has an extra check for access_ok(), preventing it from being used to implement __put_kernel_nofault(). Split up put_user() along the same lines as __get_user()/get_user() Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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