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Oliver O'Halloran authored
Treat an empty reboot cmd string the same as a NULL string. This squashes a spurious unsupported reboot message that sometimes gets out when using xmon. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200217024833.30580-1-oohall@gmail.com
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