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p_state is unsigned since the commit 2f064a59a11f The patch also uses TASK_RUNNING instead of null. Fixes: 2f064a59a11f ("sched: Change task_struct::state") Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211026133108.7113-1-kda@linux-powerpc.org