releases/4.4.177/xtensa-smp-mark-each-possible-cpu-as-present.patch

   1 From 4ddd1118c527ed190f71dc19440545dd8e9438dc Mon Sep 17 00:00:00 2001
   2 From: Max Filippov <jcmvbkbc@gmail.com>
   3 Date: Sat, 19 Jan 2019 00:26:48 -0800
   4 Subject: xtensa: SMP: mark each possible CPU as present
   5
   6 [ Upstream commit 8b1c42cdd7181200dc1fff39dcb6ac1a3fac2c25 ]
   7
   8 Otherwise it is impossible to enable CPUs after booting with 'maxcpus'
   9 parameter.
  10
  11 Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
  12 Signed-off-by: Sasha Levin <sashal@kernel.org>
  13 ---
  14  arch/xtensa/kernel/smp.c | 2 +-
  15  1 file changed, 1 insertion(+), 1 deletion(-)
  16
  17 diff --git a/arch/xtensa/kernel/smp.c b/arch/xtensa/kernel/smp.c
  18 index 545144d1431d..0e34c1ed4aa8 100644
  19 --- a/arch/xtensa/kernel/smp.c
  20 +++ b/arch/xtensa/kernel/smp.c
  21 @@ -80,7 +80,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
  22  {
  23         unsigned i;
  24
  25 -       for (i = 0; i < max_cpus; ++i)
  26 +       for_each_possible_cpu(i)
  27                 set_cpu_present(i, true);
  28  }
  29
  30 --
  31 2.19.1
  32