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| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-01-26 20:35:18 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2019-01-27 10:04:30 -0800 |
| commit | 25384ce5f9530def39421597b1457d9462df6455 (patch) | |
| tree | 7fc19542bb0395634bb3d5c2e11385269eabf474 /arch/xtensa | |
| parent | 687cffd3450911b1b7449fd6c30f598b35666b41 (diff) | |
| download | linux-0-day-25384ce5f9530def39421597b1457d9462df6455.tar.gz linux-0-day-25384ce5f9530def39421597b1457d9462df6455.tar.xz | |
xtensa: SMP: limit number of possible CPUs by NR_CPUS
This fixes the following warning at boot when the kernel is booted on a
board with more CPU cores than was configured in NR_CPUS:
smp_init_cpus: Core Count = 8
smp_init_cpus: Core Id = 0
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at include/linux/cpumask.h:121 smp_init_cpus+0x54/0x74
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 5.0.0-rc3-00015-g1459333f88a0 #124
Call Trace:
__warn$part$3+0x6a/0x7c
warn_slowpath_null+0x35/0x3c
smp_init_cpus+0x54/0x74
setup_arch+0x1c0/0x1d0
start_kernel+0x44/0x310
_startup+0x107/0x107
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/kernel/smp.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/smp.c b/arch/xtensa/kernel/smp.c index 80be6449c497e..be1f280c322cd 100644 --- a/arch/xtensa/kernel/smp.c +++ b/arch/xtensa/kernel/smp.c @@ -96,6 +96,11 @@ void __init smp_init_cpus(void) pr_info("%s: Core Count = %d\n", __func__, ncpus); pr_info("%s: Core Id = %d\n", __func__, core_id); + if (ncpus > NR_CPUS) { + ncpus = NR_CPUS; + pr_info("%s: limiting core count by %d\n", __func__, ncpus); + } + for (i = 0; i < ncpus; ++i) set_cpu_possible(i, true); } |