[v6 PATCH 5/6] RISC-V: Compare cpuid with NR_CPUS before mapping.

[Atish Patra]

We should never have a cpuid greater that NR_CPUS. Compare with NR_CPUS
before creating the mapping between logical and physical CPU ids. This
is also mandatory as NR_CPUS check is removed from
riscv_of_processor_hartid.

Signed-off-by: Atish Patra <atish.pa...@wdc.com>
Reviewed-by: Anup Patel <a...@brainfault.org>
Reviewed-by: Christoph Hellwig <h...@lst.de>
---
 arch/riscv/kernel/smpboot.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index d369b669..eb533b5c 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -66,6 +66,11 @@ void __init setup_smp(void)
                        found_boot_cpu = 1;
                        continue;
                }
+               if (cpuid >= NR_CPUS) {
+                       pr_warn("Invalid cpuid [%d] for hartid [%d]\n",
+                               cpuid, hart);
+                       break;
+               }
 
                cpuid_to_hartid_map(cpuid) = hart;
                set_cpu_possible(cpuid, true);
-- 
2.7.4