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Subject[PATCH] x86, smpboot: fix announce_cpu() to print the last OK
Date
When booting cpu, announce_cpu() is called to show which cpu is up
as following:
[ 0.402751] smpboot: Booting Node 0, Processors #1 #2 #3 #4 #5 OK
[ 0.525667] smpboot: Booting Node 1, Processors #6 #7 #8 #9 #10 #11 OK
[ 0.755592] smpboot: Booting Node 0, Processors #12 #13 #14 #15 #16 #17 OK
[ 0.890495] smpboot: Booting Node 1, Processors #18 #19 #20 #21 #22 #23
But the last OK is lost, because 'nr_cpu_ids-1' represents the maxinum possible
cpu id. It should use the maxinum present cpu id.

Signed-off-by: Libin <huawei.libin@huawei.com>
---
arch/x86/kernel/smpboot.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index aecc98a..549b8cb 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -653,6 +653,8 @@ static void announce_cpu(int cpu, int apicid)
{
static int current_node = -1;
int node = early_cpu_to_node(cpu);
+ int max_cpu_present =
+ find_last_bit(cpumask_bits(cpu_present_mask), NR_CPUS);

if (system_state == SYSTEM_BOOTING) {
if (node != current_node) {
@@ -661,7 +663,7 @@ static void announce_cpu(int cpu, int apicid)
current_node = node;
pr_info("Booting Node %3d, Processors ", node);
}
- pr_cont(" #%d%s", cpu, cpu == (nr_cpu_ids - 1) ? " OK\n" : "");
+ pr_cont(" #%d%s", cpu, cpu == max_cpu_present ? " OK\n" : "");
return;
} else
pr_info("Booting Node %d Processor %d APIC 0x%x\n",
--
1.8.2.1



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