diff options
| author | Zhenzhong Duan <zhenzhong.duan@oracle.com> | 2019-01-17 02:10:59 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-24 07:58:57 +0200 |
| commit | f2a02afce64066409928d68d6f70e222529eb519 (patch) | |
| tree | 9b6b896fb86c4d423e050513f66e0e2a1593c3b5 | |
| parent | c91df26c71058853a7e97f403e45163db1be0472 (diff) | |
x86/speculation: Remove redundant arch_smt_update() invocation
commit 34d66caf251df91ff27b24a3a786810d29989eca upstream.
With commit a74cfffb03b7 ("x86/speculation: Rework SMT state change"),
arch_smt_update() is invoked from each individual CPU hotplug function.
Therefore the extra arch_smt_update() call in the sysfs SMT control is
redundant.
Fixes: a74cfffb03b7 ("x86/speculation: Rework SMT state change")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <konrad.wilk@oracle.com>
Cc: <dwmw@amazon.co.uk>
Cc: <bp@suse.de>
Cc: <srinivas.eeda@oracle.com>
Cc: <peterz@infradead.org>
Cc: <hpa@zytor.com>
Link: https://lkml.kernel.org/r/e2e064f2-e8ef-42ca-bf4f-76b612964752@default
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/cpu.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 1fbe93fefc1f..a542b5e58350 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -2027,10 +2027,8 @@ int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) */ cpuhp_offline_cpu_device(cpu); } - if (!ret) { + if (!ret) cpu_smt_control = ctrlval; - arch_smt_update(); - } cpu_maps_update_done(); return ret; } @@ -2041,7 +2039,6 @@ int cpuhp_smt_enable(void) cpu_maps_update_begin(); cpu_smt_control = CPU_SMT_ENABLED; - arch_smt_update(); for_each_present_cpu(cpu) { /* Skip online CPUs and CPUs on offline nodes */ if (cpu_online(cpu) || !node_online(cpu_to_node(cpu))) |