x86/resctrl: Fix typos in the mba_sc mount option

The user can control the MBA memory bandwidth in MBps (Mega
Bytes per second) units of the MBA Software Controller (mba_sc)
by using the "mba_MBps" mount option. For details, see
Documentation/x86/resctrl_ui.txt.

However, commit

  23bf1b6be9c2 ("kernfs, sysfs, cgroup, intel_rdt: Support fs_context")

changed the mount option name from "mba_MBps" to "mba_mpbs" by mistake.

Change it back from to "mba_MBps" because it is user-visible, and
correct "Opt_mba_mpbs" spelling to "Opt_mba_mbps".

 [ bp: massage commit message. ]

Fixes: 23bf1b6be9c2 ("kernfs, sysfs, cgroup, intel_rdt: Support fs_context")
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: dhowells@redhat.com
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: pei.p.jia@intel.com
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/1553896238-22130-1-git-send-email-xiaochen.shen@intel.com

diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 399601e..54b9eef 100644 (file)
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -2039,14 +2039,14 @@ out:
 enum rdt_param {
        Opt_cdp,
        Opt_cdpl2,
-       Opt_mba_mpbs,
+       Opt_mba_mbps,
        nr__rdt_params
 };
 
 static const struct fs_parameter_spec rdt_param_specs[] = {
        fsparam_flag("cdp",             Opt_cdp),
        fsparam_flag("cdpl2",           Opt_cdpl2),
-       fsparam_flag("mba_mpbs",        Opt_mba_mpbs),
+       fsparam_flag("mba_MBps",        Opt_mba_mbps),
        {}
 };
 
@@ -2072,7 +2072,7 @@ static int rdt_parse_param(struct fs_context *fc, struct fs_parameter *param)
        case Opt_cdpl2:
                ctx->enable_cdpl2 = true;
                return 0;
-       case Opt_mba_mpbs:
+       case Opt_mba_mbps:
                if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
                        return -EINVAL;
                ctx->enable_mba_mbps = true;