linux-kernel - [PATCH] intel-rdt: show mount options

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Message-ID: <9892546694d8a9d5fad52c64fe5f16485198c38a.1480537792.git.shli@fb.com>
Date:   Wed, 30 Nov 2016 12:31:42 -0800
From:   Shaohua Li <shli@...com>
To:     <linux-kernel@...r.kernel.org>
CC:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] intel-rdt: show mount options

Show mount options when cdp is enabled

Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Shaohua Li <shli@...com>
---
 arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index fb8e03e..49438b0 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -1034,9 +1034,19 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)
 	return ret;
 }
 
+static int rdtgroup_show_options(struct seq_file *seq,
+	struct kernfs_root *kf_root)
+{
+	struct rdt_resource *r_l3data = &rdt_resources_all[RDT_RESOURCE_L3DATA];
+	if (r_l3data->enabled)
+		seq_puts(seq, ",cdp");
+	return 0;
+}
+
 static struct kernfs_syscall_ops rdtgroup_kf_syscall_ops = {
 	.mkdir	= rdtgroup_mkdir,
 	.rmdir	= rdtgroup_rmdir,
+	.show_options = rdtgroup_show_options,
 };
 
 static int __init rdtgroup_setup_root(void)
-- 
2.9.3