linux-kernel - [PATCH] ACPI: processor: idle: expose max_cstate/nocst/bm_check

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Date:   Thu, 28 Apr 2022 17:54:13 +0800
From:   Yajun Deng <yajun.deng@...ux.dev>
To:     rafael@...nel.org, lenb@...nel.org
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH] ACPI: processor: idle: expose max_cstate/nocst/bm_check_disable read-only in sysfs

This patch exposes max_cstate/nocst/bm_check_disable in read-only sysfs.
This will allow super users to verify them when changed in grub.

The parameters "nocst/bm_check_disable" is only used to be enable/disable.
So change them from integer to bool.

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
 drivers/acpi/processor_idle.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index e9c84d0ac55b..6a5572a1a80c 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -38,11 +38,11 @@
 #define ACPI_IDLE_STATE_START	(IS_ENABLED(CONFIG_ARCH_HAS_CPU_RELAX) ? 1 : 0)
 
 static unsigned int max_cstate __read_mostly = ACPI_PROCESSOR_MAX_POWER;
-module_param(max_cstate, uint, 0000);
-static unsigned int nocst __read_mostly;
-module_param(nocst, uint, 0000);
-static int bm_check_disable __read_mostly;
-module_param(bm_check_disable, uint, 0000);
+module_param(max_cstate, uint, 0400);
+static bool nocst __read_mostly;
+module_param(nocst, bool, 0400);
+static bool bm_check_disable __read_mostly;
+module_param(bm_check_disable, bool, 0400);
 
 static unsigned int latency_factor __read_mostly = 2;
 module_param(latency_factor, uint, 0644);
-- 
2.25.1