linux-kernel - [PATCH] mtd: phram: Module parameters add writable permissions

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Message-ID: <1563076638-101332-1-git-send-email-nixiaoming@huawei.com>
Date:   Sun, 14 Jul 2019 11:57:18 +0800
From:   Xiaoming Ni <nixiaoming@...wei.com>
To:     <joern@...ybastard.org>, <dwmw2@...radead.org>,
        <computersforpeace@...il.com>, <marek.vasut@...il.com>,
        <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <nixiaoming@...wei.com>, <zhoubo.zhao@...wei.com>,
        <dylix.dailei@...wei.com>
Subject: [PATCH] mtd: phram: Module parameters add writable permissions

The phram code implements managing multiple devices through a linked
list.
However, due to the module parameter permission of 0, the
/sys/module/phram/parameters/phram interface is missing.
The command line arguments in insmod can only create one device.

Therefore, add writable permissions to the module parameters, create
/sys/module/phram/parameters/phram interface, and create multi-device
support.

Signed-off-by: Xiaoming Ni <nixiaoming@...wei.com>
---
 drivers/mtd/devices/phram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index c467286..931e5c2 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -294,7 +294,7 @@ static int phram_param_call(const char *val, const struct kernel_param *kp)
 #endif
 }
 
-module_param_call(phram, phram_param_call, NULL, NULL, 000);
+module_param_call(phram, phram_param_call, NULL, NULL, 0200);
 MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>\"");
 
 
-- 
1.8.5.6