linux-kernel - [PATCH RFC 2/3] misc: move FLASH_MINOR into miscdevice.h and fix conflicts

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Date:   Mon,  9 Mar 2020 10:17:46 +0800
From:   Zhenzhong Duan <zhenzhong.duan@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     jdike@...toit.com, richard@....at, anton.ivanov@...bridgegreys.com,
        miguel.ojeda.sandonis@...il.com, willy@...roxy.com,
        ksenija.stanojevic@...il.com, arnd@...db.de,
        gregkh@...uxfoundation.org, mpm@...enic.com,
        herbert@...dor.apana.org.au, jonathan@...zard.org.uk,
        benh@...nel.crashing.org, davem@...emloft.net,
        b.zolnierkie@...sung.com, rjw@...ysocki.net, pavel@....cz,
        len.brown@...el.com, Zhenzhong Duan <zhenzhong.duan@...il.com>,
        Russell King <linux@...linux.org.uk>
Subject: [PATCH RFC 2/3] misc: move FLASH_MINOR into miscdevice.h and fix conflicts

FLASH_MINOR is used in both drivers/char/nwflash.c and
drivers/sbus/char/flash.c with conflict minor numbers.

Move all the definitions of FLASH_MINOR into miscdevice.h.
Rename FLASH_MINOR for drivers/char/nwflash.c to NWFLASH_MINOR
and FLASH_MINOR for drivers/sbus/char/flash.c to SBUS_FLASH_MINOR.

Link: https://lore.kernel.org/lkml/20200120221323.GJ15860@mit.edu/t/
Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Russell King <linux@...linux.org.uk>
Cc: "David S. Miller" <davem@...emloft.net>
---
 arch/arm/include/asm/nwflash.h | 1 -
 drivers/char/nwflash.c         | 2 +-
 drivers/sbus/char/flash.c      | 4 +---
 include/linux/miscdevice.h     | 2 ++
 4 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/arm/include/asm/nwflash.h b/arch/arm/include/asm/nwflash.h
index 0ec6f07..66b7e68 100644
--- a/arch/arm/include/asm/nwflash.h
+++ b/arch/arm/include/asm/nwflash.h
@@ -2,7 +2,6 @@
 #ifndef _FLASH_H
 #define _FLASH_H
 
-#define FLASH_MINOR		 160	/* MAJOR is 10 - miscdevice */
 #define CMD_WRITE_DISABLE	 0
 #define CMD_WRITE_ENABLE	 0x28
 #define CMD_WRITE_BASE64K_ENABLE 0x47
diff --git a/drivers/char/nwflash.c b/drivers/char/nwflash.c
index a4a0797d..0973c2c 100644
--- a/drivers/char/nwflash.c
+++ b/drivers/char/nwflash.c
@@ -576,7 +576,7 @@ static void kick_open(void)
 
 static struct miscdevice flash_miscdev =
 {
-	FLASH_MINOR,
+	NWFLASH_MINOR,
 	"nwflash",
 	&flash_fops
 };
diff --git a/drivers/sbus/char/flash.c b/drivers/sbus/char/flash.c
index e85a05a..4147d22 100644
--- a/drivers/sbus/char/flash.c
+++ b/drivers/sbus/char/flash.c
@@ -31,8 +31,6 @@
 	unsigned long busy;		/* In use? */
 } flash;
 
-#define FLASH_MINOR	152
-
 static int
 flash_mmap(struct file *file, struct vm_area_struct *vma)
 {
@@ -157,7 +155,7 @@
 	.release =	flash_release,
 };
 
-static struct miscdevice flash_dev = { FLASH_MINOR, "flash", &flash_fops };
+static struct miscdevice flash_dev = { SBUS_FLASH_MINOR, "flash", &flash_fops };
 
 static int flash_probe(struct platform_device *op)
 {
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 35294c6..41dc10b 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -30,12 +30,14 @@
 #define SUN_OPENPROM_MINOR	139
 #define DMAPI_MINOR		140	/* unused */
 #define NVRAM_MINOR		144
+#define SBUS_FLASH_MINOR	152
 #define SGI_MMTIMER		153
 #define PMU_MINOR		154
 #define STORE_QUEUE_MINOR	155	/* unused */
 #define LCD_MINOR		156
 #define AC_MINOR		157
 #define BUTTON_MINOR		158	/* Major 10, Minor 158, /dev/nwbutton */
+#define NWFLASH_MINOR		160	/* MAJOR is 10 - miscdevice */
 #define ENVCTRL_MINOR		162
 #define I2O_MINOR		166
 #define UCTRL_MINOR		174
-- 
1.8.3.1