linux-toradex.git/include/linux/miscdevice.h, branch v7.0-rc5

char/mwave: drop it

2025-12-29T10:53:38+00:00

When I tried to clean up the driver a bit, Arnd noted:
> According to thinkwiki.de, the 3780i modem was only used in a
> couple of Thinkpad models that are now over 25 years old, using
> Pentium II processors, and they all have a physical RS232 port
> that can be used to connect an external modem instead.
>
> Maybe we can just retire this driver?

So instead of the clean up, drop the driver altogether.

Signed-off-by: Jiri Slaby (SUSE) 
Suggested-by: Arnd Bergmann 
Link: https://lore.kernel.org/all/b8834e5d-fdde-4b1a-8757-288dddc507a9@app.fastmail.com/
Link: https://patch.msgid.link/20251124103952.995229-1-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman

char: misc: Register fixed minor EISA_EEPROM_MINOR in linux/miscdevice.h

2025-08-19T10:41:18+00:00

Move fixed minor EISA_EEPROM_MINOR definition to linux/miscdevice.h.

Signed-off-by: Zijun Hu 
Link: https://lore.kernel.org/r/20250714-rfc_miscdev-v6-7-2ed949665bde@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman

char: misc: Disallow registering miscdevice whose minor > MISC_DYNAMIC_MINOR

2025-08-19T10:41:17+00:00

Currently, It is allowed to register miscdevice with minor > 255
which is defined by macro MISC_DYNAMIC_MINOR, and cause:

- Chaos regarding division and management of minor codes.
- Registering failure if the minor was allocated to other dynamic request.

Fortunately, in-kernel users have not had such usage yet.
Fix by refusing to register miscdevice whose minor > 255.

Also bring in a very simple minor code space division and management:

<  255 : Fixed minor code
== 255 : Indicator to request dynamic minor code
>  255 : Dynamic minor code requested, 1048320 minor codes totally
And all fixed minors allocated should be registered in 'linux/miscdevice.h'

Signed-off-by: Zijun Hu 
Link: https://lore.kernel.org/r/20250714-rfc_miscdev-v6-3-2ed949665bde@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman

char: misc: Remove redundant forward declarations

2025-06-24T15:48:02+00:00

Header miscdevice.h includes linux/device.h which has definations for
below two forward declarations directly or indirectly:

struct device;
struct attribute_group;

Remove these redundant forward declarations from miscdevice.h

Signed-off-by: Zijun Hu 
Link: https://lore.kernel.org/r/20250620-fix_mischar-v1-1-6c2716bbf1fa@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman

misc: trivial: Remove undesired double space from struct definition

2024-12-23T18:14:28+00:00

When one is too lazy to use an LSP to conduct look-ups on struct
definitions, one might use the ever useful `struct  {` search
string.  However this doesn't work with `struct miscdevice  {` because
of a stray double space.  Assuming that this wasn't intentional, let's
simply remove it.

Signed-off-by: Lee Jones 
Link: https://lore.kernel.org/r/20241223151843.472645-1-lee@kernel.org
Signed-off-by: Greg Kroah-Hartman

misc: Mark MICROCODE_MINOR unused

2022-07-27T12:04:52+00:00

This one is unused since

  181b6f40e9ea ("x86/microcode: Rip out the OLD_INTERFACE")

so comment it out.

Link: https://lore.kernel.org/r/20220525161232.14924-1-bp@alien8.de
Cc: Arnd Bergmann 
Cc: Greg Kroah-Hartman 
Signed-off-by: Borislav Petkov 
Link: https://lore.kernel.org/r/20220727114948.30123-1-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman

include/linux/miscdevice.h - Fix typo/grammar

2020-08-28T10:37:42+00:00

Improve the clarity and grammar of descriptive comment on top of the
minor number assignments.

Fix a typo within 2 comments for macros.
s/This helps in eleminating of boilerplate code.
 /This helps to eliminate boilerplate code./

Signed-off-by: Sebastian Fricke 
Link: https://lore.kernel.org/r/20200803054346.4285-1-sebastian.fricke.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman

rtc/ia64: remove legacy efirtc driver

2020-03-19T06:41:02+00:00

There are two EFI RTC drivers, the original drivers/char/efirtc.c
driver and the more modern drivers/rtc/rtc-efi.c.

Both implement the same interface, but the new one does so
in a more portable way.

Move everything over to that one and remove the old one.

Cc: linux-ia64@vger.kernel.org
Cc: Fenghua Yu 
Cc: Tony Luck 
Cc: Stephane Eranian 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Alexandre Belloni 
Link: https://lore.kernel.org/r/20200226224322.187960-1-alexandre.belloni@bootlin.com
Signed-off-by: Greg Kroah-Hartman

misc: move FLASH_MINOR into miscdevice.h and fix conflicts

2020-03-18T11:27:04+00:00

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 
Signed-off-by: Zhenzhong Duan 
Acked-by: Arnd Bergmann 
Cc: Greg Kroah-Hartman 
Cc: Russell King 
Cc: "David S. Miller" 
Link: https://lore.kernel.org/r/20200311071654.335-3-zhenzhong.duan@gmail.com
Signed-off-by: Greg Kroah-Hartman

misc: cleanup minor number definitions in c file into miscdevice.h

2020-03-18T11:27:03+00:00

HWRNG_MINOR and RNG_MISCDEV_MINOR are duplicate definitions, use
unified HWRNG_MINOR instead and moved into miscdevice.h

ANSLCD_MINOR and LCD_MINOR are duplicate definitions, use unified
LCD_MINOR instead and moved into miscdevice.h

MISCDEV_MINOR is renamed to PXA3XX_GCU_MINOR and moved into
miscdevice.h

Other definitions are just moved without any change.

Link: https://lore.kernel.org/lkml/20200120221323.GJ15860@mit.edu/t/
Suggested-by: Arnd Bergmann 
Build-tested-by: Willy TARREAU 
Build-tested-by: Miguel Ojeda 
Signed-off-by: Zhenzhong Duan 
Acked-by: Miguel Ojeda 
Acked-by: Arnd Bergmann 
Acked-by: Herbert Xu 
Link: https://lore.kernel.org/r/20200311071654.335-2-zhenzhong.duan@gmail.com
Signed-off-by: Greg Kroah-Hartman