[PATCH v2 0/6] Stop NULLifying match pointer in of_match_device()

[Stephen Boyd]

(This is a continuation of this series[1] per Rob's request. I've picked
up the acks, etc. with b4 and compile tested the patches along with an
arm64 allmodconfig build. Presumably Rob will pick these up directly.)

of_match_device() uses of_match_ptr() to make the match table argument
NULL via the pre-processor when CONFIG_OF=n. This makes life harder for
compilers who think that match tables are never used and warn about
unused variables when CONFIG_OF=n. This series changes various callers
to use of_device_get_match_data() instead, which doesn't have this
problem, and removes the of_match_ptr() usage from of_match_device() so
that the compiler can stop complaining about unused variables. It will
do dead code elimination instead and remove the match table if it isn't
actually used.

[1] https://lore.kernel.org/r/20191004214334.149976-1-swboyd@xxxxxxxxxxxx

Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Frank Rowand <frowand.list@xxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Grygorii Strashko <grygorii.strashko@xxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Jacopo Mondi <jacopo@xxxxxxxxxx>
Cc: Jean Delvare <jdelvare@xxxxxxxx>
Cc: Jiri Slaby <jslaby@xxxxxxxx>
Cc: <linux-hwmon@xxxxxxxxxxxxxxx>
Cc: <linux-kernel@xxxxxxxxxxxxxxx>,
Cc: <linux-media@xxxxxxxxxxxxxxx>
Cc: <linux-omap@xxxxxxxxxxxxxxx>
Cc: <linux-renesas-soc@xxxxxxxxxxxxxxx>
Cc: <linux-serial@xxxxxxxxxxxxxxx>
Cc: <linux-usb@xxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Richard Leitner <richard.leitner@xxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>

Stephen Boyd (6):
  media: renesas-ceu: Use of_device_get_match_data()
  drivers: net: davinci_mdio: Use of_device_get_match_data()
  serial: stm32: Use of_device_get_match_data()
  usb: usb251xb: Use of_device_get_match_data()
  hwmon: (lm70) Avoid undefined reference to match table
  of/device: Don't NULLify match table in of_match_device() with
    CONFIG_OF=n

 drivers/hwmon/lm70.c                   |  2 +-
 drivers/media/platform/renesas-ceu.c   |  2 +-
 drivers/net/ethernet/ti/davinci_mdio.c | 12 ++---
 drivers/tty/serial/stm32-usart.c       | 71 ++++++++++++--------------
 drivers/tty/serial/stm32-usart.h       |  2 +-
 drivers/usb/misc/usb251xb.c            | 12 ++---
 include/linux/of_device.h              |  4 +-
 7 files changed, 47 insertions(+), 58 deletions(-)


base-commit: 19c329f6808995b142b3966301f217c831e7cf31
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