linux/arch/powerpc
Luca Ceresoli 9722c3b66e of: remove internal arguments from of_property_for_each_u32()
The of_property_for_each_u32() macro needs five parameters, two of which
are primarily meant as internal variables for the macro itself (in the
for() clause). Yet these two parameters are used by a few drivers, and this
can be considered misuse or at least bad practice.

Now that the kernel uses C11 to build, these two parameters can be avoided
by declaring them internally, thus changing this pattern:

  struct property *prop;
  const __be32 *p;
  u32 val;

  of_property_for_each_u32(np, "xyz", prop, p, val) { ... }

to this:

  u32 val;

  of_property_for_each_u32(np, "xyz", val) { ... }

However two variables cannot be declared in the for clause even with C11,
so declare one struct that contain the two variables we actually need. As
the variables inside this struct are not meant to be used by users of this
macro, give the struct instance the noticeable name "_it" so it is visible
during code reviews, helping to avoid new code to use it directly.

Most usages are trivially converted as they do not use those two
parameters, as expected. The non-trivial cases are:

 - drivers/clk/clk.c, of_clk_get_parent_name(): easily doable anyway
 - drivers/clk/clk-si5351.c, si5351_dt_parse(): this is more complex as the
   checks had to be replicated in a different way, making code more verbose
   and somewhat uglier, but I refrained from a full rework to keep as much
   of the original code untouched having no hardware to test my changes

All the changes have been build tested. The few for which I have the
hardware have been runtime-tested too.

Reviewed-by: Andre Przywara <andre.przywara@arm.com> # drivers/clk/sunxi/clk-simple-gates.c, drivers/clk/sunxi/clk-sun8i-bus-gates.c
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> # drivers/gpio/gpio-brcmstb.c
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> # drivers/irqchip/irq-atmel-aic-common.c
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # drivers/iio/adc/ti_am335x_adc.c
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> # drivers/pwm/pwm-samsung.c
Acked-by: Richard Leitner <richard.leitner@linux.dev> # drivers/usb/misc/usb251xb.c
Acked-by: Mark Brown <broonie@kernel.org> # sound/soc/codecs/arizona.c
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com> # sound/soc/codecs/arizona.c
Acked-by: Michael Ellerman <mpe@ellerman.id.au> # arch/powerpc/sysdev/xive/spapr.c
Acked-by: Stephen Boyd <sboyd@kernel.org> # clk
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20240724-of_property_for_each_u32-v3-1-bea82ce429e2@bootlin.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
2024-07-25 06:53:47 -05:00
..
boot powerpc: Remove 40x leftovers 2024-07-12 11:43:41 +10:00
configs powerpc/configs: Update defconfig with now user-visible CONFIG_FSL_IFC 2024-07-04 23:10:40 +10:00
crypto This update includes the following changes: 2024-07-19 08:52:58 -07:00
include - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
kernel - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
kexec powerpc updates for 6.11 2024-07-19 21:00:33 -07:00
kvm ARM: 2024-07-20 12:41:03 -07:00
lib powerpc updates for 6.10 2024-05-17 09:05:46 -07:00
math-emu powerpc/math-emu: Inhibit W=1 warnings 2022-09-08 11:11:18 +10:00
mm - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
net powerpc updates for 6.11 2024-07-19 21:00:33 -07:00
perf powerpc/perf: Set cpumode flags using sample address 2024-06-17 22:47:16 +10:00
platforms powerpc updates for 6.11 2024-07-19 21:00:33 -07:00
purgatory Makefile: remove redundant tool coverage variables 2024-05-14 23:35:48 +09:00
sysdev of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
tools powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh 2023-10-20 17:46:33 +11:00
xmon powerpc/xmon: Fix disassembly CPU feature checks 2024-07-11 17:31:54 +10:00
Kbuild powerpc: Fix fatal warnings flag for LLVM's integrated assembler 2024-04-08 16:06:41 +10:00
Kconfig Kbuild updates for v6.11 2024-07-23 14:32:21 -07:00
Kconfig.debug powerpc: Remove 40x from Kconfig and defconfig 2024-06-28 22:28:47 +10:00
Makefile powerpc: Remove 40x from Kconfig and defconfig 2024-06-28 22:28:47 +10:00
Makefile.postlink kbuild: remove ARCH_POSTLINK from module builds 2023-10-28 21:10:08 +09:00