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gpio: lpc18xx: fix GPIO controller driver build as a module

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The problem is reported for allmodconfig build setup:

  ERROR: "irq_chip_retrigger_hierarchy" [drivers/gpio/gpio-lpc18xx.ko] undefined!
  make[2]: *** [scripts/Makefile.modpost:92: __modpost] Error 1
  make[1]: *** [Makefile:1271: modules] Error 2

My testing in runtime shows that it is sufficient to remove .irq_retrigger
callback, which is assigned to unexported irq_chip_retrigger_hierarchy()
function, I did't observe any regressions, and thus apparently it is a
better fix rather than exporting the function defined in kernel/irq/chip.c
(see commit 52b2a05fa7 ("genirq: Export IRQ functions for module use"))
or sticking the GPIO controller driver build to built-in option only.

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: 5ddabfe8d3 ("gpio: lpc18xx: add GPIO pin interrupt controller support")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Vladimir Zapolskiy 2018-12-08 16:38:41 +02:00 committed by Linus Walleij
parent b00b7980af
commit 67566ae474
1 changed files with 0 additions and 2 deletions
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2
drivers/gpio/gpio-lpc18xx.c
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@ -11,7 +11,6 @@
#include <linux/gpio/driver.h> #include <linux/gpio/driver.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <linux/irqchip.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_address.h> #include <linux/of_address.h>
@ -158,7 +157,6 @@ static struct irq_chip lpc18xx_gpio_pin_ic = {
.irq_unmask = lpc18xx_gpio_pin_ic_unmask, .irq_unmask = lpc18xx_gpio_pin_ic_unmask,
.irq_eoi = lpc18xx_gpio_pin_ic_eoi, .irq_eoi = lpc18xx_gpio_pin_ic_eoi,
.irq_set_type = lpc18xx_gpio_pin_ic_set_type, .irq_set_type = lpc18xx_gpio_pin_ic_set_type,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.flags = IRQCHIP_SET_TYPE_MASKED, .flags = IRQCHIP_SET_TYPE_MASKED,
}; };