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Subject[PATCH] gpio: of: Build fails if CONFIG_OF_DYNAMIC enabled without CONFIG_OF_GPIO
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The symbol 'gpio_of_notifier' doesn't exist without both CONFIG_OF_GPIO
and CONFIG_OF_DYNAMIC enabled, but is referenced when only
CONFIG_OF_DYNAMIC is enabled.

This broke building with 'make ARCH=um allyesconfig':
---------------
/usr/bin/ld: drivers/gpio/gpiolib.o: in function `gpiolib_dev_init':
./drivers/gpio/gpiolib.c:5293: undefined reference to `gpio_of_notifier'
collect2: error: ld returned 1 exit status
---------------

Fixes: 63636d956c45 ("gpio: of: Add DT overlay support for GPIO hogs")
Signed-off-by: David Gow <davidgow@google.com>
---
drivers/gpio/gpiolib.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 40f2d7f69be2..5c292fb3355c 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -5289,8 +5289,9 @@ static int __init gpiolib_dev_init(void)
gpiolib_initialized = true;
gpiochip_setup_devs();

- if (IS_ENABLED(CONFIG_OF_DYNAMIC))
- WARN_ON(of_reconfig_notifier_register(&gpio_of_notifier));
+#if IS_ENABLED(CONFIG_OF_DYNAMIC) && IS_ENABLED(CONFIG_OF_GPIO)
+ WARN_ON(of_reconfig_notifier_register(&gpio_of_notifier));
+#endif /* CONFIG_OF_DYNAMIC && CONFIG_OF_GPIO */

return ret;
}
--
2.26.2.303.gf8c07b1a785-goog
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