From: David Brownell Date: Tue, 26 Feb 2008 19:10:50 +0000 (-0800) Subject: ARM: OMAP: fix false lockdep warnings X-Git-Tag: firefly_0821_release~22011^2~4^2~11 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8ba55c5c139f9be26b87d3aab9998f54d8d3057a;p=firefly-linux-kernel-4.4.55.git ARM: OMAP: fix false lockdep warnings Remove false lockdep warnings about lock recursion when declaring IRQs as being wake-capable, by marking putting GPIO irq_desc locks into their own class. (Thanks to Peter Zijlstra for helping track down such a small fix to this problem.) Signed-off-by: David Brownell Signed-off-by: Tony Lindgren --- diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index 56f4d1394d56..9030495509f8 100644 --- a/arch/arm/plat-omap/gpio.c +++ b/arch/arm/plat-omap/gpio.c @@ -1277,6 +1277,11 @@ static struct clk *gpio_fclks[OMAP34XX_NR_GPIOS]; static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS]; #endif +/* This lock class tells lockdep that GPIO irqs are in a different + * category than their parents, so it won't report false recursion. + */ +static struct lock_class_key gpio_lock_class; + static int __init _omap_gpio_init(void) { int i; @@ -1450,6 +1455,7 @@ static int __init _omap_gpio_init(void) #endif for (j = bank->virtual_irq_start; j < bank->virtual_irq_start + gpio_count; j++) { + lockdep_set_class(&irq_desc[j].lock, &gpio_lock_class); set_irq_chip_data(j, bank); if (bank_is_mpuio(bank)) set_irq_chip(j, &mpuio_irq_chip);