diff options
| author | David Brownell <david-b@pacbell.net> | 2008-03-05 02:08:29 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-03-06 15:18:18 +0300 |
| commit | 37aca70c626ce8f4e5848de2d4892b5ed74a6875 (patch) | |
| tree | b3d257db13913e55ff93b6b908be69a883ee2ad4 /arch/arm/mach-at91/gpio.c | |
| parent | b24061fadc2b996fd38baaf01986eac666d0c61b (diff) | |
| download | linux-37aca70c626ce8f4e5848de2d4892b5ed74a6875.tar.xz | |
[ARM] 4848/1: at91: remove 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 <dbrownell@users.sourceforge.net>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-at91/gpio.c')
| -rw-r--r-- | arch/arm/mach-at91/gpio.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c index f629c2b5f0c5..ee4964abcaf5 100644 --- a/arch/arm/mach-at91/gpio.c +++ b/arch/arm/mach-at91/gpio.c @@ -490,6 +490,11 @@ postcore_initcall(at91_gpio_debugfs_init); /*--------------------------------------------------------------------------*/ +/* 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; + /* * Called from the processor-specific init to enable GPIO interrupt support. */ @@ -510,6 +515,8 @@ void __init at91_gpio_irq_setup(void) __raw_writel(~0, this->regbase + PIO_IDR); for (i = 0, pin = this->chipbase; i < 32; i++, pin++) { + lockdep_set_class(&irq_desc[pin].lock, &gpio_lock_class); + /* * Can use the "simple" and not "edge" handler since it's * shorter, and the AIC handles interrupts sanely. |