diff options
| author | Marc Zyngier <maz@kernel.org> | 2021-10-20 09:33:21 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-10-20 19:33:53 +0100 |
| commit | f1985002839af80d6c84e9537834a81fb1364d6e (patch) | |
| tree | 95894a3dec47034acfca58a1e9b72aa8216cea27 /include/linux/irqchip.h | |
| parent | 9e1ff307c779ce1f0f810c7ecce3d95bbae40896 (diff) | |
irqchip: Provide stronger type checking for IRQCHIP_MATCH/IRQCHIP_DECLARE
Both IRQCHIP_DECLARE() and IRQCHIP_MATCH() use an underlying of_device_id()
structure to encode the matching property and the init callback.
However, this callback is stored in as a void * pointer, which obviously
defeat any attempt at stronger type checking.
Work around this by providing a new macro that builds on top of the
__typecheck() primitive, and that can be used to warn when there is
a discrepency between the drivers and core code.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211020104527.3066268-1-maz@kernel.org
Diffstat (limited to 'include/linux/irqchip.h')
| -rw-r--r-- | include/linux/irqchip.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/include/linux/irqchip.h b/include/linux/irqchip.h index 67351aac65ef..5de0dfc5d64d 100644 --- a/include/linux/irqchip.h +++ b/include/linux/irqchip.h @@ -14,8 +14,15 @@ #include <linux/acpi.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_irq.h> #include <linux/platform_device.h> +/* Undefined on purpose */ +extern of_irq_init_cb_t typecheck_irq_init_cb; + +#define typecheck_irq_init_cb(fn) \ + (__typecheck(typecheck_irq_init_cb, &fn) ? fn : fn) + /* * This macro must be used by the different irqchip drivers to declare * the association between their DT compatible string and their @@ -26,14 +33,16 @@ * @compstr: compatible string of the irqchip driver * @fn: initialization function */ -#define IRQCHIP_DECLARE(name, compat, fn) OF_DECLARE_2(irqchip, name, compat, fn) +#define IRQCHIP_DECLARE(name, compat, fn) \ + OF_DECLARE_2(irqchip, name, compat, typecheck_irq_init_cb(fn)) extern int platform_irqchip_probe(struct platform_device *pdev); #define IRQCHIP_PLATFORM_DRIVER_BEGIN(drv_name) \ static const struct of_device_id drv_name##_irqchip_match_table[] = { -#define IRQCHIP_MATCH(compat, fn) { .compatible = compat, .data = fn }, +#define IRQCHIP_MATCH(compat, fn) { .compatible = compat, \ + .data = typecheck_irq_init_cb(fn), }, #define IRQCHIP_PLATFORM_DRIVER_END(drv_name) \ {}, \ |