Re: [PATCH] irqchip/gic-v5: Fix kmemleak L2 IST table entries false positives

[Catalin Marinas <catalin.marinas@arm.com>]

On Mon, Aug 11, 2025 at 03:50:01PM +0200, Lorenzo Pieralisi wrote:
> diff --git a/drivers/irqchip/irq-gic-v5-irs.c b/drivers/irqchip/irq-gic-v5-irs.c
> index ad1435a858a4..e8a576f66366 100644
> --- a/drivers/irqchip/irq-gic-v5-irs.c
> +++ b/drivers/irqchip/irq-gic-v5-irs.c
> @@ -5,6 +5,7 @@
>  
>  #define pr_fmt(fmt)	"GICv5 IRS: " fmt
>  
> +#include <linux/kmemleak.h>
>  #include <linux/log2.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> @@ -117,6 +118,7 @@ static int __init gicv5_irs_init_ist_linear(struct gicv5_irs_chip_data *irs_data
>  		kfree(ist);
>  		return ret;
>  	}
> +	kmemleak_ignore(ist);

Nit: if you ever respin, please add a short comment on why this is a
false positive (easier to see it in the code than the git logs).

>  
>  	return 0;
>  }
> @@ -232,6 +234,7 @@ int gicv5_irs_iste_alloc(const u32 lpi)
>  		kfree(l2ist);
>  		return ret;
>  	}
> +	kmemleak_ignore(l2ist);

Same here.

-- 
Catalin