linux-kernel - Re: [RFC PATCH v2] iommu/amd: gray the 'irq_remap

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Message-ID: <20151202111735.GC18805@8bytes.org>
Date:	Wed, 2 Dec 2015 12:17:35 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Catalin Marinas <catalin.marinas@...il.com>
Cc:	Michael Wang <yun.wang@...fitbricks.com>,
	iommu@...ts.linux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v2] iommu/amd: gray the 'irq_remap_table' object for
 kmemleak

On Wed, Dec 02, 2015 at 10:52:02AM +0000, Catalin Marinas wrote:
> diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
> index 013bdfff2d4d..c41609f71cbe 100644
> --- a/drivers/iommu/amd_iommu_init.c
> +++ b/drivers/iommu/amd_iommu_init.c
> @@ -27,6 +27,7 @@
>  #include <linux/amd-iommu.h>
>  #include <linux/export.h>
>  #include <linux/iommu.h>
> +#include <linux/kmemleak.h>
>  #include <asm/pci-direct.h>
>  #include <asm/iommu.h>
>  #include <asm/gart.h>
> @@ -1692,6 +1693,7 @@ static struct syscore_ops amd_iommu_syscore_ops = {
> 
>  static void __init free_on_init_error(void)
>  {
> + kmemleak_free(irq_lookup_table);
>   free_pages((unsigned long)irq_lookup_table,
>     get_order(rlookup_table_size));
> 
> @@ -1906,6 +1908,7 @@ static int __init early_amd_iommu_init(void)
>   irq_lookup_table = (void *)__get_free_pages(
>   GFP_KERNEL | __GFP_ZERO,
>   get_order(rlookup_table_size));
> + kmemleak_alloc(irq_lookup_table, rlookup_table_size, 1, GFP_KERNEL);
>   if (!irq_lookup_table)
>   goto out;
>   }

Yes, this looks way better.

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