linux-kernel - Re: [PATCH v5] arm64: Enable vmalloc-huge with ptdump

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Message-ID: <55f8c7a4-4535-42ff-abb7-a7cf7cd08684@arm.com>
Date: Wed, 23 Jul 2025 20:09:22 +0530
From: Dev Jain <dev.jain@....com>
To: catalin.marinas@....com, will@...nel.org
Cc: anshuman.khandual@....com, quic_zhenhuah@...cinc.com,
 ryan.roberts@....com, kevin.brodsky@....com, yangyicong@...ilicon.com,
 joey.gouly@....com, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, david@...hat.com, mark.rutland@....com
Subject: Re: [PATCH v5] arm64: Enable vmalloc-huge with ptdump


On 23/07/25 3:59 pm, Dev Jain wrote:
> [--- snip ---]

>   void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
>   {
>   	unsigned long end = ~0UL;
> @@ -311,7 +319,7 @@ void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
>   		}
>   	};
>   
> -	ptdump_walk_pgd(&st.ptdump, info->mm, NULL);
> +	arm64_ptdump_walk_pgd(&st.ptdump, info->mm, NULL);
>   }
>   
>   static void __init ptdump_initialize(void)
> @@ -353,7 +361,7 @@ bool ptdump_check_wx(void)
>   		}
>   	};
>   
> -	ptdump_walk_pgd(&st.ptdump, &init_mm, NULL);
> +	arm64_ptdump_walk_pgd(&st.ptdump, info->mm, NULL);

Brilliant, due to copy-paste I passed in info->mm here instead of init_mm.
Let me resend.

>   
>   	if (st.wx_pages || st.uxn_pages) {
>   		pr_warn("Checked W+X mappings: FAILED, %lu W+X pages found, %lu non-UXN pages found\n",