linux-kernel - [PATCH] arm64/ptdump:display the Linear Mapping start marker

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Date:   Tue,  2 Feb 2021 23:07:49 +0800
From:   Hailong Liu <liuhailongg6@....com>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Will Deacon <will@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Steven Price <steven.price@....com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Mark Brown <broonie@...nel.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Hailong Liu <liu.hailong6@....com.cn>
Subject: [PATCH] arm64/ptdump:display the Linear Mapping start marker

From: Hailong Liu <liu.hailong6@....com.cn>

The current /sys/kernel/debug/kernel_page_tables does not display the
*Linear Mapping start* marker on arm64, which I think should be paired
with the *Linear Mapping start* marker.

Since *Linear Mapping start* is the first marker, use level=-1 to display it.

Signed-off-by: Hailong Liu <liu.hailong6@....com.cn>
---
 arch/arm64/mm/ptdump.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
index 04137a8f3d2d..0e050d76b83a 100644
--- a/arch/arm64/mm/ptdump.c
+++ b/arch/arm64/mm/ptdump.c
@@ -324,6 +324,7 @@ void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
 	st = (struct pg_state){
 		.seq = s,
 		.marker = info->markers,
+		.level = -1,
 		.ptdump = {
 			.note_page = note_page,
 			.range = (struct ptdump_range[]){
-- 
2.17.1