arm64/ptdump:display the Linear Mapping start marker

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 end* marker.

Since *Linear Mapping start* is the first marker, use initialise 'level'
to -1 in order to display it.

Signed-off-by: Hailong Liu <liu.hailong6@zte.com.cn>
Link: https://lore.kernel.org/r/20210202150749.10104-1-liuhailongg6@163.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
index 04137a8f3d2de4f87305c1ef445032752c6124db..0e050d76b83aab01bf39493fb8c31829bc48c767 100644 (file)
--- 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[]){