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powerpc/ptdump: Fix walk_vmemmap() to also print first vmemmap entry

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Currently walk_vmemmap() skips the first vmemmap entry pointed to by
vmemmap_list pointer itself. Fix that.

With the fix applied the vmemmap entry at 0xc00c000000000000 for hash is
displayed:

  $ cat /sys/kernel/debug/kernel_hash_pagetable
  ...
  0xc00c000000010000:     AVPN:cd7bd4e0000          ssize: 1T ...
  0xc00c000000000000:     AVPN:cd7bd4e0000          ssize: 1T ...

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
[mpe: Tweak change log wording and add example output]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/a19ee3dc2b304d39da364a592d5cd167449f8c4a.1713365940.git.ritesh.list@gmail.com
This commit is contained in:
Ritesh Harjani (IBM) 2024-04-17 20:37:40 +05:30 • committed by Michael Ellerman
parent 0db880fc86
commit f318c8be79
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/mm/ptdump/hashpagetable.c
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@ -491,7 +491,7 @@ static void walk_vmemmap(struct pg_state *st)
* Traverse the vmemmaped memory and dump pages that are in the hash
* pagetable.
*/
while (ptr->list) {
while (ptr) {
hpte_find(st, ptr->virt_addr, mmu_vmemmap_psize);
ptr = ptr->list;
}