[PATCH] powerpc/ptdump: Fix walk_vmemmap to also print first vmemmap entry

[PATCH] powerpc/ptdump: Fix walk_vmemmap to also print first vmemmap entry

[Ritesh Harjani (IBM)]

walk_vmemmap() was skipping the first vmemmap entry pointed by
vmemmap_list pointer itself. This patch fixes that.

With this we should see the vmemmap entry at 0xc00c000000000000 for hash
which wasn't getting printed on doing

"cat /sys/kernel/debug/kernel_hash_pagetable"

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
---
 arch/powerpc/mm/ptdump/hashpagetable.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/ptdump/hashpagetable.c b/arch/powerpc/mm/ptdump/hashpagetable.c
index 9a601587836b..a6baa6166d94 100644
--- a/arch/powerpc/mm/ptdump/hashpagetable.c
+++ b/arch/powerpc/mm/ptdump/hashpagetable.c
@@ -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;
 	}
--
2.44.0

Re: [PATCH] powerpc/ptdump: Fix walk_vmemmap to also print first vmemmap entry

[Michael Ellerman]

On Wed, 17 Apr 2024 20:37:40 +0530, Ritesh Harjani (IBM) wrote:
> walk_vmemmap() was skipping the first vmemmap entry pointed by
> vmemmap_list pointer itself. This patch fixes that.
> 
> With this we should see the vmemmap entry at 0xc00c000000000000 for hash
> which wasn't getting printed on doing
> 
> "cat /sys/kernel/debug/kernel_hash_pagetable"
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/ptdump: Fix walk_vmemmap to also print first vmemmap entry
      https://git.kernel.org/powerpc/c/f318c8be797f8572629d5386a88cde7d753457a8

cheers