[0/2] page_owner: Fixup and cleanup

Message

Oscar Salvador March 6, 2024, 12:32 p.m. UTC

Hi,

this patchset consists of a fixup by an error that was reported by intel
robot, where it seems to be that by the time page_owner gets
initialized, stackdepot has already depleted its allocation space and
returns 0-handles, turning that into null stack_records when trying
to retrieve the stack_record.
I was not able to reproduce that from the config because it booted fine
for me, but when setting e.g: dummy_handle to 0 artificially,
I could see the same error that was reported.

The second patch is a cleanup that can also lead to a compilation
warning.

Oscar Salvador (2):
  mm,page_owner: Check for null stack_record before bumping its refcount
  mm,page_owner: Drop unnecesary check

 mm/page_owner.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)