On Tue, Oct 26, 2021 at 6:06 PM Mike Kravetz [off-list ref] wrote:

In commit 7118fc2906e29 ("hugetlb: address ref count racing in
prep_compound_gigantic_page"), page_ref_freeze is used to atomically
zero the ref count of tail pages iff they are 1.  The unconditional
call to set_page_count(0) was left in the code.  This call is after
page_ref_freeze so it is really a noop.

Remove redundant and unnecessary set_page_count call.

Fixes: 7118fc2906e29 ("hugetlb: address ref count racing in prep_compound_gigantic_page")
Suggested-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Mike Kravetz <redacted>

Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>

Thanks,
Pasha