Entries (including flags) are u64, even on 32bit. So right now we are cutting of the flags on 32bit. This way, for example the cow selftest complains about:

# ./cow ... Bail Out! read and ioctl return unmatched results for populated: 0 1

Fixes: 2c1f057e5be6 ("fs/proc/task_mmu: properly detect PM_MMAP_EXCLUSIVE per page of PMD-mapped THPs") Cc: Andrew Morton akpm@linux-foundation.org Cc: Oscar Salvador osalvador@suse.de Cc: stable@vger.kernel.org Signed-off-by: David Hildenbrand david@redhat.com --- fs/proc/task_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 38a5a3e9cba20..f02cd362309a0 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1810,7 +1810,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end, }

for (; addr != end; addr += PAGE_SIZE, idx++) { - unsigned long cur_flags = flags; + u64 cur_flags = flags; pagemap_entry_t pme;

if (folio && (flags & PM_PRESENT) &&