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@xxxxxxxxxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
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) &&
--
2.47.1
