diff options
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 51d04c1847c1..1fc4b9c2c8a6 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -144,6 +144,10 @@ struct page { struct { /* Page table pages */ unsigned long _pt_pad_1; /* compound_head */ pgtable_t pmd_huge_pte; /* protected by page->ptl */ + /* + * A PTE page table page might be freed by use of + * rcu_head: which overlays those two fields above. + */ unsigned long _pt_pad_2; /* mapping */ union { struct mm_struct *pt_mm; /* x86 pgds only */ |