diff options
| -rw-r--r-- | mm/nommu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index a6e8ccfbd400..60ed8375c986 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -149,6 +149,20 @@ unsigned int kobjsize(const void *objp) return ksize(objp); /* + * If it's not a compound page, see if we have a matching VMA + * region. This test is intentionally done in reverse order, + * so if there's no VMA, we still fall through and hand back + * PAGE_SIZE for 0-order pages. + */ + if (!PageCompound(page)) { + struct vm_area_struct *vma; + + vma = find_vma(current->mm, (unsigned long)objp); + if (vma) + return vma->vm_end - vma->vm_start; + } + + /* * The ksize() function is only guaranteed to work for pointers * returned by kmalloc(). So handle arbitrary pointers here. */ |