aboutsummaryrefslogtreecommitdiffstats
path: root/mm/nommu.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/nommu.c')
-rw-r--r--mm/nommu.c14
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.
*/

Privacy Policy