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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-20 16:24:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-21 08:49:21 -0700
commit297c5eee372478fc32fec5fe8eed711eedb13f3d (patch)
tree18415eae0833ff4767943f985900524d6b1d73f1 /include
parent36423a5ed5e4ea95ceedb68fad52965033e11639 (diff)
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op-kernel-dev-297c5eee372478fc32fec5fe8eed711eedb13f3d.tar.gz
mm: make the vma list be doubly linked
It's a really simple list, and several of the users want to go backwards in it to find the previous vma. So rather than have to look up the previous entry with 'find_vma_prev()' or something similar, just make it doubly linked instead. Tested-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm_types.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index b8bb9a6..ee7e258 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -134,7 +134,7 @@ struct vm_area_struct {
within vm_mm. */
/* linked list of VM areas per task, sorted by address */
- struct vm_area_struct *vm_next;
+ struct vm_area_struct *vm_next, *vm_prev;
pgprot_t vm_page_prot; /* Access permissions of this VMA. */
unsigned long vm_flags; /* Flags, see mm.h. */
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