lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

mm: rename drop_anon_vma() to put_anon_vma()

Browse Source 
The normal code pattern used in the kernel is: get/put.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra
2011-03-22 16:32:46 -07:00
committed by Linus Torvalds
parent 7bc32f6f90
commit 9e60109f12
4 changed files with 11 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
mm/ksm.c
View File

@ -301,20 +301,6 @@ static inline int in_stable_tree(struct rmap_item *rmap_item)
return rmap_item->address & STABLE_FLAG;
}
static void hold_anon_vma(struct rmap_item *rmap_item,
struct anon_vma *anon_vma)
{
rmap_item->anon_vma = anon_vma;
get_anon_vma(anon_vma);
}
static void ksm_drop_anon_vma(struct rmap_item *rmap_item)
{
struct anon_vma *anon_vma = rmap_item->anon_vma;
drop_anon_vma(anon_vma);
}
/*
* ksmd, and unmerge_and_remove_all_rmap_items(), must not touch an mm's
* page tables after it has passed through ksm_exit() - which, if necessary,
@ -397,7 +383,7 @@ static void break_cow(struct rmap_item *rmap_item)
* It is not an accident that whenever we want to break COW
* to undo, we also need to drop a reference to the anon_vma.
*/
ksm_drop_anon_vma(rmap_item);
put_anon_vma(rmap_item->anon_vma);
down_read(&mm->mmap_sem);
if (ksm_test_exit(mm))
@ -466,7 +452,7 @@ static void remove_node_from_stable_tree(struct stable_node *stable_node)
ksm_pages_sharing--;
else
ksm_pages_shared--;
ksm_drop_anon_vma(rmap_item);
put_anon_vma(rmap_item->anon_vma);
rmap_item->address &= PAGE_MASK;
cond_resched();
}
@ -554,7 +540,7 @@ static void remove_rmap_item_from_tree(struct rmap_item *rmap_item)
else
ksm_pages_shared--;
ksm_drop_anon_vma(rmap_item);
put_anon_vma(rmap_item->anon_vma);
rmap_item->address &= PAGE_MASK;
} else if (rmap_item->address & UNSTABLE_FLAG) {
@ -949,7 +935,8 @@ static int try_to_merge_with_ksm_page(struct rmap_item *rmap_item,
goto out;
/* Must get reference to anon_vma while still holding mmap_sem */
hold_anon_vma(rmap_item, vma->anon_vma);
rmap_item->anon_vma = vma->anon_vma;
get_anon_vma(vma->anon_vma);
out:
up_read(&mm->mmap_sem);
return err;