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mm: change direct call of spin_lock(anon_vma->lock) to inline function

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Subsitute a direct call of spin_lock(anon_vma->lock) with an inline
function doing exactly the same.

This makes it easier to do the substitution to the root anon_vma lock in a
following patch.

We will deal with the handful of special locks (nested, dec_and_lock, etc)
separately.

Signed-off-by: Rik van Riel <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Acked-by: KAMEZAWA Hiroyuki <[email protected]>
Tested-by: Larry Woodman <[email protected]>
Acked-by: Larry Woodman <[email protected]>
Reviewed-by: Minchan Kim <[email protected]>
Acked-by: Linus Torvalds <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Rik van Riel 2010-08-09 17:18:38 -07:00 • committed by Linus Torvalds
commit cba48b98f2
5 changed files with 31 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

18
mm/ksm.c
View file

@ -327,7 +327,7 @@ static void drop_anon_vma(struct rmap_item *rmap_item)
if (atomic_dec_and_lock(&anon_vma->external_refcount, &anon_vma->lock)) {
int empty = list_empty(&anon_vma->head);
spin_unlock(&anon_vma->lock);
anon_vma_unlock(anon_vma);
if (empty)
anon_vma_free(anon_vma);
}
@ -1566,7 +1566,7 @@ again:
struct anon_vma_chain *vmac;
struct vm_area_struct *vma;
spin_lock(&anon_vma->lock);
anon_vma_lock(anon_vma);
list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) {
vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
@ -1589,7 +1589,7 @@ again:
if (!search_new_forks || !mapcount)
break;
}
spin_unlock(&anon_vma->lock);
anon_vma_unlock(anon_vma);
if (!mapcount)
goto out;
}
@ -1619,7 +1619,7 @@ again:
struct anon_vma_chain *vmac;
struct vm_area_struct *vma;
spin_lock(&anon_vma->lock);
anon_vma_lock(anon_vma);
list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) {
vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
@ -1637,11 +1637,11 @@ again:
ret = try_to_unmap_one(page, vma,
rmap_item->address, flags);
if (ret != SWAP_AGAIN || !page_mapped(page)) {
spin_unlock(&anon_vma->lock);
anon_vma_unlock(anon_vma);
goto out;
}
}
spin_unlock(&anon_vma->lock);
anon_vma_unlock(anon_vma);
}
if (!search_new_forks++)
goto again;
@ -1671,7 +1671,7 @@ again:
struct anon_vma_chain *vmac;
struct vm_area_struct *vma;
spin_lock(&anon_vma->lock);
anon_vma_lock(anon_vma);
list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) {
vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
@ -1688,11 +1688,11 @@ again:
ret = rmap_one(page, vma, rmap_item->address, arg);
if (ret != SWAP_AGAIN) {
spin_unlock(&anon_vma->lock);
anon_vma_unlock(anon_vma);
goto out;
}
}
spin_unlock(&anon_vma->lock);
anon_vma_unlock(anon_vma);
}
if (!search_new_forks++)
goto again;