mm: change direct call of spin_lock(anon_vma->lock) to inline function
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 <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: Larry Woodman <lwoodman@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 80cd162..5f981be 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -113,6 +113,16 @@
spin_unlock(&anon_vma->lock);
}
+static inline void anon_vma_lock(struct anon_vma *anon_vma)
+{
+ spin_lock(&anon_vma->lock);
+}
+
+static inline void anon_vma_unlock(struct anon_vma *anon_vma)
+{
+ spin_unlock(&anon_vma->lock);
+}
+
/*
* anon_vma helper functions.
*/
diff --git a/mm/ksm.c b/mm/ksm.c
index 6c3e99b..eb9f680 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -327,7 +327,7 @@
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 @@
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 @@
if (!search_new_forks || !mapcount)
break;
}
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
if (!mapcount)
goto out;
}
@@ -1619,7 +1619,7 @@
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 @@
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 @@
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 @@
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;
diff --git a/mm/migrate.c b/mm/migrate.c
index 4205b1d..1855f86 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -684,7 +684,7 @@
/* Drop an anon_vma reference if we took one */
if (anon_vma && 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);
}
diff --git a/mm/mmap.c b/mm/mmap.c
index e26f1ea..f5db18de 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2593,7 +2593,7 @@
if (!__test_and_clear_bit(0, (unsigned long *)
&anon_vma->head.next))
BUG();
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
}
}
diff --git a/mm/rmap.c b/mm/rmap.c
index 38a336e..b65f00d 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -134,7 +134,7 @@
allocated = anon_vma;
}
- spin_lock(&anon_vma->lock);
+ anon_vma_lock(anon_vma);
/* page_table_lock to protect against threads */
spin_lock(&mm->page_table_lock);
if (likely(!vma->anon_vma)) {
@@ -147,7 +147,7 @@
avc = NULL;
}
spin_unlock(&mm->page_table_lock);
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
if (unlikely(allocated))
anon_vma_free(allocated);
@@ -170,9 +170,9 @@
avc->anon_vma = anon_vma;
list_add(&avc->same_vma, &vma->anon_vma_chain);
- spin_lock(&anon_vma->lock);
+ anon_vma_lock(anon_vma);
list_add_tail(&avc->same_anon_vma, &anon_vma->head);
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
}
/*
@@ -246,12 +246,12 @@
if (!anon_vma)
return;
- spin_lock(&anon_vma->lock);
+ anon_vma_lock(anon_vma);
list_del(&anon_vma_chain->same_anon_vma);
/* We must garbage collect the anon_vma if it's empty */
empty = list_empty(&anon_vma->head) && !anonvma_external_refcount(anon_vma);
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
if (empty)
anon_vma_free(anon_vma);
@@ -302,7 +302,7 @@
goto out;
anon_vma = (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON);
- spin_lock(&anon_vma->lock);
+ anon_vma_lock(anon_vma);
return anon_vma;
out:
rcu_read_unlock();
@@ -311,7 +311,7 @@
void page_unlock_anon_vma(struct anon_vma *anon_vma)
{
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
rcu_read_unlock();
}
@@ -1389,7 +1389,7 @@
anon_vma = page_anon_vma(page);
if (!anon_vma)
return ret;
- spin_lock(&anon_vma->lock);
+ anon_vma_lock(anon_vma);
list_for_each_entry(avc, &anon_vma->head, same_anon_vma) {
struct vm_area_struct *vma = avc->vma;
unsigned long address = vma_address(page, vma);
@@ -1399,7 +1399,7 @@
if (ret != SWAP_AGAIN)
break;
}
- spin_unlock(&anon_vma->lock);
+ anon_vma_unlock(anon_vma);
return ret;
}
