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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-11 09:30:25 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-11 09:30:25 +0200
commit454ed842d55740160334efc9ad56cfef54ed37bc (patch)
tree1b60057a0dc7d65c530b6b1ad4514200f828ac9a
parentb7d39aff91454f2534db2275f55908656ec0470c (diff)
lockdep: annotate mm_take_all_locks()
The nesting is correct due to holding mmap_sem, use the new annotation to annotate this. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--mm/mmap.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 245c3d69067..5d09d08a412 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2273,14 +2273,14 @@ int install_special_mapping(struct mm_struct *mm,
static DEFINE_MUTEX(mm_all_locks_mutex);
-static void vm_lock_anon_vma(struct anon_vma *anon_vma)
+static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma)
{
if (!test_bit(0, (unsigned long *) &anon_vma->head.next)) {
/*
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
*/
- spin_lock(&anon_vma->lock);
+ spin_lock_nest_lock(&anon_vma->lock, &mm->mmap_sem);
/*
* We can safely modify head.next after taking the
* anon_vma->lock. If some other vma in this mm shares
@@ -2296,7 +2296,7 @@ static void vm_lock_anon_vma(struct anon_vma *anon_vma)
}
}
-static void vm_lock_mapping(struct address_space *mapping)
+static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping)
{
if (!test_bit(AS_MM_ALL_LOCKS, &mapping->flags)) {
/*
@@ -2310,7 +2310,7 @@ static void vm_lock_mapping(struct address_space *mapping)
*/
if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags))
BUG();
- spin_lock(&mapping->i_mmap_lock);
+ spin_lock_nest_lock(&mapping->i_mmap_lock, &mm->mmap_sem);
}
}
@@ -2359,9 +2359,9 @@ int mm_take_all_locks(struct mm_struct *mm)
if (signal_pending(current))
goto out_unlock;
if (vma->anon_vma)
- vm_lock_anon_vma(vma->anon_vma);
+ vm_lock_anon_vma(mm, vma->anon_vma);
if (vma->vm_file && vma->vm_file->f_mapping)
- vm_lock_mapping(vma->vm_file->f_mapping);
+ vm_lock_mapping(mm, vma->vm_file->f_mapping);
}
ret = 0;