Messages in this thread Patch in this message | | | From | Laurent Dufour <> | Subject | [RFC 3/4] Remove nest locking operation with mmap_sem | Date | Wed, 19 Apr 2017 14:18:26 +0200 |
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The range locking framework doesn't yet provide nest locking operation, so remove them assuming that the check is now good.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> --- mm/mmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c index cd8fa7e74784..4df13e633e92 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3284,7 +3284,7 @@ static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma) * The LSB of head.next can't change from under us * because we hold the mm_all_locks_mutex. */ - down_write_nest_lock(&anon_vma->root->rwsem, &mm->mmap_sem); + down_write(&anon_vma->root->rwsem); /* * We can safely modify head.next after taking the * anon_vma->root->rwsem. If some other vma in this mm shares @@ -3314,7 +3314,7 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping) */ if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags)) BUG(); - down_write_nest_lock(&mapping->i_mmap_rwsem, &mm->mmap_sem); + down_write(&mapping->i_mmap_rwsem); } } -- 2.7.4
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