mm: Remove BUG_ON mmap_sem not held from xxx_trans_huge_lock()

The caller needs to make sure that the vma is not torn down during the
lock operation and can also use the i_mmap_rwsem for file-backed vmas.
Remove the BUG_ON. We could, as an alternative, add a test that either
vma->vm_mm->mmap_sem or vma->vm_file->f_mapping->i_mmap_rwsem are held.

Cc: Andrew Morton <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Huang Ying <[email protected]>
Cc: Jérôme Glisse <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Signed-off-by: Thomas Hellstrom <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>

0 files changed, 0 insertions, 0 deletions