mm: don't drop VMA locks in mm_drop_all_locks()

[linux-2.6-microblaze.git] / include / linux / mmap_lock.h

diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index a5c63b6..8d38dcb 100644 (file)
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -73,6 +73,14 @@ static inline void mmap_assert_write_locked(struct mm_struct *mm)
 }
 
 #ifdef CONFIG_PER_VMA_LOCK
+/*
+ * Drop all currently-held per-VMA locks.
+ * This is called from the mmap_lock implementation directly before releasing
+ * a write-locked mmap_lock (or downgrading it to read-locked).
+ * This should normally NOT be called manually from other places.
+ * If you want to call this manually anyway, keep in mind that this will release
+ * *all* VMA write locks, including ones from further up the stack.
+ */
 static inline void vma_end_write_all(struct mm_struct *mm)
 {
        mmap_assert_write_locked(mm);