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SubjectRe: [PATCH] hugetlbfs: Take read_lock on i_mmap for PMD sharing
On Thu, Nov 07, 2019 at 02:06:28PM -0500, Waiman Long wrote:
> - i_mmap_lock_write(mapping);
> + /*
> + * PMD sharing does not require changes to i_mmap. So a read lock
> + * is enuogh.
> + */
> + i_mmap_lock_read(mapping);

We don't have comments before any of the other calls to i_mmap_lock_read()
justifying why we don't need the write lock. I don't understand why this
situation is different. Just delete the comment and make this a two-line
patch.

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