hugetlbfs: correct some obsolete comments about inode i_mutex

Since commit 9902af79c01a ("parallel lookups: actual switch to rwsem"),
i_mutex of inode is converted to i_rwsem. So replace i_mutex with i_rwsem
to make comments up to date.

Link: https://lkml.kernel.org/r/20210127093111.36672-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 46fad3d..f5758ba 100644 (file)
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -604,7 +604,7 @@ static long hugetlbfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 
                inode_lock(inode);
 
-               /* protected by i_mutex */
+               /* protected by i_rwsem */
                if (info->seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE)) {
                        inode_unlock(inode);
                        return -EPERM;
@@ -777,7 +777,7 @@ static int hugetlbfs_setattr(struct user_namespace *mnt_userns,
 
                if (newsize & ~huge_page_mask(h))
                        return -EINVAL;
-               /* protected by i_mutex */
+               /* protected by i_rwsem */
                if ((newsize < oldsize && (info->seals & F_SEAL_SHRINK)) ||
                    (newsize > oldsize && (info->seals & F_SEAL_GROW)))
                        return -EPERM;