mm: Fix comments mentioning i_mutex

inode->i_mutex has been replaced with inode->i_rwsem long ago. Fix
comments still mentioning i_mutex.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 10 insertions, 10 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index 70d9ce294bb4..9af4b2173fe9 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -96,7 +96,7 @@ static struct vfsmount *shm_mnt;
 
 /*
  * shmem_fallocate communicates with shmem_fault or shmem_writepage via
- * inode->i_private (with i_mutex making sure that it has only one user at
+ * inode->i_private (with i_rwsem making sure that it has only one user at
  * a time): we would prefer not to enlarge the shmem inode just for that.
  */
 struct shmem_falloc {
@@ -774,7 +774,7 @@ static int shmem_free_swap(struct address_space *mapping,
  * Determine (in bytes) how many of the shmem object's pages mapped by the
  * given offsets are swapped out.
  *
- * This is safe to call without i_mutex or the i_pages lock thanks to RCU,
+ * This is safe to call without i_rwsem or the i_pages lock thanks to RCU,
  * as long as the inode doesn't go away and racy results are not a problem.
  */
 unsigned long shmem_partial_swap_usage(struct address_space *mapping,
@@ -806,7 +806,7 @@ unsigned long shmem_partial_swap_usage(struct address_space *mapping,
  * Determine (in bytes) how many of the shmem object's pages mapped by the
  * given vma is swapped out.
  *
- * This is safe to call without i_mutex or the i_pages lock thanks to RCU,
+ * This is safe to call without i_rwsem or the i_pages lock thanks to RCU,
  * as long as the inode doesn't go away and racy results are not a problem.
  */
 unsigned long shmem_swap_usage(struct vm_area_struct *vma)
@@ -1069,7 +1069,7 @@ static int shmem_setattr(struct user_namespace *mnt_userns,
 		loff_t oldsize = inode->i_size;
 		loff_t newsize = attr->ia_size;
 
-		/* 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;
@@ -2071,7 +2071,7 @@ static vm_fault_t shmem_fault(struct vm_fault *vmf)
 	/*
 	 * Trinity finds that probing a hole which tmpfs is punching can
 	 * prevent the hole-punch from ever completing: which in turn
-	 * locks writers out with its hold on i_mutex.  So refrain from
+	 * locks writers out with its hold on i_rwsem.  So refrain from
 	 * faulting pages into the hole while it's being punched.  Although
 	 * shmem_undo_range() does remove the additions, it may be unable to
 	 * keep up, as each new page needs its own unmap_mapping_range() call,
@@ -2082,7 +2082,7 @@ static vm_fault_t shmem_fault(struct vm_fault *vmf)
 	 * we just need to make racing faults a rare case.
 	 *
 	 * The implementation below would be much simpler if we just used a
-	 * standard mutex or completion: but we cannot take i_mutex in fault,
+	 * standard mutex or completion: but we cannot take i_rwsem in fault,
 	 * and bloating every shmem inode for this unlikely case would be sad.
 	 */
 	if (unlikely(inode->i_private)) {
@@ -2482,7 +2482,7 @@ shmem_write_begin(struct file *file, struct address_space *mapping,
 	struct shmem_inode_info *info = SHMEM_I(inode);
 	pgoff_t index = pos >> PAGE_SHIFT;
 
-	/* i_mutex is held by caller */
+	/* i_rwsem is held by caller */
 	if (unlikely(info->seals & (F_SEAL_GROW |
 				   F_SEAL_WRITE | F_SEAL_FUTURE_WRITE))) {
 		if (info->seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE))
@@ -2582,7 +2582,7 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 
 		/*
 		 * We must evaluate after, since reads (unlike writes)
-		 * are called without i_mutex protection against truncate
+		 * are called without i_rwsem protection against truncate
 		 */
 		nr = PAGE_SIZE;
 		i_size = i_size_read(inode);
@@ -2652,7 +2652,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
 		return -ENXIO;
 
 	inode_lock(inode);
-	/* We're holding i_mutex so we can access i_size directly */
+	/* We're holding i_rwsem so we can access i_size directly */
 	offset = mapping_seek_hole_data(mapping, offset, inode->i_size, whence);
 	if (offset >= 0)
 		offset = vfs_setpos(file, offset, MAX_LFS_FILESIZE);
@@ -2681,7 +2681,7 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 		loff_t unmap_end = round_down(offset + len, PAGE_SIZE) - 1;
 		DECLARE_WAIT_QUEUE_HEAD_ONSTACK(shmem_falloc_waitq);
 
-		/* protected by i_mutex */
+		/* protected by i_rwsem */
 		if (info->seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE)) {
 			error = -EPERM;
 			goto out;