Commit 19b5ef61 authored by Theodore Ts'o's avatar Theodore Ts'o
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ext4: add mutex_is_locked() assertion to ext4_truncate() 



[ Added fixup from Lukáš Czerner which only checks the assertion when
  the inode is not new and is not being freed. ]

Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 819c4920

fs/ext4/inode.c

+7 −0
Original line number Diff line number Diff line
@@ -3788,6 +3788,13 @@ void ext4_truncate(struct inode *inode) 
	struct address_space *mapping = inode->i_mapping;

	loff_t page_len;



	/*

	 * There is a possibility that we're either freeing the inode

	 * or it completely new indode. In those cases we might not

	 * have i_mutex locked because it's not necessary.

	 */

	if (!(inode->i_state & (I_NEW|I_FREEING)))

		WARN_ON(!mutex_is_locked(&inode->i_mutex));

	trace_ext4_truncate_enter(inode);



	if (!ext4_can_truncate(inode))