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9ffa18884c
Function glock_clear_object() checks if the specified glock is still pointing at the right object and clears the gl_object pointer. To handle the case of incompletely constructed inodes, glock_clear_object() also allows gl_object to be NULL. However, in the teardown case, when iget_failed() is called and the inode is removed from the inode hash, by the time we get to the glock_clear_object() calls in gfs2_put_super() and its helpers, we don't have exclusion against concurrent gfs2_inode_lookup() and gfs2_create_inode() calls, and the inode and iopen glocks may already be pointing at another inode, so the checks in glock_clear_object() are incorrect. To better handle this case, always completely disassociate an inode from its glocks before tearing it down. In addition, get rid of a duplicate glock_clear_object() call in gfs2_evict_inode(). That way, glock_clear_object() will only ever be called when the glock points at the current inode, and the NULL check in glock_clear_object() can be removed. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.