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In commitb73ec10a45("fs: add fastpath for dissolve_on_fput()"), the namespace_{lock,unlock} has been replaced with scoped_guard using the namespace_sem. This however now also skips processing of 'unmounted' list in namespace_unlock(), and mount is not (immediately) cleaned up. For example, this causes LTP move_mount02 fail: ... move_mount02.c:80: TPASS: invalid-from-fd: move_mount() failed as expected: EBADF (9) move_mount02.c:80: TPASS: invalid-from-path: move_mount() failed as expected: ENOENT (2) move_mount02.c:80: TPASS: invalid-to-fd: move_mount() failed as expected: EBADF (9) move_mount02.c:80: TPASS: invalid-to-path: move_mount() failed as expected: ENOENT (2) move_mount02.c:80: TPASS: invalid-flags: move_mount() failed as expected: EINVAL (22) tst_test.c:1833: TINFO: === Testing on ext3 === tst_test.c:1170: TINFO: Formatting /dev/loop0 with ext3 opts='' extra opts='' mke2fs 1.47.2 (1-Jan-2025) /dev/loop0 is apparently in use by the system; will not make a filesystem here! tst_test.c:1170: TBROK: mkfs.ext3 failed with exit code 1 The test makes number of move_mount() calls but these are all designed to fail with specific errno. Even after test, 'losetup -d' can't detach loop device. Define a new guard for dissolve_on_fput, that will use namespace_{lock,unlock}. Fixes:b73ec10a45("fs: add fastpath for dissolve_on_fput()") Signed-off-by: Jan Stancek <jstancek@redhat.com> Link: https://lore.kernel.org/cad2f042b886bf0ced3d8e3aff120ec5e0125d61.1744297468.git.jstancek@redhat.com Signed-off-by: Christian Brauner <brauner@kernel.org>
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 reStructuredText 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.