mainlining shenanigans
2990c89d1d
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEqG5UsNXhtOCrfGQP+7dXa6fLC2sFAmGvhdUACgkQ+7dXa6fL C2t41A/+LETrO+UgaAOhikx5XIZbyZTuiiKWg4i63mBhhhn2593h3z0UjDx9XMEi XRPTHHhZ0u+uyWN8r2CkdfkrGx3AK/YBuR7s/N/7yQsXfiv1NrqFxU14gd6EK0YC hc7nBxLG/EsN913Jc+ttUjw2Lnnv+7A1JyFc4Rv8aS8SXcRPH5ADy7I8SCFet+nC JKoVapkTxLX57X+tiCsf+wnuY7b+mRJ7L5uR/f5uweQr2evQ37PCanenoxPi1wCM tvkHrmQ73Je4nPY0tuXgtQzMaozuyEEAdhCjgiyOR9EoeCldbVpzY+AWZkx2qog6 z0oU1hsWYEj/hFc3r4B7MxYziwUpwJHYssiiwjXm8lVUh2BJA9U97dnc3hQfJa8z Upg2nCv+/ObpMiX4l9HKDl6WHvMec/VpYPwbsSC5nMysWZrZos6rales9Ougb/eJ cl2vs8YLNm87rhHsFWCp5x2LkFRp9SlJkUWVybdl0M6+SWnB38ckqey3m+xhb3DQ brCCa+UyG2d6PGkRthl+iF7Zx86blZ4Rm8qD2rec5K1dNiVP3HunsRO5yq4mXuEK QM9m0C/hF8k/v7gD0kLI9h7fEiO7JF7+KelxUVoq57P8hcsnjsHQcfMapn+yP4o0 6Qda9FnLTXnNj/s9ChMAc9mFwdjSzjbqTfiqNK5BKdypjM/2YEc= =w/ll -----END PGP SIGNATURE----- Merge tag 'netfs-fixes-20211207' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs Pull netfslib fixes from David Howells: - Fix a lockdep warning and potential deadlock. This is takes the simple approach of offloading the write-to-cache done from within a network filesystem read to a worker thread to avoid taking the sb_writer lock from the cache backing filesystem whilst holding the mmap lock on an inode from the network filesystem. Jan Kara posits a scenario whereby this can cause deadlock[1], though it's quite complex and I think requires someone in userspace to actually do I/O on the cache files. Matthew Wilcox isn't so certain, though[2]. An alternative way to fix this, suggested by Darrick Wong, might be to allow cachefiles to prevent userspace from performing I/O upon the file - something like an exclusive open - but that's beyond the scope of a fix here if we do want to make such a facility in the future. - In some of the error handling paths where netfs_ops->cleanup() is called, the arguments are transposed[3]. gcc doesn't complain because one of the parameters is void* and one of the values is void*. Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/ [1] Link: https://lore.kernel.org/r/Ya9eDiFCE2fO7K/S@casper.infradead.org/ [2] Link: https://lore.kernel.org/r/20211207031449.100510-1-jefflexu@linux.alibaba.com/ [3] * tag 'netfs-fixes-20211207' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: netfs: fix parameter of cleanup() netfs: Fix lockdep warning from taking sb_writers whilst holding mmap_lock |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.