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49bdbdb11f
These flags serve essentially the same purpose and get set and cleared at the same time. Drop CB_GETATTR_BUSY and just use NFSD4_CALLBACK_RUNNING instead. For this to work, we must use clear_and_wake_up_bit(), but doing that on for other types of callbacks is wasteful. Declare a new NFSD4_CALLBACK_WAKE flag in cb_flags to indicate that wake_up is needed, and only set that for CB_GETATTRs. Also, make the wait use a TASK_UNINTERRUPTIBLE sleep. This is done in the context of an nfsd thread, and it should never need to deal with signals. Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.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 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.