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| Filename | Latest commit message | Latest commit date |
|---|---|---|
a0b0fd53e1
Instead of leaving lock classes that are no longer in use in the lock_classes array, reuse entries from that array that are no longer in use. Maintain a linked list of free lock classes with list head 'free_lock_class'. Only add freed lock classes to the free_lock_classes list after a grace period to avoid that a lock_classes[] element would be reused while an RCU reader is accessing it. Since the lockdep selftests run in a context where sleeping is not allowed and since the selftests require that lock resetting/zapping works with debug_locks off, make the behavior of lockdep_free_key_range() and lockdep_reset_lock() depend on whether or not these are called from the context of the lockdep selftests. Thanks to Peter for having shown how to modify get_pending_free() such that that function does not have to sleep. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <longman@redhat.com> Cc: Will Deacon <will.deacon@arm.com> Cc: johannes.berg@intel.com Cc: tj@kernel.org Link: https://lkml.kernel.org/r/20190214230058.196511-12-bvanassche@acm.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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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.