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e6115c6f7a
This simplifies the macro and makes it easy to add the new seqprop's with 2 or more args. Plus this way we do not lose the type info, the (void*) type cast is no longer needed. And the latter reveals the problem: a lot of seqcount_t helpers pass the "const seqcount_t *s" argument to __seqprop_ptr(seqcount_t *s) but (before this patch) "(void *)(s)" masked the problem. So this patch changes __seqprop_ptr() and __seqprop_##lockname##_ptr() to accept the "const LOCKNAME *s" argument. This is not nice either, they need to drop the constness on return because these helpers are used by both the readers and writers, but at least it is clear what's going on. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Waiman Long <longman@redhat.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/r/20231012143227.GA16143@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.