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There are two implementation of spinlock in arch/csky: - simple one (NR_CPU = 1,2) - tick's one (NR_CPU = 3,4) Remove the simple one. There is already smp_mb in spinlock, so remove the definition of smp_mb__after_spinlock. Link: https://lore.kernel.org/linux-csky/20200807081253.GD2674@hirez.programming.kicks-ass.net/#t Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Peter Zijlstra <peterz@infradead.org>k Cc: Arnd Bergmann <arnd@arndb.de>
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.