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rds_page_remainder_alloc() obtains the current CPU with get_cpu() while disabling preemption. Then the CPU number is used to access the per-CPU data structure via per_cpu(). This can be optimized by relying on local_bh_disable() to provide a stable CPU number/ avoid migration and then using this_cpu_ptr() to retrieve the data structure. Cc: Allison Henderson <allison.henderson@oracle.com> Cc: linux-rdma@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://patch.msgid.link/20250512092736.229935-15-bigeasy@linutronix.de Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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.