bb2ef9b92b
This hardware can provide only 48 bits of cycle counter. We can leave only 24 bits in the cache to extend RX timestamps from 32 bits to 48 bits. Lower 8 bits of the cached value will be used to check for roll-over while extending to full 48 bits. This change makes cache writes atomic even on 32 bit platforms and we can simply use READ_ONCE()/WRITE_ONCE() pair and remove spinlock. The configuration structure will be also reduced by 4 bytes. Reviewed-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: Vadim Fedorenko <vadfed@meta.com> Link: https://patch.msgid.link/20241103215108.557531-1-vadfed@meta.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.