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26ccd2d376
Add a platform clocksource by adapting the existing arch_gettimeoffset implementation. Normally the MFP timer C interrupt flag would be used to check for timer counter wrap-around. Unfortunately, that flag gets cleared by the MFP itself (due to automatic End-of-Interrupt mode). This means that mfp_timer_c_handler() and atari_read_clk() must race when accounting for counter wrap-around. That problem is avoided by effectively stopping the clock when it might otherwise jump backwards (due to interrupt latency). Note that this may affect clock accuracy. After the timer interrupt is asserted, wait for the counter to be reloaded so that atari_read_clk() will not see the intermediate state as that would cause the clock to jump backwards. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
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| COPYING | ||
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| Makefile | ||
| README | ||
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.