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d31e23aff0
Rework the vmalloc_seq handling so it can be used safely under SMP, as we started using it to ensure that vmap'ed stacks are guaranteed to be mapped by the active mm before switching to a task, and here we need to ensure that changes to the page tables are visible to other CPUs when they observe a change in the sequence count. Since LPAE needs none of this, fold a check against it into the vmalloc_seq counter check after breaking it out into a separate static inline helper. Given that vmap'ed stacks are now also supported on !SMP configurations, let's drop the WARN() that could potentially now fire spuriously. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| 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.