311150343e
All other instances of gup_huge_pXd() perform the unshare check, so update the PGD-specific function to do so as well. While checking pgd_write() might seem unusual, this function already performs such a check via pgd_access_permitted() so this is in line with the existing implementation. David said: : This change makes unshare handling across all GUP-fast variants : consistent, which is desirable as GUP-fast is complicated enough : already even when consistent. : : This function was the only one I seemed to have missed (or left out and : forgot why -- maybe because it's really dead code for now). The COW : selftest would identify the problem, so far there was no report. : Either the selftest wasn't run on corresponding architectures with that : hugetlb size, or that code is still dead code and unused by : architectures. : : the original commit(s) that added unsharing explain why we care about : these checks: : : |
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|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| 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.