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.
Yonghong Song
authored
Commit d83525ca ("bpf: introduce bpf_spin_lock") introduced bpf_spin_lock and the field spin_lock_off in kernel internal structure bpf_map has the following meaning: >=0 valid offset, <0 error For every map created, the kernel will ensure spin_lock_off has correct value. Currently, bpf_map->spin_lock_off is not copied from the inner map to the map_in_map inner_map_meta during a map_in_map type map creation, so inner_map_meta->spin_lock_off = 0. This will give verifier wrong information that inner_map has bpf_spin_lock and the bpf_spin_lock is defined at offset 0. An access to offset 0 of a value pointer will trigger the following error: bpf_spin_lock cannot be accessed directly by load/store This patch fixed the issue by copy inner map's spin_lock_off value to inner_map_meta->spin_lock_off. Fixes: d83525ca ("bpf: introduce bpf_spin_lock") Signed-off-by:Yonghong Song <yhs@fb.com> Acked-by:
Andrii Nakryiko <andriin@fb.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org>
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| firmware | ||
| fs | ||
| include | ||
| init | ||
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| kernel | ||
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| samples | ||
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| .cocciconfig | ||
| .get_maintainer.ignore | ||
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| .mailmap | ||
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| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README |