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aa3398fb4b
- More DT meta-schema check fixes from new bindings in merge window - Fix stale DT binding references from Mauro - Update various binding maintainers - Fix in arm,malidp properties to match reality - Add deprecated 'atheros' vendor prefix -----BEGIN PGP SIGNATURE----- iQJEBAABCgAuFiEEktVUI4SxYhzZyEuo+vtdtY28YcMFAmKjj4oQHHJvYmhAa2Vy bmVsLm9yZwAKCRD6+121jbxhwz85EACy/7Qvrv3BCJYW12lsWxzm69DXjMx/aXSO JJRN8hPOMGVb2S1278Hz8JpiRt+CjMyOLFMDgmuztieRd6DoHHVn5YU89T/8kkdv uzL1aT7R3X7Wwcs1OIIkPDikhtCsi74HPF6wp1mdxnXkfMj1sAd6ZGLoIpQc14qa Az6fwljlqj6sksDokSxjRvLtNT7Ncw6h8hYW2ALlDGeeMupbkOnA7M1OGYOsKiIS N6jf00dYTDgHcWzr7JJxb9ykSTHgzEy7ohkXAalSSkHp2Gl1wCuBJr7KnL+F59mg Z4Jp9XsU+KsqEOuSWmO2wOdfH8f8hlecU/zu1hq4uVwDv7VuugNdf4Ccqqe62Hje Qek4SXl4ChV+O9cVs09ww/yC2lfTJlES7R99oGL24Rx8ExpPRDXLrA6LVPhydHWf SK9vVcEEHeORM/in9Y8VKYlzoAG/eDPdd8ovunG9focwMizTFhU3vxhsdzcz4aGK VpEfKVDot/dNDxrC/CikyUldiY8GOONb+L+adux4kj0Y5Fz4W6w9YnRqha3DYtnr rXkUOW5v78dOFL6XQdtTW4rwJSHXUkMcYO7pxWvgY0e128qEV8+G6BxzSG0ihEET qcJ34C6wgPYdowP/tTIlOOFBOiPliMiAzrMLy6JFghGgnagNmK58kuTGfRoYdDDq VFlIkstHZw== =bYOd -----END PGP SIGNATURE----- Merge tag 'devicetree-fixes-for-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull more devicetree fixes from Rob Herring: - More DT meta-schema check fixes from new bindings in merge window - Fix stale DT binding references from Mauro - Update various binding maintainers - Fix in arm,malidp properties to match reality - Add deprecated 'atheros' vendor prefix * tag 'devicetree-fixes-for-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: dt-bindings: display: arm,malidp: remove bogus RQOS property dt-bindings: pinctrl: ralink: Fix 'enum' lists with duplicate entries dt-bindings: Drop more redundant 'maxItems/minItems' in if/then schemas dt-bindings: nvme: apple,nvme-ans: Drop 'maxItems' from 'apple,sart' MAINTAINERS: rectify entries for ARM DRM DRIVERS after dt conversion MAINTAINERS: update snps,axs10x-reset.yaml reference MAINTAINERS: update dongwoon,dw9807-vcm.yaml reference MAINTAINERS: update cortina,gemini-ethernet.yaml reference dt-bindings: mfd: rk808: update rockchip,rk808.yaml reference dt-bindings: reset: update st,stih407-powerdown.yaml references dt-bindings: arm: update vexpress-config.yaml references dt-bindings: interrupt-controller: update brcm,l2-intc.yaml reference dt-bindings: mfd: bd9571mwv: update rohm,bd9571mwv.yaml reference dt-bindings: update Luca Ceresoli's e-mail address dt-bindings: msm: update maintainers list with proper id dt-bindings: vendor-prefixes: document deprecated Atheros dt-bindings: Update QCOM USB subsystem maintainer information |
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This directory attempts to document the ABI between the Linux kernel and userspace, and the relative stability of these interfaces. Due to the everchanging nature of Linux, and the differing maturity levels, these interfaces should be used by userspace programs in different ways. We have four different levels of ABI stability, as shown by the four different subdirectories in this location. Interfaces may change levels of stability according to the rules described below. The different levels of stability are: stable/ This directory documents the interfaces that the developer has defined to be stable. Userspace programs are free to use these interfaces with no restrictions, and backward compatibility for them will be guaranteed for at least 2 years. Most interfaces (like syscalls) are expected to never change and always be available. testing/ This directory documents interfaces that are felt to be stable, as the main development of this interface has been completed. The interface can be changed to add new features, but the current interface will not break by doing this, unless grave errors or security problems are found in them. Userspace programs can start to rely on these interfaces, but they must be aware of changes that can occur before these interfaces move to be marked stable. Programs that use these interfaces are strongly encouraged to add their name to the description of these interfaces, so that the kernel developers can easily notify them if any changes occur (see the description of the layout of the files below for details on how to do this.) obsolete/ This directory documents interfaces that are still remaining in the kernel, but are marked to be removed at some later point in time. The description of the interface will document the reason why it is obsolete and when it can be expected to be removed. removed/ This directory contains a list of the old interfaces that have been removed from the kernel. Every file in these directories will contain the following information: What: Short description of the interface Date: Date created KernelVersion: Kernel version this feature first showed up in. Contact: Primary contact for this interface (may be a mailing list) Description: Long description of the interface and how to use it. Users: All users of this interface who wish to be notified when it changes. This is very important for interfaces in the "testing" stage, so that kernel developers can work with userspace developers to ensure that things do not break in ways that are unacceptable. It is also important to get feedback for these interfaces to make sure they are working in a proper way and do not need to be changed further. Note: The fields should be use a simple notation, compatible with ReST markup. Also, the file **should not** have a top-level index, like:: === foo === How things move between levels: Interfaces in stable may move to obsolete, as long as the proper notification is given. Interfaces may be removed from obsolete and the kernel as long as the documented amount of time has gone by. Interfaces in the testing state can move to the stable state when the developers feel they are finished. They cannot be removed from the kernel tree without going through the obsolete state first. It's up to the developer to place their interfaces in the category they wish for it to start out in. Notable bits of non-ABI, which should not under any circumstances be considered stable: - Kconfig. Userspace should not rely on the presence or absence of any particular Kconfig symbol, in /proc/config.gz, in the copy of .config commonly installed to /boot, or in any invocation of the kernel build process. - Kernel-internal symbols. Do not rely on the presence, absence, location, or type of any kernel symbol, either in System.map files or the kernel binary itself. See Documentation/process/stable-api-nonsense.rst.