7100b1e1f5
It seems that some drivers (e.g. broadcom43xx) create a parent DMA tag with nsegments set to BUS_SPACE_UNRESTRICTED, i.e. MAX_INT, which of course fails allocation, expecting to never allocate memory for this tag, only for child tags. So in order to handle this, we have to delay allocating the segment array until we are certain that the nsegments value is the "real deal". Doing it in dmamap_load would be fine, but as there is more than one entry point to that, we would have to allocate this in multiple places. dmamap_create() must be called and there is only one way through it, so put the allocation there. Fixes #15500 (i.e. both the KDL and the underlying problem that led to it; it only crashed because the wrong pointer was passed to kernel_free, whoops.)
Haiku
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Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
Goals
- Sensible defaults with minimal configuration required.
- Clean, clear, concise code.
- Unified desktop environment.
Trying Haiku
Haiku provides pre-built nightly images and release images. Haiku is compatible with a large variety of hardware, but in case you don't want to "take the plunge" and install Haiku on bare metal, you can install it on a virtual machine (VM) instead. If you've never used a VM before, you can follow one of the "Emulating Haiku" guides.
Compiling Haiku
See ReadMe.Compiling.
Contributing
Haiku is a meritocratic open source project with a large variety of tasks. Even if you can't write code, you can still help! Haiku needs designers, (technical) writers, translators, testers... Get involved and help out!
Contributing code
If you're submitting a patch to us, please make sure you're following the patch submitting guidelines.
If you're having trouble finding something in the source tree, you can use one of our web-based source code browsers:
- http://xref.plausible.coop/ (OpenGrok, provided by Landon Fuller)
- http://cgit.haiku-os.org/ (cgit, provided by Haiku, Inc.)
Contributing documentation
The main piece of documentation that still needs work are the API docs (found
in the tree at docs/user). Just find an undocumented class, write
documentation for it, and submit a patch.
Contributing translations
See wiki:i18n.
Contributing software ports
See HaikuPorts.
Contributing to our infrastructure
See Infrastructure.