eb91e4d4db
This reverts commit 36e0f12bbfd3016f495904b35e41c5711707509f. The reverted commit adds a WARN to check against NULL entries in the mem_id_ht rhashtable. Any kernel path implementing the XDP (generic or driver) fast path is required to make a paired xdp_rxq_info_reg/xdp_rxq_info_unreg call for proper function. In addition, a driver using a different allocation scheme than the default MEM_TYPE_PAGE_SHARED is required to additionally call xdp_rxq_info_reg_mem_model. For MEM_TYPE_ZERO_COPY, an xdp_rxq_info_reg_mem_model call ensures that the mem_id_ht rhashtable has a properly inserted allocator id. If not, this would be a driver bug. A NULL pointer kernel OOPS is preferred to the WARN. Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.