Add resolve_btfids support for __arena kfunc suffix - #8669
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Add resolve_btfids support for __arena kfunc suffix#8669kernel-patches-daemon-bpf-rc[bot] wants to merge 2 commits into
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Kfunc declarations can identify arena arguments through parameter name suffixes without repeating KF_ARENA_ARG flags in their BTF ID sets. resolve_btfids currently misses those arguments when synthesizing the address_space(1) attributes used by generated vmlinux.h files. Teach the arena prototype rewrite to recognize __arena and __arena__nullable directly on each parameter. Keep KF_ARENA_ARG1 and KF_ARENA_ARG2 handling for explicitly flagged kfuncs, while allowing suffixes on any argument without synthesizing kfunc flags. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Add a suffix-only kfunc declaration with arena annotations on all five arguments. Verify that resolve_btfids emits address_space(1) type tags for every position without KF_ARENA_ARG flags in the BTF ID sets. Represent expected arena arguments as a per-parameter bitmap so the test covers suffixes beyond the two positions expressible by flags. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
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Upstream branch: d114bb9 |
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Pull request for series with
subject: Add resolve_btfids support for __arena kfunc suffix
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1142858