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1f5dfcc78a
This reverts commit 0243d3dfe2.
pahole 1.25 is too aggressive removing functions.
With clang compiled kernel the following is seen:
WARN: resolve_btfids: unresolved symbol tcp_reno_cong_avoid
WARN: resolve_btfids: unresolved symbol dctcp_update_alpha
WARN: resolve_btfids: unresolved symbol cubictcp_cong_avoid
WARN: resolve_btfids: unresolved symbol bpf_xdp_metadata_rx_timestamp
WARN: resolve_btfids: unresolved symbol bpf_xdp_metadata_rx_hash
WARN: resolve_btfids: unresolved symbol bpf_task_kptr_get
WARN: resolve_btfids: unresolved symbol bpf_task_acquire_not_zero
WARN: resolve_btfids: unresolved symbol bpf_rdonly_cast
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_static_unused_arg
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_ref
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_pass_ctx
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_pass2
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_pass1
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_mem_len_pass1
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_mem_len_fail2
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_mem_len_fail1
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_kptr_get
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_fail3
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_fail2
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test_acquire
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test2
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_test1
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_memb_release
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_memb1_release
WARN: resolve_btfids: unresolved symbol bpf_kfunc_call_int_mem_release
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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.