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bacc15e010
The module does not do anything when the JIT is disabled, but instead
causes a warning:
In file included from include/linux/bpf_verifier.h:7,
from drivers/hid/bpf/hid_bpf_struct_ops.c:10:
drivers/hid/bpf/hid_bpf_struct_ops.c: In function 'hid_bpf_struct_ops_init':
include/linux/bpf.h:1853:50: error: statement with no effect [-Werror=unused-value]
1853 | #define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })
| ^~~~~~~~~~~~~~~~
drivers/hid/bpf/hid_bpf_struct_ops.c:305:16: note: in expansion of macro 'register_bpf_struct_ops'
305 | return register_bpf_struct_ops(&bpf_hid_bpf_ops, hid_bpf_ops);
| ^~~~~~~~~~~~~~~~~~~~~~~
Add a Kconfig dependency to only allow building the HID-BPF support
when a JIT is enabled.
Fixes: ebc0d8093e ("HID: bpf: implement HID-BPF through bpf_struct_ops")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/96a00b6f-eb81-4c67-8c4b-6b1f3f045034@app.fastmail.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
16 lines
441 B
Text
16 lines
441 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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menu "HID-BPF support"
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config HID_BPF
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bool "HID-BPF support"
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depends on BPF_JIT
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depends on BPF_SYSCALL
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depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS
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help
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This option allows to support eBPF programs on the HID subsystem.
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eBPF programs can fix HID devices in a lighter way than a full
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kernel patch and allow a lot more flexibility.
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For documentation, see Documentation/hid/hid-bpf.rst
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endmenu
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