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Implementing BPF version of preempt_count() requires accessing lowcore from BPF. Since lowcore can be relocated, open-coding (struct lowcore *)0 does not work, so add a kfunc. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Link: https://lore.kernel.org/r/20260217160813.100855-2-iii@linux.ibm.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
13 lines
214 B
C
13 lines
214 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <asm/lowcore.h>
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#include <linux/btf.h>
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__bpf_kfunc_start_defs();
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__bpf_kfunc struct lowcore *bpf_get_lowcore(void)
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{
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return get_lowcore();
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}
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__bpf_kfunc_end_defs();
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