diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2026-02-17 17:05:08 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-03-03 08:35:07 -0800 |
| commit | 6fe54677bcc2e7a42f5fcaa3c66600232ba54d44 (patch) | |
| tree | ba956500a3e669fa3fd6e355cbccdb64f28d221d /kernel | |
| parent | 309d8808eef93d29b65ae69241a4475b2c8bd6fe (diff) | |
s390: Introduce bpf_get_lowcore() kfunc
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/helpers.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 6eb6c82ed2ee..cb6d242bd093 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -4578,6 +4578,9 @@ BTF_ID_FLAGS(func, bpf_key_put, KF_RELEASE) BTF_ID_FLAGS(func, bpf_verify_pkcs7_signature, KF_SLEEPABLE) #endif #endif +#ifdef CONFIG_S390 +BTF_ID_FLAGS(func, bpf_get_lowcore) +#endif BTF_KFUNCS_END(generic_btf_ids) static const struct btf_kfunc_id_set generic_kfunc_set = { |