Merge branch 'bpf-fsession-support-for-riscv'

Merge branch 'bpf-fsession-support-for-riscv'

Menglong Dong says:

====================
bpf: fsession support for riscv

Implement bpf fsession for the riscv architecture.

Changes v4 -> v3:
* fix the build error
* v3: https://lore.kernel.org/bpf/20260206122002.1494125-1-dongml2@chinatelecom.cn/

Changes v3 -> v2:
* fix some comments.
* v2: https://lore.kernel.org/bpf/20260206115823.1070354-1-dongml2@chinatelecom.cn/T/#t

Changes v2 -> v1:
* use bpf_prog_calls_session_cookie() in invoke_bpf() in the 2nd patch.
* v1: https://lore.kernel.org/bpf/20260203055231.1088479-1-dongml2@chinatelecom.cn/
====================

Link: https://patch.msgid.link/20260208053311.698352-1-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>