Commit 18a45f12 authored by Hou Tao's avatar Hou Tao Committed by Alexei Starovoitov
Browse files

bpf, arm64: Enable the inline of bpf_kptr_xchg() 



ARM64 bpf jit satisfies the following two conditions:
1) support BPF_XCHG() on pointer-sized word.
2) the implementation of xchg is the same as atomic_xchg() on
   pointer-sized words. Both of these two functions use arch_xchg() to
   implement the exchange.

So enable the inline of bpf_kptr_xchg() for arm64 bpf jit.

Signed-off-by: default avatarHou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20240119102529.99581-2-houtao@huaweicloud.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 20e109ea

arch/arm64/net/bpf_jit_comp.c

+5 −0
Original line number Diff line number Diff line
@@ -2305,3 +2305,8 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type, 


	return ret;

}



bool bpf_jit_supports_ptr_xchg(void)

{

	return true;

}