Commit c5cebb24 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by Andrii Nakryiko
Browse files

bpf, arm64: Remove unused-but-set function and variable. 



Remove unused-but-set function and variable to fix the build warning:
   arch/arm64/net/bpf_jit_comp.c: In function 'arch_bpf_trampoline_size':
    2547 |  int nregs, ret;
         |      ^~~~~

Fixes: 9014cf56 ("bpf, arm64: Support up to 12 function arguments")
Reported-by: default avatarkernel test robot <lkp@intel.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Acked-by: default avatarXu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/bpf/20250528002704.21197-1-alexei.starovoitov@gmail.com

Closes: https://lore.kernel.org/oe-kbuild-all/202505280643.h0qYcSCM-lkp@intel.com/
parent 5ffb537e

arch/arm64/net/bpf_jit_comp.c

+2 −19
Original line number Diff line number Diff line
@@ -2520,21 +2520,6 @@ static int prepare_trampoline(struct jit_ctx *ctx, struct bpf_tramp_image *im, 
	return ctx->idx;

}



static int btf_func_model_nregs(const struct btf_func_model *m)

{

	int nregs = m->nr_args;

	int i;



	/* extra registers needed for struct argument */

	for (i = 0; i < MAX_BPF_FUNC_ARGS; i++) {

		/* The arg_size is at most 16 bytes, enforced by the verifier. */

		if (m->arg_flags[i] & BTF_FMODEL_STRUCT_ARG)

			nregs += (m->arg_size[i] + 7) / 8 - 1;

	}



	return nregs;

}



int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags,

			     struct bpf_tramp_links *tlinks, void *func_addr)

{
@@ -2544,9 +2529,7 @@ int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags, 
	};

	struct bpf_tramp_image im;

	struct arg_aux aaux;

	int nregs, ret;



	nregs = btf_func_model_nregs(m);

	int ret;



	ret = calc_arg_aux(m, &aaux);

	if (ret < 0)