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

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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: 9014cf56f1 ("bpf, arm64: Support up to 12 function arguments")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Xu 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/
This commit is contained in:
Alexei Starovoitov 2025-05-27 17:27:04 -07:00 committed by Andrii Nakryiko
parent 5ffb537e41
commit c5cebb241e
1 changed files with 2 additions and 19 deletions
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21
arch/arm64/net/bpf_jit_comp.c
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@ -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)
{
@ -2543,10 +2528,8 @@ int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags,
.idx = 0,
};
struct bpf_tramp_image im;
struct arg_aux aaux;
int nregs, ret;
nregs = btf_func_model_nregs(m);
struct arg_aux aaux;
int ret;
ret = calc_arg_aux(m, &aaux);
if (ret < 0)