From: Tiezhu Yang <yangtiezhu@loongson.cn>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Zi Shen Lim <zlim.lnx@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next] bpf: arm64: Replace STACK_ALIGN() with round_up() to align stack size
Date: Mon, 10 May 2021 20:51:59 +0800 [thread overview]
Message-ID: <1620651119-5663-1-git-send-email-yangtiezhu@loongson.cn> (raw)
Use the common function round_up() directly to show the align size
explicitly, the function STACK_ALIGN() is needless, remove it.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
arch/arm64/net/bpf_jit_comp.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index f7b1948..81c380f 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -178,9 +178,6 @@ static bool is_addsub_imm(u32 imm)
return !(imm & ~0xfff) || !(imm & ~0xfff000);
}
-/* Stack must be multiples of 16B */
-#define STACK_ALIGN(sz) (((sz) + 15) & ~15)
-
/* Tail call offset to jump into */
#if IS_ENABLED(CONFIG_ARM64_BTI_KERNEL)
#define PROLOGUE_OFFSET 8
@@ -255,7 +252,7 @@ static int build_prologue(struct jit_ctx *ctx, bool ebpf_from_cbpf)
emit(A64_BTI_J, ctx);
}
- ctx->stack_size = STACK_ALIGN(prog->aux->stack_depth);
+ ctx->stack_size = round_up(prog->aux->stack_depth, 16);
/* Set up function call stack */
emit(A64_SUB_I(1, A64_SP, A64_SP, ctx->stack_size), ctx);
--
2.1.0
next reply other threads:[~2021-05-10 13:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-10 12:51 Tiezhu Yang [this message]
2021-05-12 20:56 ` [PATCH bpf-next] bpf: arm64: Replace STACK_ALIGN() with round_up() to align stack size Daniel Borkmann
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