Re: [PATCH 1/1] bpf: avoid unnecessary IPI in bpf_flush_icache
From: Daniel Borkmann <daniel@iogearbox.net>
Date: 2021-06-01 17:20:19
Also in:
bpf, lkml, netdev
On 6/1/21 5:06 PM, Yanfei Xu wrote:
It's no need to trigger IPI for keeping pipeline fresh in bpf case.
This needs a more concrete explanation/analysis on "why it is safe" to do so rather than just saying that it is not needed.
quoted hunk ↗ jump to hunk
Signed-off-by: Yanfei Xu <redacted> --- arch/arm64/net/bpf_jit_comp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index f7b194878a99..5311f8be4ba4 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c@@ -974,7 +974,7 @@ static int validate_code(struct jit_ctx *ctx) static inline void bpf_flush_icache(void *start, void *end) { - flush_icache_range((unsigned long)start, (unsigned long)end); + __flush_icache_range((unsigned long)start, (unsigned long)end); } struct arm64_jit_data {
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