From c3a3cb5c3d893d7ca75c773ddd107832f13e7b57 Mon Sep 17 00:00:00 2001 From: "Borislav Petkov (AMD)" Date: Tue, 30 Jan 2024 11:59:40 +0100 Subject: [PATCH] x86/alternatives: Optimize optimize_nops() Return early if NOPs have already been optimized. Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20240130105941.19707-4-bp@alien8.de --- arch/x86/kernel/alternative.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 4b3378c715182..67dd7c371d28a 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -233,6 +233,10 @@ static void noinline optimize_nops(const u8 * const instr, u8 *buf, size_t len) if (insn_is_nop(&insn)) { int nop = i; + /* Has the NOP already been optimized? */ + if (i + insn.length == len) + return; + next = skip_nops(buf, next, len); add_nop(buf + nop, next - nop); -- 2.30.2