linux-kernel - [PATCH] arm64/kernel/probes: Use BUG_ON instead of if condition followed by BUG.

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Message-Id: <1617105472-6081-1-git-send-email-zhouchuangao@vivo.com>
Date:   Tue, 30 Mar 2021 04:57:50 -0700
From:   zhouchuangao <zhouchuangao@...o.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Qais Yousef <qais.yousef@....com>,
        zhouchuangao <zhouchuangao@...o.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64/kernel/probes: Use BUG_ON instead of if condition followed by BUG.

It can be optimized at compile time.

Signed-off-by: zhouchuangao <zhouchuangao@...o.com>
---
 arch/arm64/kernel/probes/kprobes.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index 66aac28..ecf0f61 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -264,8 +264,7 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr)
 		 * normal page fault.
 		 */
 		instruction_pointer_set(regs, (unsigned long) cur->addr);
-		if (!instruction_pointer(regs))
-			BUG();
+		BUG_ON(!instruction_pointer(regs));
 
 		if (kcb->kprobe_status == KPROBE_REENTER)
 			restore_previous_kprobe(kcb);
-- 
2.7.4