linux-kernel - [RFC PATCH 1/3] Revert "arm64: debug: remove unused local_dbg

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Message-ID: <1555070699-3685-2-git-send-email-wangxiongfeng2@huawei.com>
Date:   Fri, 12 Apr 2019 20:04:57 +0800
From:   Xiongfeng Wang <wangxiongfeng2@...wei.com>
To:     <wangxiongfeng2@...wei.com>, <huawei.libin@...wei.com>,
        <james.morse@....com>, <catalin.marinas@....com>,
        <will.deacon@....com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH 1/3] Revert "arm64: debug: remove unused local_dbg_{enable, disable} macros"

This reverts commit 2572214170fb95370be21915c0397f4b6a27e7e3.

This is a preparation for the following patch. We need to enable debug
in _sdei_handler, so let's revert this patch.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
---
 arch/arm64/include/asm/irqflags.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h
index 43d8366..0a54c45 100644
--- a/arch/arm64/include/asm/irqflags.h
+++ b/arch/arm64/include/asm/irqflags.h
@@ -140,5 +140,9 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
 
 	return res;
 }
+
+#define local_dbg_enable()	asm("msr	daifclr, #8" : : : "memory")
+#define local_dbg_disable()	asm("msr	daifset, #8" : : : "memory")
+
 #endif
 #endif
-- 
1.7.12.4