linux-kernel - [PATCH 4.7 04/45] ARCv2: intc: Use kflag if STATUS32.IE must be reset

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Message-Id: <20161021091427.453807441@linuxfoundation.org>
Date:   Fri, 21 Oct 2016 11:17:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yuriy Kolerov <yuriy.kolerov@...opsys.com>,
        Vineet Gupta <vgupta@...opsys.com>
Subject: [PATCH 4.7 04/45] ARCv2: intc: Use kflag if STATUS32.IE must be reset

4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yuriy Kolerov <yuriy.kolerov@...opsys.com>

commit bc0c7ece6191d89f435e4e4016f74167430c6c21 upstream.

In the end of "arc_init_IRQ" STATUS32.IE flag is going to be affected by
"flag" instruction but "flag" never touches IE flag on ARCv2. So "kflag"
instruction must be used instead of "flag".

Signed-off-by: Yuriy Kolerov <yuriy.kolerov@...opsys.com>
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arc/kernel/intc-arcv2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -74,7 +74,7 @@ void arc_init_IRQ(void)
 	tmp = read_aux_reg(0xa);
 	tmp |= STATUS_AD_MASK | (irq_prio << 1);
 	tmp &= ~STATUS_IE_MASK;
-	asm volatile("flag %0	\n"::"r"(tmp));
+	asm volatile("kflag %0	\n"::"r"(tmp));
 }
 
 static void arcv2_irq_mask(struct irq_data *data)