linux-kernel - [PATCH 2/3] Revert "arm64: smp: avoid NMI IPIs with broken MediaTek FW"

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Message-ID: <20231006151547.2.I2c5fa192e767eb3ee233bc28eb60e2f8656c29a6@changeid>
Date:   Fri,  6 Oct 2023 15:15:52 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Marc Zyngier <maz@...nel.org>, Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Chen-Yu Tsai <wenst@...omium.org>
Cc:     Douglas Anderson <dianders@...omium.org>,
        D Scott Phillips <scott@...amperecomputing.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Valentin Schneider <vschneid@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] Revert "arm64: smp: avoid NMI IPIs with broken MediaTek FW"

This reverts commit a07a594152173a3dd3bdd12fc7d73dbba54cdbca.

This is no longer needed after the patch ("arm64: Disable GiC
priorities on Mediatek devices w/ firmware issues").

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 arch/arm64/kernel/smp.c      | 5 +----
 drivers/irqchip/irq-gic-v3.c | 2 +-
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 16ead57a583d..f36a97a54d2b 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -964,10 +964,7 @@ static void smp_cross_call(const struct cpumask *target, unsigned int ipinr)
 
 static bool ipi_should_be_nmi(enum ipi_msg_type ipi)
 {
-	DECLARE_STATIC_KEY_FALSE(supports_pseudo_nmis);
-
-	if (!system_uses_irq_prio_masking() ||
-	    !static_branch_likely(&supports_pseudo_nmis))
+	if (!system_uses_irq_prio_masking())
 		return false;
 
 	switch (ipi) {
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 737da1b9aabf..787ccc880b22 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -106,7 +106,7 @@ static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key);
  * - Figure 4-7 Secure read of the priority field for a Non-secure Group 1
  *   interrupt.
  */
-DEFINE_STATIC_KEY_FALSE(supports_pseudo_nmis);
+static DEFINE_STATIC_KEY_FALSE(supports_pseudo_nmis);
 
 DEFINE_STATIC_KEY_FALSE(gic_nonsecure_priorities);
 EXPORT_SYMBOL(gic_nonsecure_priorities);
-- 
2.42.0.609.gbb76f46606-goog