[Intel-gfx] [PATCH 5/5] drm/i915: fully convert the IRQ initialization macros to intel_uncore
Paulo Zanoni
paulo.r.zanoni at intel.com
Wed Apr 10 23:53:44 UTC 2019
Make them take the uncore argument from the caller instead of passing
the implicit &dev_priv->uncore directly. This will allow us to finally
pass something that's not dev_priv->uncore in the future, and gets rid
of the implicit variables in register macros.
v2: Rebase on top of the newer patches.
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com> (v1)
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 144 +++++++++++++++++++-------------
1 file changed, 88 insertions(+), 56 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 22b89da25289..f6ab4c4c6388 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -165,18 +165,18 @@ static void gen2_irq_reset(struct intel_uncore *uncore)
intel_uncore_posting_read16(uncore, GEN2_IIR);
}
-#define GEN8_IRQ_RESET_NDX(type, which) \
+#define GEN8_IRQ_RESET_NDX(uncore, type, which) \
({ \
unsigned int which_ = which; \
- gen3_irq_reset(&dev_priv->uncore, GEN8_##type##_IMR(which_), \
+ gen3_irq_reset((uncore), GEN8_##type##_IMR(which_), \
GEN8_##type##_IIR(which_), GEN8_##type##_IER(which_)); \
})
-#define GEN3_IRQ_RESET(type) \
- gen3_irq_reset(&dev_priv->uncore, type##IMR, type##IIR, type##IER)
+#define GEN3_IRQ_RESET(uncore, type) \
+ gen3_irq_reset((uncore), type##IMR, type##IIR, type##IER)
-#define GEN2_IRQ_RESET() \
- gen2_irq_reset(&dev_priv->uncore)
+#define GEN2_IRQ_RESET(uncore) \
+ gen2_irq_reset(uncore)
/*
* We should clear IMR at preinstall/uninstall, and just check at postinstall.
@@ -233,23 +233,23 @@ static void gen2_irq_init(struct intel_uncore *uncore,
intel_uncore_posting_read16(uncore, GEN2_IMR);
}
-#define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) \
+#define GEN8_IRQ_INIT_NDX(uncore, type, which, imr_val, ier_val) \
({ \
unsigned int which_ = which; \
- gen3_irq_init(&dev_priv->uncore, \
+ gen3_irq_init((uncore), \
GEN8_##type##_IMR(which_), imr_val, \
GEN8_##type##_IER(which_), ier_val, \
GEN8_##type##_IIR(which_)); \
})
-#define GEN3_IRQ_INIT(type, imr_val, ier_val) \
- gen3_irq_init(&dev_priv->uncore, \
+#define GEN3_IRQ_INIT(uncore, type, imr_val, ier_val) \
+ gen3_irq_init((uncore), \
type##IMR, imr_val, \
type##IER, ier_val, \
type##IIR)
-#define GEN2_IRQ_INIT(imr_val, ier_val) \
- gen2_irq_init(&dev_priv->uncore, imr_val, ier_val)
+#define GEN2_IRQ_INIT(uncore, imr_val, ier_val) \
+ gen2_irq_init((uncore), imr_val, ier_val)
static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
@@ -3349,10 +3349,12 @@ static void i945gm_vblank_work_fini(struct drm_i915_private *dev_priv)
static void ibx_irq_reset(struct drm_i915_private *dev_priv)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
if (HAS_PCH_NOP(dev_priv))
return;
- GEN3_IRQ_RESET(SDE);
+ GEN3_IRQ_RESET(uncore, SDE);
if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
I915_WRITE(SERR_INT, 0xffffffff);
@@ -3380,13 +3382,17 @@ static void ibx_irq_pre_postinstall(struct drm_device *dev)
static void gen5_gt_irq_reset(struct drm_i915_private *dev_priv)
{
- GEN3_IRQ_RESET(GT);
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
+ GEN3_IRQ_RESET(uncore, GT);
if (INTEL_GEN(dev_priv) >= 6)
- GEN3_IRQ_RESET(GEN6_PM);
+ GEN3_IRQ_RESET(uncore, GEN6_PM);
}
static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
if (IS_CHERRYVIEW(dev_priv))
I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
else
@@ -3397,12 +3403,14 @@ static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
i9xx_pipestat_irq_reset(dev_priv);
- GEN3_IRQ_RESET(VLV_);
+ GEN3_IRQ_RESET(uncore, VLV_);
dev_priv->irq_mask = ~0u;
}
static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
u32 pipestat_mask;
u32 enable_mask;
enum pipe pipe;
@@ -3427,7 +3435,7 @@ static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
dev_priv->irq_mask = ~enable_mask;
- GEN3_IRQ_INIT(VLV_, dev_priv->irq_mask, enable_mask);
+ GEN3_IRQ_INIT(uncore, VLV_, dev_priv->irq_mask, enable_mask);
}
/* drm_dma.h hooks
@@ -3435,8 +3443,9 @@ static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
static void ironlake_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
- GEN3_IRQ_RESET(DE);
+ GEN3_IRQ_RESET(uncore, DE);
if (IS_GEN(dev_priv, 7))
I915_WRITE(GEN7_ERR_INT, 0xffffffff);
@@ -3467,15 +3476,18 @@ static void valleyview_irq_reset(struct drm_device *dev)
static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
{
- GEN8_IRQ_RESET_NDX(GT, 0);
- GEN8_IRQ_RESET_NDX(GT, 1);
- GEN8_IRQ_RESET_NDX(GT, 2);
- GEN8_IRQ_RESET_NDX(GT, 3);
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
+ GEN8_IRQ_RESET_NDX(uncore, GT, 0);
+ GEN8_IRQ_RESET_NDX(uncore, GT, 1);
+ GEN8_IRQ_RESET_NDX(uncore, GT, 2);
+ GEN8_IRQ_RESET_NDX(uncore, GT, 3);
}
static void gen8_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
int pipe;
gen8_master_intr_disable(dev_priv->uncore.regs);
@@ -3488,11 +3500,11 @@ static void gen8_irq_reset(struct drm_device *dev)
for_each_pipe(dev_priv, pipe)
if (intel_display_power_is_enabled(dev_priv,
POWER_DOMAIN_PIPE(pipe)))
- GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
+ GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
- GEN3_IRQ_RESET(GEN8_DE_PORT_);
- GEN3_IRQ_RESET(GEN8_DE_MISC_);
- GEN3_IRQ_RESET(GEN8_PCU_);
+ GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
+ GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
+ GEN3_IRQ_RESET(uncore, GEN8_PCU_);
if (HAS_PCH_SPLIT(dev_priv))
ibx_irq_reset(dev_priv);
@@ -3518,6 +3530,7 @@ static void gen11_gt_irq_reset(struct drm_i915_private *dev_priv)
static void gen11_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_uncore *uncore = &dev_priv->uncore;
int pipe;
gen11_master_intr_disable(dev_priv->uncore.regs);
@@ -3532,21 +3545,23 @@ static void gen11_irq_reset(struct drm_device *dev)
for_each_pipe(dev_priv, pipe)
if (intel_display_power_is_enabled(dev_priv,
POWER_DOMAIN_PIPE(pipe)))
- GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
+ GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
- GEN3_IRQ_RESET(GEN8_DE_PORT_);
- GEN3_IRQ_RESET(GEN8_DE_MISC_);
- GEN3_IRQ_RESET(GEN11_DE_HPD_);
- GEN3_IRQ_RESET(GEN11_GU_MISC_);
- GEN3_IRQ_RESET(GEN8_PCU_);
+ GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
+ GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
+ GEN3_IRQ_RESET(uncore, GEN11_DE_HPD_);
+ GEN3_IRQ_RESET(uncore, GEN11_GU_MISC_);
+ GEN3_IRQ_RESET(uncore, GEN8_PCU_);
if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
- GEN3_IRQ_RESET(SDE);
+ GEN3_IRQ_RESET(uncore, SDE);
}
void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
u8 pipe_mask)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
u32 extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
enum pipe pipe;
@@ -3558,7 +3573,7 @@ void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
}
for_each_pipe_masked(dev_priv, pipe, pipe_mask)
- GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
+ GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
dev_priv->de_irq_mask[pipe],
~dev_priv->de_irq_mask[pipe] | extra_ier);
@@ -3568,6 +3583,7 @@ void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
u8 pipe_mask)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
enum pipe pipe;
spin_lock_irq(&dev_priv->irq_lock);
@@ -3578,7 +3594,7 @@ void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
}
for_each_pipe_masked(dev_priv, pipe, pipe_mask)
- GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
+ GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
spin_unlock_irq(&dev_priv->irq_lock);
@@ -3589,13 +3605,14 @@ void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
static void cherryview_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
I915_WRITE(GEN8_MASTER_IRQ, 0);
POSTING_READ(GEN8_MASTER_IRQ);
gen8_gt_irq_reset(dev_priv);
- GEN3_IRQ_RESET(GEN8_PCU_);
+ GEN3_IRQ_RESET(uncore, GEN8_PCU_);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
@@ -3880,6 +3897,7 @@ static void ibx_irq_postinstall(struct drm_device *dev)
static void gen5_gt_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
u32 pm_irqs, gt_irqs;
pm_irqs = gt_irqs = 0;
@@ -3898,7 +3916,7 @@ static void gen5_gt_irq_postinstall(struct drm_device *dev)
gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
}
- GEN3_IRQ_INIT(GT, dev_priv->gt_irq_mask, gt_irqs);
+ GEN3_IRQ_INIT(uncore, GT, dev_priv->gt_irq_mask, gt_irqs);
if (INTEL_GEN(dev_priv) >= 6) {
/*
@@ -3911,13 +3929,14 @@ static void gen5_gt_irq_postinstall(struct drm_device *dev)
}
dev_priv->pm_imr = 0xffffffff;
- GEN3_IRQ_INIT(GEN6_PM, dev_priv->pm_imr, pm_irqs);
+ GEN3_IRQ_INIT(uncore, GEN6_PM, dev_priv->pm_imr, pm_irqs);
}
}
static int ironlake_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
u32 display_mask, extra_mask;
if (INTEL_GEN(dev_priv) >= 7) {
@@ -3936,7 +3955,7 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
}
if (IS_HASWELL(dev_priv)) {
- gen3_assert_iir_is_zero(&dev_priv->uncore, EDP_PSR_IIR);
+ gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
display_mask |= DE_EDP_PSR_INT_HSW;
}
@@ -3945,7 +3964,8 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
ibx_irq_pre_postinstall(dev);
- GEN3_IRQ_INIT(DE, dev_priv->irq_mask, display_mask | extra_mask);
+ GEN3_IRQ_INIT(uncore, DE, dev_priv->irq_mask,
+ display_mask | extra_mask);
gen5_gt_irq_postinstall(dev);
@@ -4015,6 +4035,8 @@ static int valleyview_irq_postinstall(struct drm_device *dev)
static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
/* These are interrupts we'll toggle with the ring mask register */
u32 gt_interrupts[] = {
(GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
@@ -4035,18 +4057,20 @@ static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
dev_priv->pm_ier = 0x0;
dev_priv->pm_imr = ~dev_priv->pm_ier;
- GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
- GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
+ GEN8_IRQ_INIT_NDX(uncore, GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
+ GEN8_IRQ_INIT_NDX(uncore, GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
/*
* RPS interrupts will get enabled/disabled on demand when RPS itself
* is enabled/disabled. Same wil be the case for GuC interrupts.
*/
- GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_imr, dev_priv->pm_ier);
- GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
+ GEN8_IRQ_INIT_NDX(uncore, GT, 2, dev_priv->pm_imr, dev_priv->pm_ier);
+ GEN8_IRQ_INIT_NDX(uncore, GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
}
static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
+
u32 de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
u32 de_pipe_enables;
u32 de_port_masked = GEN8_AUX_CHANNEL_A;
@@ -4082,7 +4106,7 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
else if (IS_BROADWELL(dev_priv))
de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
- gen3_assert_iir_is_zero(&dev_priv->uncore, EDP_PSR_IIR);
+ gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
for_each_pipe(dev_priv, pipe) {
@@ -4090,20 +4114,21 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
if (intel_display_power_is_enabled(dev_priv,
POWER_DOMAIN_PIPE(pipe)))
- GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
+ GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
dev_priv->de_irq_mask[pipe],
de_pipe_enables);
}
- GEN3_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
- GEN3_IRQ_INIT(GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);
+ GEN3_IRQ_INIT(uncore, GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
+ GEN3_IRQ_INIT(uncore, GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);
if (INTEL_GEN(dev_priv) >= 11) {
u32 de_hpd_masked = 0;
u32 de_hpd_enables = GEN11_DE_TC_HOTPLUG_MASK |
GEN11_DE_TBT_HOTPLUG_MASK;
- GEN3_IRQ_INIT(GEN11_DE_HPD_, ~de_hpd_masked, de_hpd_enables);
+ GEN3_IRQ_INIT(uncore, GEN11_DE_HPD_, ~de_hpd_masked,
+ de_hpd_enables);
gen11_hpd_detection_setup(dev_priv);
} else if (IS_GEN9_LP(dev_priv)) {
bxt_hpd_detection_setup(dev_priv);
@@ -4175,6 +4200,7 @@ static void icp_irq_postinstall(struct drm_device *dev)
static int gen11_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_uncore *uncore = &dev_priv->uncore;
u32 gu_misc_masked = GEN11_GU_MISC_GSE;
if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
@@ -4183,7 +4209,7 @@ static int gen11_irq_postinstall(struct drm_device *dev)
gen11_gt_irq_postinstall(dev_priv);
gen8_de_irq_postinstall(dev_priv);
- GEN3_IRQ_INIT(GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked);
+ GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked);
I915_WRITE(GEN11_DISPLAY_INT_CTL, GEN11_DISPLAY_IRQ_ENABLE);
@@ -4213,15 +4239,17 @@ static int cherryview_irq_postinstall(struct drm_device *dev)
static void i8xx_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
i9xx_pipestat_irq_reset(dev_priv);
- GEN2_IRQ_RESET();
+ GEN2_IRQ_RESET(uncore);
}
static int i8xx_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
u16 enable_mask;
I915_WRITE16(EMR, ~(I915_ERROR_PAGE_TABLE |
@@ -4239,7 +4267,7 @@ static int i8xx_irq_postinstall(struct drm_device *dev)
I915_MASTER_ERROR_INTERRUPT |
I915_USER_INTERRUPT;
- GEN2_IRQ_INIT(dev_priv->irq_mask, enable_mask);
+ GEN2_IRQ_INIT(uncore, dev_priv->irq_mask, enable_mask);
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
@@ -4375,6 +4403,7 @@ static irqreturn_t i8xx_irq_handler(int irq, void *arg)
static void i915_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
if (I915_HAS_HOTPLUG(dev_priv)) {
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
@@ -4383,12 +4412,13 @@ static void i915_irq_reset(struct drm_device *dev)
i9xx_pipestat_irq_reset(dev_priv);
- GEN3_IRQ_RESET(GEN2_);
+ GEN3_IRQ_RESET(uncore, GEN2_);
}
static int i915_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
u32 enable_mask;
I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE |
@@ -4415,7 +4445,7 @@ static int i915_irq_postinstall(struct drm_device *dev)
dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
}
- GEN3_IRQ_INIT(GEN2_, dev_priv->irq_mask, enable_mask);
+ GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask);
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
@@ -4486,18 +4516,20 @@ static irqreturn_t i915_irq_handler(int irq, void *arg)
static void i965_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
i9xx_pipestat_irq_reset(dev_priv);
- GEN3_IRQ_RESET(GEN2_);
+ GEN3_IRQ_RESET(uncore, GEN2_);
}
static int i965_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_uncore *uncore = &dev_priv->uncore;
u32 enable_mask;
u32 error_mask;
@@ -4535,7 +4567,7 @@ static int i965_irq_postinstall(struct drm_device *dev)
if (IS_G4X(dev_priv))
enable_mask |= I915_BSD_USER_INTERRUPT;
- GEN3_IRQ_INIT(GEN2_, dev_priv->irq_mask, enable_mask);
+ GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask);
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
--
2.20.1
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