26 lines
1,011 B
Diff
26 lines
1,011 B
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Thu, 21 Sep 2023 16:15:14 +0200
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Subject: [PATCH 3/5] drm/amd/display: Add a warning if the FPU is used outside
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from task context.
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
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Add a warning if the FPU is used from any context other than task
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context. This is only precaution since the code is not able to be used
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from softirq while the API allows it on x86 for instance.
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Link: https://lore.kernel.org/r/20230921141516.520471-4-bigeasy@linutronix.de
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 1 +
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1 file changed, 1 insertion(+)
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--- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
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+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
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@@ -84,6 +84,7 @@ void dc_fpu_begin(const char *function_n
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{
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int depth;
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+ WARN_ON_ONCE(!in_task());
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preempt_disable();
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depth = __this_cpu_inc_return(fpu_recursion_depth);
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