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-rw-r--r--debian/patches-rt/0003-drm-amd-display-Add-a-warning-if-the-FPU-is-used-out.patch26
1 files changed, 26 insertions, 0 deletions
diff --git a/debian/patches-rt/0003-drm-amd-display-Add-a-warning-if-the-FPU-is-used-out.patch b/debian/patches-rt/0003-drm-amd-display-Add-a-warning-if-the-FPU-is-used-out.patch
new file mode 100644
index 0000000000..9e160d5a28
--- /dev/null
+++ b/debian/patches-rt/0003-drm-amd-display-Add-a-warning-if-the-FPU-is-used-out.patch
@@ -0,0 +1,26 @@
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Thu, 21 Sep 2023 16:15:14 +0200
+Subject: [PATCH 3/5] drm/amd/display: Add a warning if the FPU is used outside
+ from task context.
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
+
+Add a warning if the FPU is used from any context other than task
+context. This is only precaution since the code is not able to be used
+from softirq while the API allows it on x86 for instance.
+
+Link: https://lore.kernel.org/r/20230921141516.520471-4-bigeasy@linutronix.de
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
+@@ -84,6 +84,7 @@ void dc_fpu_begin(const char *function_n
+ {
+ int depth;
+
++ WARN_ON_ONCE(!in_task());
+ preempt_disable();
+ depth = __this_cpu_inc_return(fpu_recursion_depth);
+