Kernel: Turn VirtIOGPU operation lock from mutex into spinlock

3 files changed, 7 insertions, 7 deletions

diff --git a/Kernel/Graphics/VirtIOGPU/FramebufferDevice.cpp b/Kernel/Graphics/VirtIOGPU/FramebufferDevice.cpp
index e70733e7d5..52160312d4 100644
--- a/Kernel/Graphics/VirtIOGPU/FramebufferDevice.cpp
+++ b/Kernel/Graphics/VirtIOGPU/FramebufferDevice.cpp
@@ -83,7 +83,7 @@ ErrorOr<void> FramebufferDevice::set_head_resolution(size_t head, size_t width,
 
     auto& info = display_info();
 
-    MutexLocker locker(adapter()->operation_lock());
+    SpinlockLocker locker(adapter()->operation_lock());
 
     info.rect = {
         .x = 0,
@@ -109,7 +109,7 @@ ErrorOr<void> FramebufferDevice::flush_head_buffer(size_t)
 }
 ErrorOr<void> FramebufferDevice::flush_rectangle(size_t buffer_index, FBRect const& rect)
 {
-    MutexLocker locker(adapter()->operation_lock());
+    SpinlockLocker locker(adapter()->operation_lock());
     Protocol::Rect dirty_rect {
         .x = rect.x,
         .y = rect.y,
@@ -184,7 +184,7 @@ ErrorOr<void> FramebufferDevice::create_framebuffer()
     }
     m_framebuffer_sink_vmobject = TRY(Memory::AnonymousVMObject::try_create_with_physical_pages(pages.span()));
 
-    MutexLocker locker(adapter()->operation_lock());
+    SpinlockLocker locker(adapter()->operation_lock());
     m_current_buffer = &buffer_from_index(m_last_set_buffer_index.load());
     create_buffer(m_main_buffer, 0, m_buffer_size);
     create_buffer(m_back_buffer, m_buffer_size, m_buffer_size);
@@ -256,7 +256,7 @@ void FramebufferDevice::flush_displayed_image(Protocol::Rect const& dirty_rect,
 void FramebufferDevice::set_buffer(int buffer_index)
 {
     auto& buffer = buffer_index == 0 ? m_main_buffer : m_back_buffer;
-    MutexLocker locker(adapter()->operation_lock());
+    SpinlockLocker locker(adapter()->operation_lock());
     if (&buffer == m_current_buffer)
         return;
     m_current_buffer = &buffer;
diff --git a/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.cpp b/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.cpp
index 27212ff2ed..49169e3327 100644
--- a/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.cpp
+++ b/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.cpp
@@ -90,7 +90,7 @@ void GraphicsAdapter::initialize()
         }
         VERIFY(success);
         finish_init();
-        MutexLocker locker(m_operation_lock);
+        SpinlockLocker locker(m_operation_lock);
         // Get display information using VIRTIO_GPU_CMD_GET_DISPLAY_INFO
         query_display_information();
         query_display_edid({});
@@ -396,7 +396,7 @@ void GraphicsAdapter::populate_virtio_gpu_request_header(Protocol::ControlHeader
 
 void GraphicsAdapter::flush_dirty_rectangle(ScanoutID scanout_id, ResourceID resource_id, Protocol::Rect const& dirty_rect)
 {
-    MutexLocker locker(m_operation_lock);
+    SpinlockLocker locker(m_operation_lock);
     transfer_framebuffer_data_to_host(scanout_id, resource_id, dirty_rect);
     flush_displayed_image(resource_id, dirty_rect);
 }
diff --git a/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h b/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h
index d3dc3feb1f..a04e241d59 100644
--- a/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h
+++ b/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h
@@ -141,7 +141,7 @@ private:
 
     // Synchronous commands
     WaitQueue m_outstanding_request;
-    Mutex m_operation_lock;
+    Spinlock m_operation_lock;
     OwnPtr<Memory::Region> m_scratch_space;
 };
 }