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Kernel: Protect FramebufferDevice with spinlock instead of mutex

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This commit is contained in:
Andreas Kling 2022-02-03 15:33:29 +01:00
parent ddde9e7ee5
commit ca42621be1
5 changed files with 18 additions and 19 deletions
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8
Kernel/Graphics/VirtIOGPU/FramebufferDevice.cpp
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@ -25,7 +25,7 @@ ErrorOr<size_t> FramebufferDevice::buffer_length(size_t head) const
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
MutexLocker locker(m_resolution_lock);
SpinlockLocker locker(m_resolution_lock);
return display_info().rect.width * display_info().rect.height * 4;
}
ErrorOr<size_t> FramebufferDevice::pitch(size_t head) const
@ -34,7 +34,7 @@ ErrorOr<size_t> FramebufferDevice::pitch(size_t head) const
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
MutexLocker locker(m_resolution_lock);
SpinlockLocker locker(m_resolution_lock);
return display_info().rect.width * 4;
}
ErrorOr<size_t> FramebufferDevice::height(size_t head) const
@ -43,7 +43,7 @@ ErrorOr<size_t> FramebufferDevice::height(size_t head) const
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
MutexLocker locker(m_resolution_lock);
SpinlockLocker locker(m_resolution_lock);
return display_info().rect.height;
}
ErrorOr<size_t> FramebufferDevice::width(size_t head) const
@ -52,7 +52,7 @@ ErrorOr<size_t> FramebufferDevice::width(size_t head) const
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
MutexLocker locker(m_resolution_lock);
SpinlockLocker locker(m_resolution_lock);
return display_info().rect.width;
}
ErrorOr<size_t> FramebufferDevice::vertical_offset(size_t head) const