Kernel: Fix `adopt_ref_if_nonnull(new T).release_nonnull()` pattern

This does the exact thing as `adopt_ref`, which is a recent addition to
AK.

Note that pointers returned by a bare new (without `nothrow`) are
guaranteed not to return null, so they can safely be converted into
references.

4 files changed, 4 insertions, 5 deletions

diff --git a/Kernel/Devices/FullDevice.cpp b/Kernel/Devices/FullDevice.cpp
index fec5cc50c9..852a4fa50e 100644
--- a/Kernel/Devices/FullDevice.cpp
+++ b/Kernel/Devices/FullDevice.cpp
@@ -15,7 +15,7 @@ namespace Kernel {
 
 UNMAP_AFTER_INIT NonnullRefPtr<FullDevice> FullDevice::must_create()
 {
-    return adopt_ref_if_nonnull(new FullDevice).release_nonnull();
+    return adopt_ref(*new FullDevice);
 }
 
 UNMAP_AFTER_INIT FullDevice::FullDevice()
@@ -45,5 +45,4 @@ KResultOr<size_t> FullDevice::write(FileDescription&, u64, const UserOrKernelBuf
         return 0;
     return ENOSPC;
 }
-
 }
diff --git a/Kernel/Devices/MemoryDevice.cpp b/Kernel/Devices/MemoryDevice.cpp
index 4a7ee97e56..6955a6dc34 100644
--- a/Kernel/Devices/MemoryDevice.cpp
+++ b/Kernel/Devices/MemoryDevice.cpp
@@ -17,7 +17,7 @@ namespace Kernel {
 
 UNMAP_AFTER_INIT NonnullRefPtr<MemoryDevice> MemoryDevice::must_create()
 {
-    return adopt_ref_if_nonnull(new MemoryDevice).release_nonnull();
+    return adopt_ref(*new MemoryDevice);
 }
 
 UNMAP_AFTER_INIT MemoryDevice::MemoryDevice()
diff --git a/Kernel/Devices/RandomDevice.cpp b/Kernel/Devices/RandomDevice.cpp
index 302ab4a00b..538e91ac37 100644
--- a/Kernel/Devices/RandomDevice.cpp
+++ b/Kernel/Devices/RandomDevice.cpp
@@ -13,7 +13,7 @@ namespace Kernel {
 
 UNMAP_AFTER_INIT NonnullRefPtr<RandomDevice> RandomDevice::must_create()
 {
-    return adopt_ref_if_nonnull(new RandomDevice).release_nonnull();
+    return adopt_ref(*new RandomDevice);
 }
 
 UNMAP_AFTER_INIT RandomDevice::RandomDevice()
diff --git a/Kernel/Devices/ZeroDevice.cpp b/Kernel/Devices/ZeroDevice.cpp
index 37324d2376..e2c7908a4f 100644
--- a/Kernel/Devices/ZeroDevice.cpp
+++ b/Kernel/Devices/ZeroDevice.cpp
@@ -14,7 +14,7 @@ namespace Kernel {
 
 UNMAP_AFTER_INIT NonnullRefPtr<ZeroDevice> ZeroDevice::must_create()
 {
-    return adopt_ref_if_nonnull(new ZeroDevice).release_nonnull();
+    return adopt_ref(*new ZeroDevice);
 }
 
 UNMAP_AFTER_INIT ZeroDevice::ZeroDevice()