diff --git a/kernel/include/kernel/Process.h b/kernel/include/kernel/Process.h
index 5c580fbe..0a74a380 100644
--- a/kernel/include/kernel/Process.h
+++ b/kernel/include/kernel/Process.h
@@ -4,6 +4,7 @@
 #include <BAN/StringView.h>
 #include <BAN/Vector.h>
 #include <kernel/FS/Inode.h>
+#include <kernel/SpinLock.h>
 #include <kernel/Thread.h>
 
 namespace Kernel
@@ -60,6 +61,8 @@ namespace Kernel
 
 		BAN::Vector<OpenFileDescription> m_open_files;
 
+		mutable SpinLock m_lock;
+
 		pid_t m_pid = 0;
 		BAN::String m_working_directory;
 		BAN::Vector<BAN::RefPtr<Thread>> m_threads;
diff --git a/kernel/include/kernel/Storage/ATAController.h b/kernel/include/kernel/Storage/ATAController.h
index fc6c8e9c..6fc05499 100644
--- a/kernel/include/kernel/Storage/ATAController.h
+++ b/kernel/include/kernel/Storage/ATAController.h
@@ -1,7 +1,6 @@
 #pragma once
 
 #include <BAN/Errors.h>
-#include <kernel/SpinLock.h>
 #include <kernel/Storage/StorageController.h>
 
 namespace Kernel
@@ -68,7 +67,6 @@ namespace Kernel
 		BAN::ErrorOr<void> write(ATADevice*, uint64_t, uint8_t, const uint8_t*);
 
 	private:
-		SpinLock m_lock;
 		ATABus m_buses[2];
 		const PCIDevice& m_pci_device;
 
diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index 7e1a7e00..8b3e6fc7 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -1,7 +1,8 @@
 #include <BAN/StringView.h>
+#include <kernel/FS/VirtualFileSystem.h>
+#include <kernel/LockGuard.h>
 #include <kernel/Process.h>
 #include <kernel/Scheduler.h>
-#include <kernel/FS/VirtualFileSystem.h>
 
 #include <fcntl.h>
 
@@ -37,6 +38,8 @@ namespace Kernel
 
 	BAN::ErrorOr<int> Process::open(BAN::StringView path, int flags)
 	{
+		LockGuard _(m_lock);
+
 		if (flags != O_RDONLY)
 			return BAN::Error::from_errno(ENOTSUP);
 
@@ -56,6 +59,8 @@ namespace Kernel
 
 	BAN::ErrorOr<void> Process::close(int fd)
 	{
+		LockGuard _(m_lock);
+
 		TRY(validate_fd(fd));
 		auto& open_file_description = this->open_file_description(fd);
 		open_file_description.inode = nullptr;
@@ -64,6 +69,8 @@ namespace Kernel
 
 	BAN::ErrorOr<size_t> Process::read(int fd, void* buffer, size_t count)
 	{
+		LockGuard _(m_lock);
+
 		TRY(validate_fd(fd));
 		auto& open_file_description = this->open_file_description(fd);
 		if (open_file_description.offset >= open_file_description.inode->size())
@@ -74,6 +81,8 @@ namespace Kernel
 
 	BAN::ErrorOr<void> Process::creat(BAN::StringView path, mode_t mode)
 	{
+		LockGuard _(m_lock);
+
 		auto absolute_path = TRY(absolute_path_of(path));
 		while (absolute_path.sv().back() != '/')
 			absolute_path.pop_back();
@@ -86,12 +95,16 @@ namespace Kernel
 
 	Inode& Process::inode_for_fd(int fd)
 	{
+		LockGuard _(m_lock);
+
 		MUST(validate_fd(fd));
 		return *open_file_description(fd).inode;
 	}
 
 	BAN::ErrorOr<void> Process::set_working_directory(BAN::StringView path)
 	{
+		LockGuard _(m_lock);
+
 		BAN::String absolute_path = TRY(absolute_path_of(path));
 
 		auto file = TRY(VirtualFileSystem::get().file_from_absolute_path(absolute_path));
diff --git a/kernel/kernel/Storage/ATAController.cpp b/kernel/kernel/Storage/ATAController.cpp
index 06023e2f..492fafef 100644
--- a/kernel/kernel/Storage/ATAController.cpp
+++ b/kernel/kernel/Storage/ATAController.cpp
@@ -1,5 +1,4 @@
 #include <kernel/IO.h>
-#include <kernel/LockGuard.h>
 #include <kernel/Storage/ATAController.h>
 
 #define ATA_PRIMARY  	0
@@ -191,8 +190,6 @@ namespace Kernel
 		if (lba + sector_count > device->lba_count)
 			return BAN::Error::from_c_string("Attempted to read outside of the device boundaries");
 
-		LockGuard _(m_lock);
-
 		if (lba < (1 << 28))
 		{
 			// LBA28
@@ -223,8 +220,6 @@ namespace Kernel
 		if (lba + sector_count > device->lba_count)
 			return BAN::Error::from_c_string("Attempted to read outside of the device boundaries");
 
-		LockGuard _(m_lock);
-
 		if (lba < (1 << 28))
 		{
 			// LBA28
@@ -247,8 +242,8 @@ namespace Kernel
 			ASSERT(false);
 		}
 
-		device->bus->write(ATA_PORT_COMMAND, ATA_COMMAND_CACHE_FLUSH);
 		TRY(device->bus->wait(false));
+		device->bus->write(ATA_PORT_COMMAND, ATA_COMMAND_CACHE_FLUSH);
 
 		return {};
 	}