diff --git a/Kernel/FileSystem/FIFO.cpp b/Kernel/FileSystem/FIFO.cpp
index 140820ed00..9881b6916b 100644
--- a/Kernel/FileSystem/FIFO.cpp
+++ b/Kernel/FileSystem/FIFO.cpp
@@ -37,7 +37,7 @@
 
 namespace Kernel {
 
-Lockable<HashTable<FIFO*>>& all_fifos()
+static Lockable<HashTable<FIFO*>>& all_fifos()
 {
     static Lockable<HashTable<FIFO*>>* s_table;
     if (!s_table)
diff --git a/Kernel/FileSystem/Inode.cpp b/Kernel/FileSystem/Inode.cpp
index b88dd8b490..e7885e9e7b 100644
--- a/Kernel/FileSystem/Inode.cpp
+++ b/Kernel/FileSystem/Inode.cpp
@@ -39,7 +39,7 @@ namespace Kernel {
 
 static SpinLock s_all_inodes_lock;
 
-InlineLinkedList<Inode>& all_inodes()
+static InlineLinkedList<Inode>& all_inodes()
 {
     ASSERT(s_all_inodes_lock.is_locked());
 
diff --git a/Kernel/FileSystem/ProcFS.cpp b/Kernel/FileSystem/ProcFS.cpp
index 4d98a95b3c..d2220d5c36 100644
--- a/Kernel/FileSystem/ProcFS.cpp
+++ b/Kernel/FileSystem/ProcFS.cpp
@@ -260,7 +260,7 @@ ProcFS::~ProcFS()
 {
 }
 
-Optional<KBuffer> procfs$pid_fds(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_fds(InodeIdentifier identifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -296,7 +296,7 @@ Optional<KBuffer> procfs$pid_fds(InodeIdentifier identifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$pid_fd_entry(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_fd_entry(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -308,7 +308,7 @@ Optional<KBuffer> procfs$pid_fd_entry(InodeIdentifier identifier)
     return description->absolute_path().to_byte_buffer();
 }
 
-Optional<KBuffer> procfs$pid_vm(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_vm(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -357,7 +357,7 @@ Optional<KBuffer> procfs$pid_vm(InodeIdentifier identifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$pci(InodeIdentifier)
+static Optional<KBuffer> procfs$pci(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -379,7 +379,7 @@ Optional<KBuffer> procfs$pci(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$interrupts(InodeIdentifier)
+static Optional<KBuffer> procfs$interrupts(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -396,7 +396,7 @@ Optional<KBuffer> procfs$interrupts(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$keymap(InodeIdentifier)
+static Optional<KBuffer> procfs$keymap(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonObjectSerializer<KBufferBuilder> json { builder };
@@ -405,7 +405,7 @@ Optional<KBuffer> procfs$keymap(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$devices(InodeIdentifier)
+static Optional<KBuffer> procfs$devices(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -426,14 +426,14 @@ Optional<KBuffer> procfs$devices(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$uptime(InodeIdentifier)
+static Optional<KBuffer> procfs$uptime(InodeIdentifier)
 {
     KBufferBuilder builder;
     builder.appendf("%u\n", (g_uptime / 1000));
     return builder.build();
 }
 
-Optional<KBuffer> procfs$cmdline(InodeIdentifier)
+static Optional<KBuffer> procfs$cmdline(InodeIdentifier)
 {
     KBufferBuilder builder;
     builder.append(kernel_command_line().string());
@@ -441,7 +441,7 @@ Optional<KBuffer> procfs$cmdline(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$modules(InodeIdentifier)
+static Optional<KBuffer> procfs$modules(InodeIdentifier)
 {
     extern HashMap<String, OwnPtr<Module>>* g_modules;
     KBufferBuilder builder;
@@ -461,7 +461,7 @@ Optional<KBuffer> procfs$modules(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$profile(InodeIdentifier)
+static Optional<KBuffer> procfs$profile(InodeIdentifier)
 {
     InterruptDisabler disabler;
     KBufferBuilder builder;
@@ -493,7 +493,7 @@ Optional<KBuffer> procfs$profile(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$net_adapters(InodeIdentifier)
+static Optional<KBuffer> procfs$net_adapters(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -519,7 +519,7 @@ Optional<KBuffer> procfs$net_adapters(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$net_arp(InodeIdentifier)
+static Optional<KBuffer> procfs$net_arp(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -533,7 +533,7 @@ Optional<KBuffer> procfs$net_arp(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$net_tcp(InodeIdentifier)
+static Optional<KBuffer> procfs$net_tcp(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -555,7 +555,7 @@ Optional<KBuffer> procfs$net_tcp(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$net_udp(InodeIdentifier)
+static Optional<KBuffer> procfs$net_udp(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -570,7 +570,7 @@ Optional<KBuffer> procfs$net_udp(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$net_local(InodeIdentifier)
+static Optional<KBuffer> procfs$net_local(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -588,7 +588,7 @@ Optional<KBuffer> procfs$net_local(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$pid_vmobjects(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_vmobjects(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -623,7 +623,7 @@ Optional<KBuffer> procfs$pid_vmobjects(InodeIdentifier identifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$pid_unveil(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_unveil(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -648,7 +648,7 @@ Optional<KBuffer> procfs$pid_unveil(InodeIdentifier identifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$tid_stack(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$tid_stack(InodeIdentifier identifier)
 {
     auto thread = Thread::from_tid(to_tid(identifier));
     if (!thread)
@@ -659,7 +659,7 @@ Optional<KBuffer> procfs$tid_stack(InodeIdentifier identifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$pid_exe(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_exe(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -669,7 +669,7 @@ Optional<KBuffer> procfs$pid_exe(InodeIdentifier identifier)
     return custody->absolute_path().to_byte_buffer();
 }
 
-Optional<KBuffer> procfs$pid_cwd(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_cwd(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -677,7 +677,7 @@ Optional<KBuffer> procfs$pid_cwd(InodeIdentifier identifier)
     return process->current_directory().absolute_path().to_byte_buffer();
 }
 
-Optional<KBuffer> procfs$pid_root(InodeIdentifier identifier)
+static Optional<KBuffer> procfs$pid_root(InodeIdentifier identifier)
 {
     auto process = Process::from_pid(to_pid(identifier));
     if (!process)
@@ -685,7 +685,7 @@ Optional<KBuffer> procfs$pid_root(InodeIdentifier identifier)
     return process->root_directory_relative_to_global_root().absolute_path().to_byte_buffer();
 }
 
-Optional<KBuffer> procfs$self(InodeIdentifier)
+static Optional<KBuffer> procfs$self(InodeIdentifier)
 {
     char buffer[16];
     sprintf(buffer, "%d", Process::current()->pid().value());
@@ -712,7 +712,7 @@ Optional<KBuffer> procfs$mm(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$dmesg(InodeIdentifier)
+static Optional<KBuffer> procfs$dmesg(InodeIdentifier)
 {
     InterruptDisabler disabler;
     KBufferBuilder builder;
@@ -721,7 +721,7 @@ Optional<KBuffer> procfs$dmesg(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$mounts(InodeIdentifier)
+static Optional<KBuffer> procfs$mounts(InodeIdentifier)
 {
     // FIXME: This is obviously racy against the VFS mounts changing.
     KBufferBuilder builder;
@@ -740,7 +740,7 @@ Optional<KBuffer> procfs$mounts(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$df(InodeIdentifier)
+static Optional<KBuffer> procfs$df(InodeIdentifier)
 {
     // FIXME: This is obviously racy against the VFS mounts changing.
     KBufferBuilder builder;
@@ -767,7 +767,7 @@ Optional<KBuffer> procfs$df(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$cpuinfo(InodeIdentifier)
+static Optional<KBuffer> procfs$cpuinfo(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -815,7 +815,7 @@ Optional<KBuffer> procfs$memstat(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$all(InodeIdentifier)
+static Optional<KBuffer> procfs$all(InodeIdentifier)
 {
     KBufferBuilder builder;
     JsonArraySerializer array { builder };
@@ -898,7 +898,7 @@ Optional<KBuffer> procfs$all(InodeIdentifier)
     return builder.build();
 }
 
-Optional<KBuffer> procfs$inodes(InodeIdentifier)
+static Optional<KBuffer> procfs$inodes(InodeIdentifier)
 {
     extern InlineLinkedList<Inode>& all_inodes();
     KBufferBuilder builder;
diff --git a/Kernel/KSyms.cpp b/Kernel/KSyms.cpp
index bd1e8e3d1c..5a7d26caac 100644
--- a/Kernel/KSyms.cpp
+++ b/Kernel/KSyms.cpp
@@ -115,7 +115,7 @@ static void load_kernel_sybols_from_data(const KBuffer& buffer)
     g_kernel_symbols_available = true;
 }
 
-NEVER_INLINE void dump_backtrace_impl(FlatPtr base_pointer, bool use_ksyms)
+NEVER_INLINE static void dump_backtrace_impl(FlatPtr base_pointer, bool use_ksyms)
 {
     SmapDisabler disabler;
 #if 0
diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index a6fe422550..d722a4335a 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -397,6 +397,8 @@ void Process::dump_regions()
     MM.dump_kernel_regions();
 }
 
+// Make sure the compiler doesn't "optimize away" this function:
+extern void signal_trampoline_dummy(void);
 void signal_trampoline_dummy(void)
 {
     // The trampoline preserves the current eax, pushes the signal code and
diff --git a/Kernel/RTC.cpp b/Kernel/RTC.cpp
index 501074ea0a..901d13687f 100644
--- a/Kernel/RTC.cpp
+++ b/Kernel/RTC.cpp
@@ -109,7 +109,7 @@ static unsigned days_in_years_since_epoch(unsigned year)
     return days;
 }
 
-u8 bcd_to_binary(u8 bcd)
+static u8 bcd_to_binary(u8 bcd)
 {
     return (bcd & 0x0F) + ((bcd >> 4) * 10);
 }
diff --git a/Kernel/Syscalls/futex.cpp b/Kernel/Syscalls/futex.cpp
index 68bc9e1055..830579934c 100644
--- a/Kernel/Syscalls/futex.cpp
+++ b/Kernel/Syscalls/futex.cpp
@@ -29,13 +29,13 @@
 
 namespace Kernel {
 
-void compute_relative_timeout_from_absolute(const timeval& absolute_time, timeval& relative_time)
+static void compute_relative_timeout_from_absolute(const timeval& absolute_time, timeval& relative_time)
 {
     // Convert absolute time to relative time of day.
     timeval_sub(absolute_time, kgettimeofday(), relative_time);
 }
 
-void compute_relative_timeout_from_absolute(const timespec& absolute_time, timeval& relative_time)
+static void compute_relative_timeout_from_absolute(const timespec& absolute_time, timeval& relative_time)
 {
     timeval tv_absolute_time;
     timespec_to_timeval(absolute_time, tv_absolute_time);
diff --git a/Kernel/Thread.cpp b/Kernel/Thread.cpp
index ac654db1b2..31b409dd47 100644
--- a/Kernel/Thread.cpp
+++ b/Kernel/Thread.cpp
@@ -359,7 +359,7 @@ enum class DefaultSignalAction {
     Continue,
 };
 
-DefaultSignalAction default_signal_action(u8 signal)
+static DefaultSignalAction default_signal_action(u8 signal)
 {
     ASSERT(signal && signal < NSIG);
 
diff --git a/Kernel/kprintf.cpp b/Kernel/kprintf.cpp
index dbec2ad2eb..3e2eff5b04 100644
--- a/Kernel/kprintf.cpp
+++ b/Kernel/kprintf.cpp
@@ -176,7 +176,7 @@ extern "C" int kernelputstr(const char* characters, int length)
     return 0;
 }
 
-extern "C" int vdbgprintf(const char* fmt, va_list ap)
+static int vdbgprintf(const char* fmt, va_list ap)
 {
     ScopedSpinLock lock(s_log_lock);
     color_on();