Kernel: Remove unused KMALLOC_DEBUG_LARGE_ALLOCATIONS mode

This was a thing back when the system was so little that any kernel
allocation above 1 MiB was basically guaranteed to be a bug. :^)

Kernel/Debug.h.in

@@ -150,10 +150,6 @@
 #cmakedefine01 KEYBOARD_DEBUG
 #endif
 
-#ifndef KMALLOC_DEBUG
-#cmakedefine01 KMALLOC_DEBUG
-#endif
-
 #ifndef LOCAL_SOCKET_DEBUG
 #cmakedefine01 LOCAL_SOCKET_DEBUG
 #endif
@@ -317,7 +313,3 @@
 #ifndef WAITQUEUE_DEBUG
 #cmakedefine01 WAITQUEUE_DEBUG
 #endif
-
-#ifndef KMALLOC_DEBUG_LARGE_ALLOCATIONS
-#cmakedefine01 KMALLOC_DEBUG_LARGE_ALLOCATIONS
-#endif

Kernel/Heap/kmalloc.cpp

@@ -236,7 +236,7 @@ void* kmalloc_eternal(size_t size)
     return ptr;
 }
 
-void* kmalloc_impl(size_t size)
+void* kmalloc(size_t size)
 {
     ScopedSpinLock lock(s_lock);
     ++g_kmalloc_call_count;

Kernel/Heap/kmalloc.h

@@ -53,15 +53,7 @@ extern bool g_dump_kmalloc_stacks;
 inline void* operator new(size_t, void* p) { return p; }
 inline void* operator new[](size_t, void* p) { return p; }
 
-[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] ALWAYS_INLINE void* kmalloc(size_t size)
-{
-#if KMALLOC_DEBUG_LARGE_ALLOCATIONS
-    // Any kernel allocation >= 1M is 99.9% a bug.
-    if (size >= 1048576)
-        asm volatile("cli;hlt");
-#endif
-    return kmalloc_impl(size);
-}
+[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc(size_t);
 
 template<size_t ALIGNMENT>
 [[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] inline void* kmalloc_aligned(size_t size)

Meta/CMake/all_the_debug_macros.cmake

@@ -134,7 +134,6 @@ set(ICO_DEBUG ON)
 set(IPV4_DEBUG ON)
 set(IRC_DEBUG ON)
 set(KEYBOARD_DEBUG ON)
-set(KMALLOC_DEBUG_LARGE_ALLOCATIONS ON)
 set(LEXER_DEBUG ON)
 set(LOOKUPSERVER_DEBUG ON)
 set(MALLOC_DEBUG ON)