fix: new spinlock implementation, ramdisk max files, wallpaper scan locations

kernel/src/CppLib/Spinlock.cpp

@@ -8,12 +8,17 @@
 
 namespace kcp {
     void Spinlock::Acquire() {
+        uint64_t flags;
+        asm volatile("pushfq; pop %0; cli" : "=r"(flags) :: "memory");
         while (atomic_flag.test_and_set(std::memory_order_acquire)) {
             asm volatile("pause");
         }
+        savedFlags = flags;
     }
 
     void Spinlock::Release() {
+        uint64_t flags = savedFlags;
         atomic_flag.clear(std::memory_order_release);
+        asm volatile("push %0; popfq" :: "r"(flags) : "memory");
     }
 };

kernel/src/CppLib/Spinlock.hpp

@@ -10,6 +10,7 @@
 namespace kcp {
     class Spinlock {
         std::atomic_flag atomic_flag{ATOMIC_FLAG_INIT};
+        uint64_t savedFlags = 0;
     public:
         void Acquire();
         void Release();

kernel/src/Fs/Ramdisk.hpp

@@ -10,7 +10,7 @@
 
 namespace Fs::Ramdisk {
 
-    static constexpr int MaxFiles = 256;
+    static constexpr int MaxFiles = 512;
     static constexpr int MaxNameLen = 100;
 
     struct FileEntry {