Module raw_spin_lock_without_guard 

Raw spin lock without guard, specifically designed for Global Allocator integration

This module provides a spin lock implementation that integrates with lock_api::RawMutex for use with the talc allocator’s Talck type.

Key Differences from RawSpinLock

• Implements lock_api::RawMutex trait
• Does not return a Guard from lock() method
• Stores interrupt state internally using AtomicUsize
• Unlock operation restores the interrupt state

Interrupt Safety

This lock provides interrupt protection to prevent deadlocks when:

• A thread holds the allocator lock
• An interrupt occurs on the same CPU
• The interrupt handler tries to allocate memory

Without interrupt protection, this would cause a deadlock.

Structs

RawSpinLockWithoutGuard

自旋锁结构体，不返回 Guard，集成了中断状态保存与恢复功能。