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목록strex (1)
Art of Pr0gr4m
[Linux Kernel] spinlock
arm 리눅스 커널의 spin lock 구현부를 보면 다음과 같다. typedef struct { union { u32 slock; struct __raw_tickets { #ifdef __ARMEB__ u16 next; u16 owner; #else u16 owner; u16 next; #endif } tickets; }; } arch_spinlock_t; static inline void arch_spin_lock(arch_spinlock_t *lock) { unsigned long tmp; u32 newval; arch_spinlock_t lockval; prefetchw(&lock->slock); __asm__ __volatile__( "1:ldrex%0, [%3]\n" "add%1, %0, %4..
IT/Linux Kernel
2020. 7. 10. 09:33