The OS/2 kernel will provide new DevHlps for OS/2 for SMP V2.11 as follows.
DevHlp_CreateSpinLock EQU 111 ; 6F Create a spinlock - SMP DevHlp_FreeSpinLock EQU 112 ; 70 Free a spinlock - SMP DevHlp_AcquireSpinLock EQU 113 ; 71 Acquire a spinlock - SMP DevHlp_ReleaseSpinLock EQU 114 ; 72 Release a spinlock - SMP DevHlp_PortIO EQU 118 ; 76 Port I/O DevHlp_SetIRQMask EQU 119 ; 77 Set/Unset an IRQ mask DevHlp_GetIRQMask EQU 120 ; 78 Get an IRQ mask