COS spinlock()

RAM:FFF075BC spinlock:                               # CODE XREF: sub_FFE0179C+DCp
RAM:FFF075BC                                         # sub_FFE804EC+1A8p ...
RAM:FFF075BC                 mfspr   r4, LR
RAM:FFF075C0
RAM:FFF075C0 loc_FFF075C0:                           # CODE XREF: spinlock+Cj
RAM:FFF075C0                                         # spinlock+18j
RAM:FFF075C0                 lwarx     r5, r0, r3
RAM:FFF075C4                 cmpwi     r5, 0
RAM:FFF075C8                 bne       loc_FFF075C0
RAM:FFF075CC                 dcbst     r0, r3
RAM:FFF075D0                 stwcx.    r4, r0, r3
RAM:FFF075D4                 bne-      loc_FFF075C0
RAM:FFF075D8                 isync
RAM:FFF075DC                 blr
RAM:FFF075DC # End of function spinlock