ALPHA_PSL_IPL_HIGH
(void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH);
(void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH);
#define IPL_IPI ALPHA_PSL_IPL_HIGH /* occur on _CLOCK, though */
#define IPL_HIGH ALPHA_PSL_IPL_HIGH
s = _alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH)