| SPLRAISEIPL(9) | Kernel Developer's Manual | SPLRAISEIPL(9) | 
splraiseipl —
#include <sys/intr.h>
int
  
  splraiseipl(ipl_cookie_t
    icookie);
splraiseipl() raises the system priority level to the
  level specified by icookie.
  icookie should be a value returned by
  makeiplcookie().
In general, device drivers should not make use of this interface. To ensure correct synchronization, device drivers should use the condvar(9), mutex(9), and rwlock(9) interfaces.
See the spl(9) manual page for a description of interrupt priority levels.
splraiseipl() returns saved priority level which can be
  used for splx().
s = splraiseipl(makeiplcookie(IPL_VM));
s = splvm();
Because makeiplcookie() can be slow and is
    not expected to be used in a performance critical path, it's better to do it
    beforehand.
	initialization_code(ipl_t ipl)
	{
		ourcookie = makeiplcookie(ipl);
	}
	performance_critical_code()
	{
		int s;
		s = splraiseipl(ourcookie);
		do_something();
		splx(s);
	}
| July 9, 2015 | NetBSD 9.3 |