vunmap(9) [suse man page]

VUNMAP(9)						    Memory Management in Linux							 VUNMAP(9)

NAME

       vunmap - release virtual mapping obtained by vmap

SYNOPSIS

       void vunmap(const void * addr);

ARGUMENTS

       addr
	   memory base address

DESCRIPTION

       Free the virtually contiguous memory area starting at addr, which was created from the page array passed to vmap.

       Must not be called in interrupt context.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010								 VUNMAP(9)

VSLOCK(9)						   BSD Kernel Developer's Manual						 VSLOCK(9)

NAME

     vslock, vsunlock -- lock/unlock user space addresses in memory

SYNOPSIS

     #include <sys/param.h>
     #include <sys/proc.h>
     #include <vm/vm.h>
     #include <vm/vm_extern.h>

     int
     vslock(void *addr, size_t len);

     void
     vsunlock(void *addr, size_t len);

DESCRIPTION

     The vslock() and vsunlock() functions respectively lock and unlock a range of addresses belonging to the currently running process into mem-
     ory.  The actual amount of memory locked is a multiple of the machine's page size.  The starting page number is computed by truncating addr
     to the nearest preceding page boundary, and by rounding up addr + len to the next page boundary.  The process context to use for this opera-
     tion is taken from the global variable curproc.

RETURN VALUES

     The vslock() function will return 0 on success, otherwise it will return one of the errors listed below.

ERRORS

     The vslock() function will fail if:

     [EINVAL]		The addr and len parameters specify a memory range that wraps around the end of the machine address space.

     [ENOMEM]		The size of the specified address range exceeds the system limit on locked memory.

     [ENOMEM]		Locking the requested address range would cause the process to exceed its per-process locked memory limit.

     [EFAULT]		Some portion of the indicated address range is not allocated.  There was an error faulting/mapping a page.

BSD
								  August 10, 2004							       BSD