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vm_page_protect (9)
  • >> vm_page_protect (9) ( FreeBSD man: Ядро )

  • BSD mandoc
     

    NAME

    
    
    vm_page_protect
    
     - lower a page's protection
    
     
    

    SYNOPSIS

       #include <sys/param.h>
       #include <vm/vm.h>
       #include <vm/vm_page.h>
    void vm_page_protect (vm_page_t mem int prot);
     

    DESCRIPTION

    The vm_page_protect ();
    function lowers a page's protection. The protection is never raised by this function; therefore, if the page is already at VM_PROT_NONE the function does nothing.

    Its arguments are:

    Fa mem
    The page whose protection is lowered.
    Fa prot
    The protection the page should be reduced to. If VM_PROT_NONE is specified, then the PG_WRITABLE and PG_MAPPED flags are cleared and the pmap_page's protection is set to VM_PROT_NONE If VM_PROT_READ is specified, then the PG_WRITABLE flag is cleared and the pmap_page's protection is set to VM_PROT_READ

    Higher protection requests are ignored.  

    AUTHORS

    This manual page was written by An Chad David Aq davidc@acns.ab.ca .


     

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