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memory driver: munmap() imgrd after first close.

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(that munmap() range not supported yet by vm.)
This commit is contained in:
Ben Gras 2011-02-10 15:39:56 +00:00
parent 9ef5859996
commit 3beb81a5d0
1 changed files with 23 additions and 0 deletions
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23
drivers/memory/memory.c
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@ -20,6 +20,7 @@
#include <sys/ioc_memory.h>
#include <minix/ds.h>
#include <minix/vm.h>
#include <machine/param.h>
#include <sys/mman.h>
#include "kernel/const.h"
#include "kernel/config.h"
@ -393,6 +394,28 @@ message *m_ptr;
}
openct[m_device]--;
/* Special case: free initial ramdisk after it's been unmounted once. */
if(m_device == IMGRD_DEV && openct[m_device] == 0 && m_vaddrs[IMGRD_DEV]) {
vir_bytes vaddr, vlen;
vaddr = m_vaddrs[IMGRD_DEV];
vlen = imgrd_size;
/* Align `inwards' so as to not unmap more than the initial
* ramdisk image.
*/
if(vaddr % PAGE_SIZE) {
vir_bytes o = PAGE_SIZE - (vaddr % PAGE_SIZE);
vlen -= o;
vaddr += o;
}
if(vlen % PAGE_SIZE) {
vlen -= vlen % PAGE_SIZE;
}
munmap((void *) vaddr, vlen);
m_geom[IMGRD_DEV].dv_base= cvul64(0);
m_geom[IMGRD_DEV].dv_size= cvul64(0);
m_vaddrs[IMGRD_DEV] = 0;
}
return(OK);
}