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Fixed the type mismatch in check for the bogus mmap function `nullop'.

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The test should never succeed and should go away.  Temporarily print
a warning if it does succeed.
This commit is contained in:
Bruce Evans 1995-12-03 18:59:55 +00:00
parent 6fae63d840
commit f31d402c5a
1 changed files with 5 additions and 3 deletions
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8
sys/vm/device_pager.c
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@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)device_pager.c 8.1 (Berkeley) 6/11/93
* $Id: device_pager.c,v 1.13 1995/11/06 00:36:19 bde Exp $
* $Id: device_pager.c,v 1.14 1995/12/03 12:18:30 bde Exp $
*/
#include <sys/param.h>
@ -94,8 +94,10 @@ dev_pager_alloc(handle, size, prot, foff)
*/
dev = (dev_t) (u_long) handle;
mapfunc = cdevsw[major(dev)].d_mmap;
if (mapfunc == NULL || mapfunc == nullop)
if (mapfunc == NULL || mapfunc == (d_mmap_t *)nullop) {
printf("obsolete map function %p\n", (void *)mapfunc);
return (NULL);
}
/*
* Offset should be page aligned.
@ -187,7 +189,7 @@ dev_pager_getpages(object, m, count, reqpage)
prot = PROT_READ; /* XXX should pass in? */
mapfunc = cdevsw[major(dev)].d_mmap;
if (mapfunc == NULL || mapfunc == nullop)
if (mapfunc == NULL || mapfunc == (d_mmap_t *)nullop)
panic("dev_pager_getpage: no map function");
paddr = pmap_phys_address((*mapfunc) ((dev_t) dev, (int) offset, prot));