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Assert Giant is held for the device pager alloc and getpages methods since

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we call the mmap method of the cdevsw of the device we are mmap'ing.
This commit is contained in:
John Baldwin 2001-05-23 22:27:52 +00:00
parent ce70e0a964
commit 6d556da5c2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=77087
1 changed files with 3 additions and 3 deletions
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6
sys/vm/device_pager.c
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@ -106,6 +106,7 @@ dev_pager_alloc(void *handle, vm_ooffset_t size, vm_prot_t prot, vm_ooffset_t fo
unsigned int npages;
vm_offset_t off;
mtx_assert(&Giant, MA_OWNED);
/*
* Make sure this device can be mapped.
*/
@ -198,10 +199,11 @@ dev_pager_getpages(object, m, count, reqpage)
vm_offset_t paddr;
vm_page_t page;
dev_t dev;
int i, s;
int i;
d_mmap_t *mapfunc;
int prot;
mtx_assert(&Giant, MA_OWNED);
dev = object->handle;
offset = m[reqpage]->pindex;
prot = PROT_READ; /* XXX should pass in? */
@ -221,9 +223,7 @@ dev_pager_getpages(object, m, count, reqpage)
for (i = 0; i < count; i++) {
vm_page_free(m[i]);
}
s = splhigh();
vm_page_insert(page, object, offset);
splx(s);
return (VM_PAGER_OK);
}