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Code Issues Releases Activity

Add pmap locking to pmap_emulate_reference(). Remove unused and once-used

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variables.

Tested by:	kensmith@
This commit is contained in:
Alan Cox 2004-07-08 07:44:55 +00:00
parent 19ba8e3164
commit c9e95bb1cb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131793
1 changed files with 8 additions and 8 deletions
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16
sys/alpha/alpha/pmap.c
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@ -2480,9 +2480,8 @@ pmap_clear_reference(vm_page_t m)
void
pmap_emulate_reference(struct vmspace *vm, vm_offset_t v, int user, int write)
{
pmap_t pmap;
pt_entry_t faultoff, *pte;
vm_offset_t pa;
int user_addr;
/*
* Convert process and virtual address to physical address.
@ -2490,12 +2489,14 @@ pmap_emulate_reference(struct vmspace *vm, vm_offset_t v, int user, int write)
if (v >= VM_MIN_KERNEL_ADDRESS) {
if (user)
panic("pmap_emulate_reference: user ref to kernel");
pmap = kernel_pmap;
PMAP_LOCK(pmap);
pte = vtopte(v);
user_addr = 0;
} else {
KASSERT(vm != NULL, ("pmap_emulate_reference: bad vmspace"));
pte = pmap_lev3pte(vm->vm_map.pmap, v);
user_addr = 1;
pmap = &vm->vm_pmap;
PMAP_LOCK(pmap);
pte = pmap_lev3pte(pmap, v);
}
#ifdef DEBUG /* These checks are more expensive */
if (!pmap_pte_v(pte))
@ -2520,11 +2521,9 @@ pmap_emulate_reference(struct vmspace *vm, vm_offset_t v, int user, int write)
#endif
/* Other diagnostics? */
#endif
pa = pmap_pte_pa(pte);
KASSERT((*pte & PG_MANAGED) != 0,
("pmap_emulate_reference(%p, 0x%lx, %d, %d): pa 0x%lx not managed",
curthread, v, user, write, pa));
curthread, v, user, write, pmap_pte_pa(pte)));
/*
* Twiddle the appropriate bits to reflect the reference
@ -2542,6 +2541,7 @@ pmap_emulate_reference(struct vmspace *vm, vm_offset_t v, int user, int write)
*pte = (*pte & ~faultoff);
ALPHA_TBIS(v);
PMAP_UNLOCK(pmap);
}
/*