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pa isn't needed in the uvmunmap() loop

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Robert Morris 2020-08-13 08:04:56 -04:00 committed by Frans Kaashoek
parent 56e7cebdb9
commit e283514ad0
1 changed files with 1 additions and 3 deletions
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4
kernel/vm.c
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@ -175,7 +175,6 @@ uvmunmap(pagetable_t pagetable, uint64 va, uint64 size, int do_free)
{
uint64 a, last;
pte_t *pte;
uint64 pa;
a = PGROUNDDOWN(va);
last = PGROUNDDOWN(va + size - 1);
@ -189,14 +188,13 @@ uvmunmap(pagetable_t pagetable, uint64 va, uint64 size, int do_free)
if(PTE_FLAGS(*pte) == PTE_V)
panic("uvmunmap: not a leaf");
if(do_free){
pa = PTE2PA(*pte);
uint64 pa = PTE2PA(*pte);
kfree((void*)pa);
}
*pte = 0;
if(a == last)
break;
a += PGSIZE;
pa += PGSIZE;
}
}