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powerpc/booke: It helps to set variables before using them

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Actually set the source and destination VA's before using them.  Fixes a
bizarre panic on 32-bit Book-E.  Not sure why this wasn't caught by the
compiler.
This commit is contained in:
Justin Hibbits 2019-05-23 03:40:48 +00:00
parent 73f1145140
commit 72e58595b1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348146
1 changed files with 3 additions and 2 deletions
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5
sys/powerpc/booke/pmap.c
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@ -3043,11 +3043,12 @@ mmu_booke_copy_page(mmu_t mmu, vm_page_t sm, vm_page_t dm)
dva = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(dm));
memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE);
#else
sva = copy_page_src_va;
dva = copy_page_dst_va;
mtx_lock(&copy_page_mutex);
mmu_booke_kenter(mmu, sva, VM_PAGE_TO_PHYS(sm));
mmu_booke_kenter(mmu, dva, VM_PAGE_TO_PHYS(dm));
sva = copy_page_src_va;
dva = copy_page_dst_va;
memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE);