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Code Issues Releases Activity

Acquire the source pmap's lock in pmap_copy().

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This commit is contained in:
Alan Cox 2005-02-05 22:06:47 +00:00
parent 69bc96f231
commit ab42aa145d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=141370
1 changed files with 8 additions and 1 deletions
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9
sys/sparc64/sparc64/pmap.c
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@ -1475,7 +1475,13 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr,
if (dst_addr != src_addr)
return;
vm_page_lock_queues();
PMAP_LOCK(dst_pmap);
if (dst_pmap < src_pmap) {
PMAP_LOCK(dst_pmap);
PMAP_LOCK(src_pmap);
} else {
PMAP_LOCK(src_pmap);
PMAP_LOCK(dst_pmap);
}
if (len > PMAP_TSB_THRESH) {
tsb_foreach(src_pmap, dst_pmap, src_addr, src_addr + len,
pmap_copy_tte);
@ -1488,6 +1494,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr,
tlb_range_demap(dst_pmap, src_addr, src_addr + len - 1);
}
vm_page_unlock_queues();
PMAP_UNLOCK(src_pmap);
PMAP_UNLOCK(dst_pmap);
}