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o Remove GIANT_REQUIRED from vm_map_lookup() and vm_map_lookup_done().

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o Acquire and release Giant around vm_map_lookup()'s call
   to vm_object_shadow().
This commit is contained in:
Alan Cox 2002-05-05 05:36:28 +00:00
parent 5eb40323b0
commit 15fdd586e3
1 changed files with 2 additions and 2 deletions
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4
sys/vm/vm_map.c
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@ -2763,7 +2763,6 @@ vm_map_lookup(vm_map_t *var_map, /* IN/OUT */
vm_prot_t prot;
vm_prot_t fault_type = fault_typea;
GIANT_REQUIRED;
RetryLookup:;
/*
* Lookup the faulting address.
@ -2857,10 +2856,12 @@ RetryLookup:;
*/
if (vm_map_lock_upgrade(map))
goto RetryLookup;
mtx_lock(&Giant);
vm_object_shadow(
&entry->object.vm_object,
&entry->offset,
atop(entry->end - entry->start));
mtx_unlock(&Giant);
entry->eflags &= ~MAP_ENTRY_NEEDS_COPY;
vm_map_lock_downgrade(map);
} else {
@ -2913,7 +2914,6 @@ vm_map_lookup_done(vm_map_t map, vm_map_entry_t entry)
/*
* Unlock the main-level map
*/
GIANT_REQUIRED;
vm_map_unlock_read(map);
}