Alan Cox 60169c88d9 Delay the call to crhold() in vm_map_insert() until we know that we won't
have to undo it by calling crfree().  This reduces the total number of calls
by vm_map_insert() to crhold() and crfree() by 45% in my tests.

Eliminate an unnecessary variable from vm_map_insert().

Reviewed by:	kib
Tested by:	pho
2014-06-26 16:04:03 +00:00
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