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Avoid an unnecessary calculation: there is no need to subtract

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`firstaddr' from `v' if we know that the former equals zero.
This commit is contained in:
Robert Drehmel 2003-07-13 21:02:11 +00:00
parent 533d8562e4
commit 857961d925
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=117519
1 changed files with 1 additions and 1 deletions
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sys/vm/vm_init.c
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@ -172,7 +172,7 @@ vm_ksubmap_init(struct kva_md_info *kmi)
* End of first pass, size has been calculated so allocate memory
*/
if (firstaddr == 0) {
size = (vm_size_t)((char *)v - firstaddr);
size = (vm_size_t)v;
firstaddr = kmem_alloc(kernel_map, round_page(size));
if (firstaddr == 0)
panic("startup: no room for tables");