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Optimize out VM_PHYSMEM_PTR_SWAP on architectures that have VM_PHYSSEG_MAX = 1

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(hard to address two different array entries there w/o invoking undefined
behaviour, and newer compilers complain about it).
This commit is contained in:
martin 2013-10-25 14:30:21 +00:00
parent a07180c32d
commit dbe78631e3
1 changed files with 5 additions and 1 deletions
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6
sys/uvm/uvm_page.h
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_page.h,v 1.75 2012/05/05 20:45:35 rmind Exp $ */
/* $NetBSD: uvm_page.h,v 1.76 2013/10/25 14:30:21 martin Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -290,8 +290,12 @@ extern bool vm_page_zero_enable;
*/
#define VM_PHYSMEM_PTR(i) (&vm_physmem[i])
#if VM_PHYSSEG_MAX == 1
#define VM_PHYSMEM_PTR_SWAP(i, j) /* impossible */
#else
#define VM_PHYSMEM_PTR_SWAP(i, j) \
do { vm_physmem[(i)] = vm_physmem[(j)]; } while (0)
#endif
extern struct vm_physseg vm_physmem[VM_PHYSSEG_MAX];
extern int vm_nphysseg;