unuse_vma

Name:unuse_vma

Proto:static int unuse_vma(struct vm_area_struct *vma, unsigned int type, bool frontswap, unsigned long *fs_pages_to_unuse)

Type:int

Parameter:

Type	Parameter	Name
struct vm_area_struct *	vma
unsigned int	type
bool	frontswap
unsigned long *	fs_pages_to_unuse

2051

addr = Our start address within vm_mm.

2052

end = The first byte after our end addresswithin vm_mm.

2054

pgd = a shortcut to get a pgd_t in a given mm(The address space we belong to. , addr)

2055

Do

2056

next = When walking page tables, get the address of the next boundary,* or the end address of the range if that comes earlier. Although no* vma end wraps to 0, rounded up __boundary may wrap to 0 throughout.(addr, end)

2057

If pgd_none_or_clear_bad(pgd) Then Continue

2059

ret = unuse_p4d_range(vma, pgd, addr, next, type, frontswap, fs_pages_to_unuse)

2061

If ret Then Return ret

2063

When pgd++, addr = next , addr != end cycle

2064

Return 0

**Caller**
Name	Describe
unuse_mm

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