unmap_mapping

Name:map_mapping_pages() - Unmap pages from processes.*@mapping: The address space containing pages to be unmapped.*@start: Index of first page to be unmapped.*@nr: Number of pages to be unmapped. 0 to unmap to end of file.

Proto:void unmap_mapping_pages(struct address_space *mapping, unsigned long start, unsigned long nr, bool even_cows)

Type:void

Parameter:

Type	Parameter	Name
struct address_space *	mapping
unsigned long	start
unsigned long	nr
bool	even_cows

2845

struct zap_details details = {}

2847

Check page->mapping if set = If even_cows Then NULL Else mapping

2848

Lowest page->index to unmap = start

2849

Highest page->index to unmap = start + nr - 1

2850

If Highest page->index to unmap < Lowest page->index to unmap Then Highest page->index to unmap = ULONG_MAX

2853

i_mmap_lock_write(mapping)

2854

If Value for the false possibility is greater at compile time(!RB_EMPTY_ROOT( & rb_root)) Then unmap_mapping_range_tree( & i_mmap, & details)

2856

i_mmap_unlock_write(mapping)

**Caller**
Name	Describe
invalidate_inode_pages2_range	validate_inode_pages2_range - remove range of pages from an address_space@mapping: the address_space@start: the page offset 'from' which to invalidate@end: the page offset 'to' which to invalidate (inclusive) Any pages which are found to be mapped
unmap_mapping_range	map_mapping_range - unmap the portion of all mmaps in the specified* address_space corresponding to the specified byte range in the underlying* file
dax_insert_entry	By this point grab_mapping_entry() has ensured that we have a locked entry* of the appropriate size so we don't have to worry about downgrading PMDs to* PTEs

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Function report