55 	void *dest_mapping =  in kernel_support_for_mremap_dontunmap()  local
58 	if (dest_mapping == MAP_FAILED) {  in kernel_support_for_mremap_dontunmap()
61 		BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,  in kernel_support_for_mremap_dontunmap()
110 	void *dest_mapping =  in mremap_dontunmap_simple()  local
113 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");  in mremap_dontunmap_simple()
118 	       (dest_mapping, num_pages * page_size, 'a') != 0,  in mremap_dontunmap_simple()
124 	BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple()
139 	void *dest_mapping =  in mremap_dontunmap_simple_fixed()  local
142 	BUG_ON(dest_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple_fixed()
143 	memset(dest_mapping, 'X', num_pages * page_size);  in mremap_dontunmap_simple_fixed()
154 		   dest_mapping);  in mremap_dontunmap_simple_fixed()
156 	BUG_ON(remapped_mapping != dest_mapping,  in mremap_dontunmap_simple_fixed()
162 	       (dest_mapping, num_pages * page_size, 'a') != 0,  in mremap_dontunmap_simple_fixed()
170 	BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_fixed()
202 	void *dest_mapping =  in mremap_dontunmap_partial_mapping()  local
206 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");  in mremap_dontunmap_partial_mapping()
217 	BUG_ON(check_region_contains_byte(dest_mapping, 5 * page_size, 'a') !=  in mremap_dontunmap_partial_mapping()
220 	BUG_ON(munmap(dest_mapping, 5 * page_size) == -1,  in mremap_dontunmap_partial_mapping()
253 	void *dest_mapping =  in mremap_dontunmap_partial_mapping_overwrite()  local
256 	BUG_ON(dest_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping_overwrite()
257 	memset(dest_mapping, 'X', 10 * page_size);  in mremap_dontunmap_partial_mapping_overwrite()
263 		   MREMAP_DONTUNMAP | MREMAP_MAYMOVE | MREMAP_FIXED, dest_mapping);  in mremap_dontunmap_partial_mapping_overwrite()
264 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");  in mremap_dontunmap_partial_mapping_overwrite()
265 	BUG_ON(dest_mapping != remapped_mapping, "expected to remap to dest_mapping");  in mremap_dontunmap_partial_mapping_overwrite()
271 	BUG_ON(check_region_contains_byte(dest_mapping, 5 * page_size, 'a') != 0,  in mremap_dontunmap_partial_mapping_overwrite()
275 	BUG_ON(check_region_contains_byte(dest_mapping + (5 * page_size),  in mremap_dontunmap_partial_mapping_overwrite()
279 	BUG_ON(munmap(dest_mapping, 10 * page_size) == -1,  in mremap_dontunmap_partial_mapping_overwrite()