49 	void *source_mapping = mmap(NULL, num_pages * page_size, PROT_NONE,  in kernel_support_for_mremap_dontunmap()  local
51 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in kernel_support_for_mremap_dontunmap()
56 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in kernel_support_for_mremap_dontunmap()
65 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in kernel_support_for_mremap_dontunmap()
102 	void *source_mapping =  in mremap_dontunmap_simple()  local
105 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple()
107 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple()
111 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple()
121 	       (source_mapping, num_pages * page_size, 0) != 0,  in mremap_dontunmap_simple()
126 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple()
145 	void *source_mapping =  in mremap_dontunmap_simple_fixed()  local
148 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple_fixed()
149 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple_fixed()
152 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple_fixed()
167 	       (source_mapping, num_pages * page_size, 0) != 0,  in mremap_dontunmap_simple_fixed()
172 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_fixed()
195 	void *source_mapping =  in mremap_dontunmap_partial_mapping()  local
198 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping()
199 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_partial_mapping()
203 	    mremap(source_mapping + (5 * page_size), 5 * page_size,  in mremap_dontunmap_partial_mapping()
210 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 'a') !=  in mremap_dontunmap_partial_mapping()
213 	       (source_mapping + (5 * page_size), 5 * page_size, 0) != 0,  in mremap_dontunmap_partial_mapping()
222 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_partial_mapping()
247 	void *source_mapping =  in mremap_dontunmap_partial_mapping_overwrite()  local
250 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping_overwrite()
251 	memset(source_mapping, 'a', 5 * page_size);  in mremap_dontunmap_partial_mapping_overwrite()
261 	    mremap(source_mapping, 5 * page_size,  in mremap_dontunmap_partial_mapping_overwrite()
267 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 0) !=  in mremap_dontunmap_partial_mapping_overwrite()
281 	BUG_ON(munmap(source_mapping, 5 * page_size) == -1,  in mremap_dontunmap_partial_mapping_overwrite()