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()
141 	void *source_mapping =  in mremap_dontunmap_simple_shmem()  local
144 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple_shmem()
148 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple_shmem()
152 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple_shmem()
156 		BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_shmem()
172 	       (source_mapping, num_pages * page_size, 'a') != 0,  in mremap_dontunmap_simple_shmem()
177 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_shmem()
196 	void *source_mapping =  in mremap_dontunmap_simple_fixed()  local
199 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple_fixed()
200 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple_fixed()
203 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple_fixed()
218 	       (source_mapping, num_pages * page_size, 0) != 0,  in mremap_dontunmap_simple_fixed()
223 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_fixed()
246 	void *source_mapping =  in mremap_dontunmap_partial_mapping()  local
249 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping()
250 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_partial_mapping()
254 	    mremap(source_mapping + (5 * page_size), 5 * page_size,  in mremap_dontunmap_partial_mapping()
261 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 'a') !=  in mremap_dontunmap_partial_mapping()
264 	       (source_mapping + (5 * page_size), 5 * page_size, 0) != 0,  in mremap_dontunmap_partial_mapping()
273 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_partial_mapping()
298 	void *source_mapping =  in mremap_dontunmap_partial_mapping_overwrite()  local
301 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping_overwrite()
302 	memset(source_mapping, 'a', 5 * page_size);  in mremap_dontunmap_partial_mapping_overwrite()
312 	    mremap(source_mapping, 5 * page_size,  in mremap_dontunmap_partial_mapping_overwrite()
318 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 0) !=  in mremap_dontunmap_partial_mapping_overwrite()
332 	BUG_ON(munmap(source_mapping, 5 * page_size) == -1,  in mremap_dontunmap_partial_mapping_overwrite()