46 	void *source_mapping = mmap(NULL, num_pages * page_size, PROT_NONE,  in kernel_support_for_mremap_dontunmap()  local
48 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in kernel_support_for_mremap_dontunmap()
53 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in kernel_support_for_mremap_dontunmap()
62 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in kernel_support_for_mremap_dontunmap()
99 	void *source_mapping =  in mremap_dontunmap_simple()  local
102 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple()
104 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple()
108 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple()
118 	       (source_mapping, num_pages * page_size, 0) != 0,  in mremap_dontunmap_simple()
123 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple()
138 	void *source_mapping =  in mremap_dontunmap_simple_shmem()  local
141 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple_shmem()
145 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple_shmem()
149 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple_shmem()
153 		BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_shmem()
169 	       (source_mapping, num_pages * page_size, 'a') != 0,  in mremap_dontunmap_simple_shmem()
174 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_shmem()
193 	void *source_mapping =  in mremap_dontunmap_simple_fixed()  local
196 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_simple_fixed()
197 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_simple_fixed()
200 	    mremap(source_mapping, num_pages * page_size, num_pages * page_size,  in mremap_dontunmap_simple_fixed()
215 	       (source_mapping, num_pages * page_size, 0) != 0,  in mremap_dontunmap_simple_fixed()
220 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_simple_fixed()
243 	void *source_mapping =  in mremap_dontunmap_partial_mapping()  local
246 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping()
247 	memset(source_mapping, 'a', num_pages * page_size);  in mremap_dontunmap_partial_mapping()
251 	    mremap(source_mapping + (5 * page_size), 5 * page_size,  in mremap_dontunmap_partial_mapping()
258 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 'a') !=  in mremap_dontunmap_partial_mapping()
261 	       (source_mapping + (5 * page_size), 5 * page_size, 0) != 0,  in mremap_dontunmap_partial_mapping()
270 	BUG_ON(munmap(source_mapping, num_pages * page_size) == -1,  in mremap_dontunmap_partial_mapping()
295 	void *source_mapping =  in mremap_dontunmap_partial_mapping_overwrite()  local
298 	BUG_ON(source_mapping == MAP_FAILED, "mmap");  in mremap_dontunmap_partial_mapping_overwrite()
299 	memset(source_mapping, 'a', 5 * page_size);  in mremap_dontunmap_partial_mapping_overwrite()
309 	    mremap(source_mapping, 5 * page_size,  in mremap_dontunmap_partial_mapping_overwrite()
315 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 0) !=  in mremap_dontunmap_partial_mapping_overwrite()
329 	BUG_ON(munmap(source_mapping, 5 * page_size) == -1,  in mremap_dontunmap_partial_mapping_overwrite()