selftests/mm/gup_longterm.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * GUP long-term page pinning tests.
54 	 * R/W long-term pinning. For these filesystems, we can be fairly sure  in fs_is_unknown()
121 	/* Fault in the page such that GUP-fast can pin it directly. */  in do_test()
129 		 * long-term R/O pinning by mapping the page R/O.  in do_test()
156 		 * expected to work. Otherwise, we expect long-term R/W pinning  in do_test()
182 		 * TODO: if the kernel ever supports long-term R/W pinning on  in do_test()
209 		 * Register the range as a fixed buffer. This will FOLL_WRITE |  in do_test()
210 		 * FOLL_PIN | FOLL_LONGTERM the range.  in do_test()
257 	close(fd);  in run_with_memfd()
276 		goto close;  in run_with_tmpfile()
280 close:  in run_with_tmpfile()
299 		goto close;  in run_with_local_tmpfile()
303 close:  in run_with_local_tmpfile()
304 	close(fd);  in run_with_local_tmpfile()
325 	close(fd);  in run_with_memfd_hugetlb()
391 		"R/W longterm GUP-fast pin in MAP_SHARED file mapping",
399 		"R/O longterm GUP-fast pin in MAP_SHARED file mapping",
407 		"R/W longterm GUP-fast pin in MAP_PRIVATE file mapping",
415 		"R/O longterm GUP-fast pin in MAP_PRIVATE file mapping",
434 	run_with_memfd(test_case->fn, test_case->desc);  in run_test_case()
435 	run_with_tmpfile(test_case->fn, test_case->desc);  in run_test_case()
436 	run_with_local_tmpfile(test_case->fn, test_case->desc);  in run_test_case()
438 		run_with_memfd_hugetlb(test_case->fn, test_case->desc,  in run_test_case()