The patch titled Subject: selftests/vm: use a common gup_test.h has been added to the -mm tree. Its filename is selftests-vm-use-a-common-gup_testh.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/selftests-vm-use-a-common-gup_testh.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/selftests-vm-use-a-common-gup_testh.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: John Hubbard <jhubbard@xxxxxxxxxx> Subject: selftests/vm: use a common gup_test.h Avoid the need to copy-paste the gup_test ioctl commands and the struct gup_test definition, between the kernel and the user space application, by providing a new header file for these. This allows easier and safer adding of new ioctl calls, as well as reducing the overall line count. Details: The header file has to be able to compile independently, because of the arguably unfortunate way that the Makefile is written: the Makefile tries to build all of its prerequisites, when really it should be only building the .c files, and leaving the other prerequisites (LOCAL_HDRS) as pure dependencies. That Makefile limitation is probably not worth fixing, but it explains why one of the includes had to be moved into the new header file. Also: simplify the ioctl struct (struct gup_test), by deleting the unused __expansion[10] field. This sort of thing is what you might see in a stable ABI, but this low-level, kernel-developer-oriented selftests/vm system is very much not subject to ABI stability. So "expansion" and "reserved" fields are unnecessary here. Link: https://lkml.kernel.org/r/20200929212747.251804-3-jhubbard@xxxxxxxxxx Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx> Cc: Jérôme Glisse <jglisse@xxxxxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: Ralph Campbell <rcampbell@xxxxxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/gup_test.c | 17 +---------------- mm/gup_test.h | 22 ++++++++++++++++++++++ tools/testing/selftests/vm/Makefile | 2 ++ tools/testing/selftests/vm/gup_test.c | 22 +--------------------- 4 files changed, 26 insertions(+), 37 deletions(-) --- a/mm/gup_test.c~selftests-vm-use-a-common-gup_testh +++ a/mm/gup_test.c @@ -4,22 +4,7 @@ #include <linux/uaccess.h> #include <linux/ktime.h> #include <linux/debugfs.h> - -#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_test) -#define GUP_BENCHMARK _IOWR('g', 2, struct gup_test) -#define PIN_FAST_BENCHMARK _IOWR('g', 3, struct gup_test) -#define PIN_BENCHMARK _IOWR('g', 4, struct gup_test) -#define PIN_LONGTERM_BENCHMARK _IOWR('g', 5, struct gup_test) - -struct gup_test { - __u64 get_delta_usec; - __u64 put_delta_usec; - __u64 addr; - __u64 size; - __u32 nr_pages_per_call; - __u32 flags; - __u64 expansion[10]; /* For future use */ -}; +#include "../../../../mm/gup_test.h" static void put_back_pages(unsigned int cmd, struct page **pages, unsigned long nr_pages) --- /dev/null +++ a/mm/gup_test.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __GUP_TEST_H +#define __GUP_TEST_H + +#include <linux/types.h> + +#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_test) +#define GUP_BENCHMARK _IOWR('g', 2, struct gup_test) +#define PIN_FAST_BENCHMARK _IOWR('g', 3, struct gup_test) +#define PIN_BENCHMARK _IOWR('g', 4, struct gup_test) +#define PIN_LONGTERM_BENCHMARK _IOWR('g', 5, struct gup_test) + +struct gup_test { + __u64 get_delta_usec; + __u64 put_delta_usec; + __u64 addr; + __u64 size; + __u32 nr_pages_per_call; + __u32 flags; +}; + +#endif /* __GUP_TEST_H */ --- a/tools/testing/selftests/vm/gup_test.c~selftests-vm-use-a-common-gup_testh +++ a/tools/testing/selftests/vm/gup_test.c @@ -2,39 +2,19 @@ #include <stdio.h> #include <stdlib.h> #include <unistd.h> - #include <sys/ioctl.h> #include <sys/mman.h> #include <sys/prctl.h> #include <sys/stat.h> #include <sys/types.h> - -#include <linux/types.h> +#include "../../../../mm/gup_test.h" #define MB (1UL << 20) #define PAGE_SIZE sysconf(_SC_PAGESIZE) -#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_test) -#define GUP_BENCHMARK _IOWR('g', 2, struct gup_test) - -/* Similar to above, but use FOLL_PIN instead of FOLL_GET. */ -#define PIN_FAST_BENCHMARK _IOWR('g', 3, struct gup_test) -#define PIN_BENCHMARK _IOWR('g', 4, struct gup_test) -#define PIN_LONGTERM_BENCHMARK _IOWR('g', 5, struct gup_test) - /* Just the flags we need, copied from mm.h: */ #define FOLL_WRITE 0x01 /* check pte is writable */ -struct gup_test { - __u64 get_delta_usec; - __u64 put_delta_usec; - __u64 addr; - __u64 size; - __u32 nr_pages_per_call; - __u32 flags; - __u64 expansion[10]; /* For future use */ -}; - int main(int argc, char **argv) { struct gup_test gup; --- a/tools/testing/selftests/vm/Makefile~selftests-vm-use-a-common-gup_testh +++ a/tools/testing/selftests/vm/Makefile @@ -130,3 +130,5 @@ endif $(OUTPUT)/userfaultfd: LDLIBS += -lpthread $(OUTPUT)/mlock-random-test: LDLIBS += -lcap + +$(OUTPUT)/gup_test: ../../../../mm/gup_test.h _ Patches currently in -mm which might be from jhubbard@xxxxxxxxxx are mm-dump_page-rename-head_mapcount-head_compound_mapcount.patch mm-gup-protect-unpin_user_pages-against-npages==-errno.patch selftests-vm-fix-false-build-success-on-the-second-and-later-attempts.patch selftests-vm-fix-incorrect-gcc-invocation-in-some-cases.patch mm-gup_benchmark-rename-to-mm-gup_test.patch selftests-vm-use-a-common-gup_testh.patch selftests-vm-rename-run_vmtests-run_vmtestssh.patch selftests-vm-minor-cleanup-makefile-and-gup_testc.patch selftests-vm-only-some-gup_test-items-are-really-benchmarks.patch selftests-vm-gup_test-introduce-the-dump_pages-sub-test.patch selftests-vm-run_vmtestsh-update-and-clean-up-gup_test-invocation.patch selftests-vm-hmm-tests-remove-the-libhugetlbfs-dependency.patch