selftests/vm: rename selftests/vm to selftests/mm

Rename selftets/vm to selftests/mm for being more consistent with the
code, documentation, and tools directories, and won't be confused with
virtual machines.

[sj@kernel.org: convert missing vm->mm changes]
  Link: https://lkml.kernel.org/r/20230107230643.252273-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20230103180754.129637-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 0 insertions, 151 deletions

diff --git a/tools/testing/selftests/vm/vm_util.c b/tools/testing/selftests/vm/vm_util.c
deleted file mode 100644
index 40e795624ff3..000000000000
--- a/tools/testing/selftests/vm/vm_util.c
+++ /dev/null
@@ -1,151 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <string.h>
-#include <fcntl.h>
-#include "../kselftest.h"
-#include "vm_util.h"
-
-#define PMD_SIZE_FILE_PATH "/sys/kernel/mm/transparent_hugepage/hpage_pmd_size"
-#define SMAP_FILE_PATH "/proc/self/smaps"
-#define MAX_LINE_LENGTH 500
-
-uint64_t pagemap_get_entry(int fd, char *start)
-{
-	const unsigned long pfn = (unsigned long)start / getpagesize();
-	uint64_t entry;
-	int ret;
-
-	ret = pread(fd, &entry, sizeof(entry), pfn * sizeof(entry));
-	if (ret != sizeof(entry))
-		ksft_exit_fail_msg("reading pagemap failed\n");
-	return entry;
-}
-
-bool pagemap_is_softdirty(int fd, char *start)
-{
-	uint64_t entry = pagemap_get_entry(fd, start);
-
-	// Check if dirty bit (55th bit) is set
-	return entry & 0x0080000000000000ull;
-}
-
-bool pagemap_is_swapped(int fd, char *start)
-{
-	uint64_t entry = pagemap_get_entry(fd, start);
-
-	return entry & 0x4000000000000000ull;
-}
-
-bool pagemap_is_populated(int fd, char *start)
-{
-	uint64_t entry = pagemap_get_entry(fd, start);
-
-	/* Present or swapped. */
-	return entry & 0xc000000000000000ull;
-}
-
-unsigned long pagemap_get_pfn(int fd, char *start)
-{
-	uint64_t entry = pagemap_get_entry(fd, start);
-
-	/* If present (63th bit), PFN is at bit 0 -- 54. */
-	if (entry & 0x8000000000000000ull)
-		return entry & 0x007fffffffffffffull;
-	return -1ul;
-}
-
-void clear_softdirty(void)
-{
-	int ret;
-	const char *ctrl = "4";
-	int fd = open("/proc/self/clear_refs", O_WRONLY);
-
-	if (fd < 0)
-		ksft_exit_fail_msg("opening clear_refs failed\n");
-	ret = write(fd, ctrl, strlen(ctrl));
-	close(fd);
-	if (ret != strlen(ctrl))
-		ksft_exit_fail_msg("writing clear_refs failed\n");
-}
-
-bool check_for_pattern(FILE *fp, const char *pattern, char *buf, size_t len)
-{
-	while (fgets(buf, len, fp)) {
-		if (!strncmp(buf, pattern, strlen(pattern)))
-			return true;
-	}
-	return false;
-}
-
-uint64_t read_pmd_pagesize(void)
-{
-	int fd;
-	char buf[20];
-	ssize_t num_read;
-
-	fd = open(PMD_SIZE_FILE_PATH, O_RDONLY);
-	if (fd == -1)
-		ksft_exit_fail_msg("Open hpage_pmd_size failed\n");
-
-	num_read = read(fd, buf, 19);
-	if (num_read < 1) {
-		close(fd);
-		ksft_exit_fail_msg("Read hpage_pmd_size failed\n");
-	}
-	buf[num_read] = '\0';
-	close(fd);
-
-	return strtoul(buf, NULL, 10);
-}
-
-bool __check_huge(void *addr, char *pattern, int nr_hpages,
-		  uint64_t hpage_size)
-{
-	uint64_t thp = -1;
-	int ret;
-	FILE *fp;
-	char buffer[MAX_LINE_LENGTH];
-	char addr_pattern[MAX_LINE_LENGTH];
-
-	ret = snprintf(addr_pattern, MAX_LINE_LENGTH, "%08lx-",
-		       (unsigned long) addr);
-	if (ret >= MAX_LINE_LENGTH)
-		ksft_exit_fail_msg("%s: Pattern is too long\n", __func__);
-
-	fp = fopen(SMAP_FILE_PATH, "r");
-	if (!fp)
-		ksft_exit_fail_msg("%s: Failed to open file %s\n", __func__, SMAP_FILE_PATH);
-
-	if (!check_for_pattern(fp, addr_pattern, buffer, sizeof(buffer)))
-		goto err_out;
-
-	/*
-	 * Fetch the pattern in the same block and check the number of
-	 * hugepages.
-	 */
-	if (!check_for_pattern(fp, pattern, buffer, sizeof(buffer)))
-		goto err_out;
-
-	snprintf(addr_pattern, MAX_LINE_LENGTH, "%s%%9ld kB", pattern);
-
-	if (sscanf(buffer, addr_pattern, &thp) != 1)
-		ksft_exit_fail_msg("Reading smap error\n");
-
-err_out:
-	fclose(fp);
-	return thp == (nr_hpages * (hpage_size >> 10));
-}
-
-bool check_huge_anon(void *addr, int nr_hpages, uint64_t hpage_size)
-{
-	return __check_huge(addr, "AnonHugePages: ", nr_hpages, hpage_size);
-}
-
-bool check_huge_file(void *addr, int nr_hpages, uint64_t hpage_size)
-{
-	return __check_huge(addr, "FilePmdMapped:", nr_hpages, hpage_size);
-}
-
-bool check_huge_shmem(void *addr, int nr_hpages, uint64_t hpage_size)
-{
-	return __check_huge(addr, "ShmemPmdMapped:", nr_hpages, hpage_size);
-}