Subject: [PATCH] time: Rename udelay_test.c to test_udelay.c

From: John Stultz <[email-masked]>
Date: Mon, 4 Aug 2014 11:35:40 -0700

Kees requested that this test module be renamed for consistency sake,
so this patch renames the udelay_test.c file (recently added to
tip/timers/core for 3.17) to test_udelay.c

Cc: Kees Cook <[email-masked]>
Cc: Greg KH <[email-masked]>
Cc: Stephen Rothwell <[email-masked]>
Cc: Thomas Gleixner <[email-masked]>
Cc: Ingo Molnar <[email-masked]>
Cc: Linux-Next <[email-masked]>
Cc: David Riley <[email-masked]>
Signed-off-by: John Stultz <[email-masked]>
---
 kernel/time/Makefile      |   2 +-
 kernel/time/test_udelay.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++
 kernel/time/udelay_test.c | 168 ----------------------------------------------
 3 files changed, 169 insertions(+), 169 deletions(-)
 create mode 100644 kernel/time/test_udelay.c
 delete mode 100644 kernel/time/udelay_test.c

diff --git a/kernel/time/Makefile b/kernel/time/Makefile
index 7347426..f622cf2 100644
--- a/kernel/time/Makefile
+++ b/kernel/time/Makefile
@@ -13,7 +13,7 @@ obj-$(CONFIG_TICK_ONESHOT)			+= tick-oneshot.o
 obj-$(CONFIG_TICK_ONESHOT)			+= tick-sched.o
 obj-$(CONFIG_TIMER_STATS)			+= timer_stats.o
 obj-$(CONFIG_DEBUG_FS)				+= timekeeping_debug.o
-obj-$(CONFIG_TEST_UDELAY)			+= udelay_test.o
+obj-$(CONFIG_TEST_UDELAY)			+= test_udelay.o
 
 $(obj)/time.o: $(obj)/timeconst.h
 
diff --git a/kernel/time/test_udelay.c b/kernel/time/test_udelay.c
new file mode 100644
index 0000000..e622ba3
--- /dev/null
+++ b/kernel/time/test_udelay.c
@@ -0,0 +1,168 @@
+/*
+ * udelay() test kernel module
+ *
+ * Test is executed by writing and reading to /sys/kernel/debug/udelay_test
+ * Tests are configured by writing: USECS ITERATIONS
+ * Tests are executed by reading from the same file.
+ * Specifying usecs of 0 or negative values will run multiples tests.
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/ktime.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+
+#define DEFAULT_ITERATIONS 100
+
+#define DEBUGFS_FILENAME "udelay_test"
+
+static DEFINE_MUTEX(udelay_test_lock);
+static struct dentry *udelay_test_debugfs_file;
+static int udelay_test_usecs;
+static int udelay_test_iterations = DEFAULT_ITERATIONS;
+
+static int udelay_test_single(struct seq_file *s, int usecs, uint32_t iters)
+{
+	int min = 0, max = 0, fail_count = 0;
+	uint64_t sum = 0;
+	uint64_t avg;
+	int i;
+	/* Allow udelay to be up to 0.5% fast */
+	int allowed_error_ns = usecs * 5;
+
+	for (i = 0; i < iters; ++i) {
+		struct timespec ts1, ts2;
+		int time_passed;
+
+		ktime_get_ts(&ts1);
+		udelay(usecs);
+		ktime_get_ts(&ts2);
+		time_passed = timespec_to_ns(&ts2) - timespec_to_ns(&ts1);
+
+		if (i == 0 || time_passed < min)
+			min = time_passed;
+		if (i == 0 || time_passed > max)
+			max = time_passed;
+		if ((time_passed + allowed_error_ns) / 1000 < usecs)
+			++fail_count;
+		WARN_ON(time_passed < 0);
+		sum += time_passed;
+	}
+
+	avg = sum;
+	do_div(avg, iters);
+	seq_printf(s, "%d usecs x %d: exp=%d allowed=%d min=%d avg=%lld max=%d",
+			usecs, iters, usecs * 1000,
+			(usecs * 1000) - allowed_error_ns, min, avg, max);
+	if (fail_count)
+		seq_printf(s, " FAIL=%d", fail_count);
+	seq_puts(s, "\n");
+
+	return 0;
+}
+
+static int udelay_test_show(struct seq_file *s, void *v)
+{
+	int usecs;
+	int iters;
+	int ret = 0;
+
+	mutex_lock(&udelay_test_lock);
+	usecs = udelay_test_usecs;
+	iters = udelay_test_iterations;
+	mutex_unlock(&udelay_test_lock);
+
+	if (usecs > 0 && iters > 0) {
+		return udelay_test_single(s, usecs, iters);
+	} else if (usecs == 0) {
+		struct timespec ts;
+
+		ktime_get_ts(&ts);
+		seq_printf(s, "udelay() test (lpj=%ld kt=%ld.%09ld)\n",
+				loops_per_jiffy, ts.tv_sec, ts.tv_nsec);
+		seq_puts(s, "usage:\n");
+		seq_puts(s, "echo USECS [ITERS] > " DEBUGFS_FILENAME "\n");
+		seq_puts(s, "cat " DEBUGFS_FILENAME "\n");
+	}
+
+	return ret;
+}
+
+static int udelay_test_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, udelay_test_show, inode->i_private);
+}
+
+static ssize_t udelay_test_write(struct file *file, const char __user *buf,
+		size_t count, loff_t *pos)
+{
+	char lbuf[32];
+	int ret;
+	int usecs;
+	int iters;
+
+	if (count >= sizeof(lbuf))
+		return -EINVAL;
+
+	if (copy_from_user(lbuf, buf, count))
+		return -EFAULT;
+	lbuf[count] = '\0';
+
+	ret = sscanf(lbuf, "%d %d", &usecs, &iters);
+	if (ret < 1)
+		return -EINVAL;
+	else if (ret < 2)
+		iters = DEFAULT_ITERATIONS;
+
+	mutex_lock(&udelay_test_lock);
+	udelay_test_usecs = usecs;
+	udelay_test_iterations = iters;
+	mutex_unlock(&udelay_test_lock);
+
+	return count;
+}
+
+static const struct file_operations udelay_test_debugfs_ops = {
+	.owner = THIS_MODULE,
+	.open = udelay_test_open,
+	.read = seq_read,
+	.write = udelay_test_write,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static int __init udelay_test_init(void)
+{
+	mutex_lock(&udelay_test_lock);
+	udelay_test_debugfs_file = debugfs_create_file(DEBUGFS_FILENAME,
+			S_IRUSR, NULL, NULL, &udelay_test_debugfs_ops);
+	mutex_unlock(&udelay_test_lock);
+
+	return 0;
+}
+
+module_init(udelay_test_init);
+
+static void __exit udelay_test_exit(void)
+{
+	mutex_lock(&udelay_test_lock);
+	debugfs_remove(udelay_test_debugfs_file);
+	mutex_unlock(&udelay_test_lock);
+}
+
+module_exit(udelay_test_exit);
+
+MODULE_AUTHOR("David Riley <[email-masked]>");
+MODULE_LICENSE("GPL");
diff --git a/kernel/time/udelay_test.c b/kernel/time/udelay_test.c
deleted file mode 100644
index e622ba3..0000000
--- a/kernel/time/udelay_test.c
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * udelay() test kernel module
- *
- * Test is executed by writing and reading to /sys/kernel/debug/udelay_test
- * Tests are configured by writing: USECS ITERATIONS
- * Tests are executed by reading from the same file.
- * Specifying usecs of 0 or negative values will run multiples tests.
- *
- * Copyright (C) 2014 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/ktime.h>
-#include <linux/module.h>
-#include <linux/uaccess.h>
-
-#define DEFAULT_ITERATIONS 100
-
-#define DEBUGFS_FILENAME "udelay_test"
-
-static DEFINE_MUTEX(udelay_test_lock);
-static struct dentry *udelay_test_debugfs_file;
-static int udelay_test_usecs;
-static int udelay_test_iterations = DEFAULT_ITERATIONS;
-
-static int udelay_test_single(struct seq_file *s, int usecs, uint32_t iters)
-{
-	int min = 0, max = 0, fail_count = 0;
-	uint64_t sum = 0;
-	uint64_t avg;
-	int i;
-	/* Allow udelay to be up to 0.5% fast */
-	int allowed_error_ns = usecs * 5;
-
-	for (i = 0; i < iters; ++i) {
-		struct timespec ts1, ts2;
-		int time_passed;
-
-		ktime_get_ts(&ts1);
-		udelay(usecs);
-		ktime_get_ts(&ts2);
-		time_passed = timespec_to_ns(&ts2) - timespec_to_ns(&ts1);
-
-		if (i == 0 || time_passed < min)
-			min = time_passed;
-		if (i == 0 || time_passed > max)
-			max = time_passed;
-		if ((time_passed + allowed_error_ns) / 1000 < usecs)
-			++fail_count;
-		WARN_ON(time_passed < 0);
-		sum += time_passed;
-	}
-
-	avg = sum;
-	do_div(avg, iters);
-	seq_printf(s, "%d usecs x %d: exp=%d allowed=%d min=%d avg=%lld max=%d",
-			usecs, iters, usecs * 1000,
-			(usecs * 1000) - allowed_error_ns, min, avg, max);
-	if (fail_count)
-		seq_printf(s, " FAIL=%d", fail_count);
-	seq_puts(s, "\n");
-
-	return 0;
-}
-
-static int udelay_test_show(struct seq_file *s, void *v)
-{
-	int usecs;
-	int iters;
-	int ret = 0;
-
-	mutex_lock(&udelay_test_lock);
-	usecs = udelay_test_usecs;
-	iters = udelay_test_iterations;
-	mutex_unlock(&udelay_test_lock);
-
-	if (usecs > 0 && iters > 0) {
-		return udelay_test_single(s, usecs, iters);
-	} else if (usecs == 0) {
-		struct timespec ts;
-
-		ktime_get_ts(&ts);
-		seq_printf(s, "udelay() test (lpj=%ld kt=%ld.%09ld)\n",
-				loops_per_jiffy, ts.tv_sec, ts.tv_nsec);
-		seq_puts(s, "usage:\n");
-		seq_puts(s, "echo USECS [ITERS] > " DEBUGFS_FILENAME "\n");
-		seq_puts(s, "cat " DEBUGFS_FILENAME "\n");
-	}
-
-	return ret;
-}
-
-static int udelay_test_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, udelay_test_show, inode->i_private);
-}
-
-static ssize_t udelay_test_write(struct file *file, const char __user *buf,
-		size_t count, loff_t *pos)
-{
-	char lbuf[32];
-	int ret;
-	int usecs;
-	int iters;
-
-	if (count >= sizeof(lbuf))
-		return -EINVAL;
-
-	if (copy_from_user(lbuf, buf, count))
-		return -EFAULT;
-	lbuf[count] = '\0';
-
-	ret = sscanf(lbuf, "%d %d", &usecs, &iters);
-	if (ret < 1)
-		return -EINVAL;
-	else if (ret < 2)
-		iters = DEFAULT_ITERATIONS;
-
-	mutex_lock(&udelay_test_lock);
-	udelay_test_usecs = usecs;
-	udelay_test_iterations = iters;
-	mutex_unlock(&udelay_test_lock);
-
-	return count;
-}
-
-static const struct file_operations udelay_test_debugfs_ops = {
-	.owner = THIS_MODULE,
-	.open = udelay_test_open,
-	.read = seq_read,
-	.write = udelay_test_write,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
-
-static int __init udelay_test_init(void)
-{
-	mutex_lock(&udelay_test_lock);
-	udelay_test_debugfs_file = debugfs_create_file(DEBUGFS_FILENAME,
-			S_IRUSR, NULL, NULL, &udelay_test_debugfs_ops);
-	mutex_unlock(&udelay_test_lock);
-
-	return 0;
-}
-
-module_init(udelay_test_init);
-
-static void __exit udelay_test_exit(void)
-{
-	mutex_lock(&udelay_test_lock);
-	debugfs_remove(udelay_test_debugfs_file);
-	mutex_unlock(&udelay_test_lock);
-}
-
-module_exit(udelay_test_exit);
-
-MODULE_AUTHOR("David Riley <[email-masked]>");
-MODULE_LICENSE("GPL");
-- 
1.9.1