1 files changed, 0 insertions, 174 deletions
diff --git a/Documentation/laptops/freefall.c b/Documentation/laptops/freefall.c
deleted file mode 100644
index 5e44b20b1848..000000000000
--- a/Documentation/laptops/freefall.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/* Disk protection for HP/DELL machines.
- *
- * Copyright 2008 Eric Piel
- * Copyright 2009 Pavel Machek <pavel@ucw.cz>
- * Copyright 2012 Sonal Santan
- * Copyright 2014 Pali Rohár <pali.rohar@gmail.com>
- *
- * GPLv2.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-#include <signal.h>
-#include <sys/mman.h>
-#include <sched.h>
-#include <syslog.h>
-
-static int noled;
-static char unload_heads_path[64];
-static char device_path[32];
-static const char app_name[] = "FREE FALL";
-
-static int set_unload_heads_path(char *device)
-{
-	if (strlen(device) <= 5 || strncmp(device, "/dev/", 5) != 0)
-		return -EINVAL;
-	strncpy(device_path, device, sizeof(device_path) - 1);
-
-	snprintf(unload_heads_path, sizeof(unload_heads_path) - 1,
-				"/sys/block/%s/device/unload_heads", device+5);
-	return 0;
-}
-
-static int valid_disk(void)
-{
-	int fd = open(unload_heads_path, O_RDONLY);
-
-	if (fd < 0) {
-		perror(unload_heads_path);
-		return 0;
-	}
-
-	close(fd);
-	return 1;
-}
-
-static void write_int(char *path, int i)
-{
-	char buf[1024];
-	int fd = open(path, O_RDWR);
-
-	if (fd < 0) {
-		perror("open");
-		exit(1);
-	}
-
-	sprintf(buf, "%d", i);
-
-	if (write(fd, buf, strlen(buf)) != strlen(buf)) {
-		perror("write");
-		exit(1);
-	}
-
-	close(fd);
-}
-
-static void set_led(int on)
-{
-	if (noled)
-		return;
-	write_int("/sys/class/leds/hp::hddprotect/brightness", on);
-}
-
-static void protect(int seconds)
-{
-	const char *str = (seconds == 0) ? "Unparked" : "Parked";
-
-	write_int(unload_heads_path, seconds*1000);
-	syslog(LOG_INFO, "%s %s disk head\n", str, device_path);
-}
-
-static int on_ac(void)
-{
-	/* /sys/class/power_supply/AC0/online */
-	return 1;
-}
-
-static int lid_open(void)
-{
-	/* /proc/acpi/button/lid/LID/state */
-	return 1;
-}
-
-static void ignore_me(int signum)
-{
-	protect(0);
-	set_led(0);
-}
-
-int main(int argc, char **argv)
-{
-	int fd, ret;
-	struct stat st;
-	struct sched_param param;
-
-	if (argc == 1)
-		ret = set_unload_heads_path("/dev/sda");
-	else if (argc == 2)
-		ret = set_unload_heads_path(argv[1]);
-	else
-		ret = -EINVAL;
-
-	if (ret || !valid_disk()) {
-		fprintf(stderr, "usage: %s <device> (default: /dev/sda)\n",
-				argv[0]);
-		exit(1);
-	}
-
-	fd = open("/dev/freefall", O_RDONLY);
-	if (fd < 0) {
-		perror("/dev/freefall");
-		return EXIT_FAILURE;
-	}
-
-	if (stat("/sys/class/leds/hp::hddprotect/brightness", &st))
-		noled = 1;
-
-	if (daemon(0, 0) != 0) {
-		perror("daemon");
-		return EXIT_FAILURE;
-	}
-
-	openlog(app_name, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
-
-	param.sched_priority = sched_get_priority_max(SCHED_FIFO);
-	sched_setscheduler(0, SCHED_FIFO, &param);
-	mlockall(MCL_CURRENT|MCL_FUTURE);
-
-	signal(SIGALRM, ignore_me);
-
-	for (;;) {
-		unsigned char count;
-
-		ret = read(fd, &count, sizeof(count));
-		alarm(0);
-		if ((ret == -1) && (errno == EINTR)) {
-			/* Alarm expired, time to unpark the heads */
-			continue;
-		}
-
-		if (ret != sizeof(count)) {
-			perror("read");
-			break;
-		}
-
-		protect(21);
-		set_led(1);
-		if (1 || on_ac() || lid_open())
-			alarm(2);
-		else
-			alarm(20);
-	}
-
-	closelog();
-	close(fd);
-	return EXIT_SUCCESS;
-}