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-rw-r--r--drivers/char/sysrq.c30
-rw-r--r--fs/proc/proc_misc.c26
2 files changed, 30 insertions, 26 deletions
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 2aa79ab1930d..dce4cc0e6953 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -23,6 +23,7 @@
23#include <linux/reboot.h> 23#include <linux/reboot.h>
24#include <linux/sysrq.h> 24#include <linux/sysrq.h>
25#include <linux/kbd_kern.h> 25#include <linux/kbd_kern.h>
26#include <linux/proc_fs.h>
26#include <linux/quotaops.h> 27#include <linux/quotaops.h>
27#include <linux/kernel.h> 28#include <linux/kernel.h>
28#include <linux/module.h> 29#include <linux/module.h>
@@ -534,3 +535,32 @@ int unregister_sysrq_key(int key, struct sysrq_key_op *op_p)
534 return __sysrq_swap_key_ops(key, NULL, op_p); 535 return __sysrq_swap_key_ops(key, NULL, op_p);
535} 536}
536EXPORT_SYMBOL(unregister_sysrq_key); 537EXPORT_SYMBOL(unregister_sysrq_key);
538
539#ifdef CONFIG_PROC_FS
540/*
541 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
542 */
543static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
544 size_t count, loff_t *ppos)
545{
546 if (count) {
547 char c;
548
549 if (get_user(c, buf))
550 return -EFAULT;
551 __handle_sysrq(c, NULL, 0);
552 }
553 return count;
554}
555
556static const struct file_operations proc_sysrq_trigger_operations = {
557 .write = write_sysrq_trigger,
558};
559
560static int __init sysrq_init(void)
561{
562 proc_create("sysrq-trigger", S_IWUSR, NULL, &proc_sysrq_trigger_operations);
563 return 0;
564}
565module_init(sysrq_init);
566#endif
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index b675a49c1823..59ea42e1ef03 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -45,7 +45,6 @@
45#include <linux/blkdev.h> 45#include <linux/blkdev.h>
46#include <linux/hugetlb.h> 46#include <linux/hugetlb.h>
47#include <linux/jiffies.h> 47#include <linux/jiffies.h>
48#include <linux/sysrq.h>
49#include <linux/vmalloc.h> 48#include <linux/vmalloc.h>
50#include <linux/crash_dump.h> 49#include <linux/crash_dump.h>
51#include <linux/pid_namespace.h> 50#include <linux/pid_namespace.h>
@@ -704,28 +703,6 @@ static int execdomains_read_proc(char *page, char **start, off_t off,
704 return proc_calc_metrics(page, start, off, count, eof, len); 703 return proc_calc_metrics(page, start, off, count, eof, len);
705} 704}
706 705
707#ifdef CONFIG_MAGIC_SYSRQ
708/*
709 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
710 */
711static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
712 size_t count, loff_t *ppos)
713{
714 if (count) {
715 char c;
716
717 if (get_user(c, buf))
718 return -EFAULT;
719 __handle_sysrq(c, NULL, 0);
720 }
721 return count;
722}
723
724static const struct file_operations proc_sysrq_trigger_operations = {
725 .write = write_sysrq_trigger,
726};
727#endif
728
729#ifdef CONFIG_PROC_PAGE_MONITOR 706#ifdef CONFIG_PROC_PAGE_MONITOR
730#define KPMSIZE sizeof(u64) 707#define KPMSIZE sizeof(u64)
731#define KPMMASK (KPMSIZE - 1) 708#define KPMMASK (KPMSIZE - 1)
@@ -934,7 +911,4 @@ void __init proc_misc_init(void)
934#ifdef CONFIG_PROC_VMCORE 911#ifdef CONFIG_PROC_VMCORE
935 proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations); 912 proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
936#endif 913#endif
937#ifdef CONFIG_MAGIC_SYSRQ
938 proc_create("sysrq-trigger", S_IWUSR, NULL, &proc_sysrq_trigger_operations);
939#endif
940} 914}