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authorDimitri Sivanich <sivanich@sgi.com>2008-05-12 21:21:14 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-25 06:35:03 +0200
commit9383d9679056e6cc4e7ff70f31da945a268238f4 (patch)
treec6678a8c4e0fed0739e43f24b608d51856af6f1f /kernel/sysctl.c
parent9c44bc03fff44ff04237a7d92e35304a0e50c331 (diff)
downloadlinux-9383d9679056e6cc4e7ff70f31da945a268238f4.tar.bz2
softlockup: fix softlockup_thresh unaligned access and disable detection at runtime
Fix unaligned access errors when setting softlockup_thresh on 64 bit platforms. Allow softlockup detection to be disabled by setting softlockup_thresh <= 0. Detect that boot time softlockup detection has been disabled earlier in softlockup_tick. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 2d3b388c402d..31c19a79738d 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -84,12 +84,13 @@ extern int latencytop_enabled;
extern int sysctl_nr_open_min, sysctl_nr_open_max;
/* Constants used for minimum and maximum */
-#if defined(CONFIG_DETECT_SOFTLOCKUP) || defined(CONFIG_HIGHMEM)
+#ifdef CONFIG_HIGHMEM
static int one = 1;
#endif
#ifdef CONFIG_DETECT_SOFTLOCKUP
static int sixty = 60;
+static int neg_one = -1;
#endif
#ifdef CONFIG_MMU
@@ -742,11 +743,11 @@ static struct ctl_table kern_table[] = {
.ctl_name = CTL_UNNUMBERED,
.procname = "softlockup_thresh",
.data = &softlockup_thresh,
- .maxlen = sizeof(unsigned long),
+ .maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = &proc_doulongvec_minmax,
+ .proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
- .extra1 = &one,
+ .extra1 = &neg_one,
.extra2 = &sixty,
},
{