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authortangmeng <tangmeng@uniontech.com>2022-02-18 18:59:12 +0800
committerLuis Chamberlain <mcgrof@kernel.org>2022-04-06 13:43:44 -0700
commit9df918698408fd914493aba0b7858fef50eba63a (patch)
treec796aac9faa6122909a6994452d6172bd7337d7b /kernel/panic.c
parentf79c9b8ae8bde10126586c1bb55b5fd027276d8e (diff)
kernel/panic: move panic sysctls to its own file
kernel/sysctl.c is a kitchen sink where everyone leaves their dirty dishes, this makes it very difficult to maintain. To help with this maintenance let's start by moving sysctls to places where they actually belong. The proc sysctl maintainers do not want to know what sysctl knobs you wish to add for your own piece of code, we just care about the core logic. All filesystem syctls now get reviewed by fs folks. This commit follows the commit of fs, move the oops_all_cpu_backtrace sysctl to its own file, kernel/panic.c. Signed-off-by: tangmeng <tangmeng@uniontech.com> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'kernel/panic.c')
-rw-r--r--kernel/panic.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index eb4dfb932c85..eb3f2fe4f6d7 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -43,7 +43,9 @@
* Should we dump all CPUs backtraces in an oops event?
* Defaults to 0, can be changed via sysctl.
*/
-unsigned int __read_mostly sysctl_oops_all_cpu_backtrace;
+static unsigned int __read_mostly sysctl_oops_all_cpu_backtrace;
+#else
+#define sysctl_oops_all_cpu_backtrace 0
#endif /* CONFIG_SMP */
int panic_on_oops = CONFIG_PANIC_ON_OOPS_VALUE;
@@ -73,6 +75,28 @@ ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
EXPORT_SYMBOL(panic_notifier_list);
+#if defined(CONFIG_SMP) && defined(CONFIG_SYSCTL)
+static struct ctl_table kern_panic_table[] = {
+ {
+ .procname = "oops_all_cpu_backtrace",
+ .data = &sysctl_oops_all_cpu_backtrace,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ { }
+};
+
+static __init int kernel_panic_sysctls_init(void)
+{
+ register_sysctl_init("kernel", kern_panic_table);
+ return 0;
+}
+late_initcall(kernel_panic_sysctls_init);
+#endif
+
static long no_blink(int state)
{
return 0;