From 01e6aac78b1c5c9e7115c15f5dbf942959b8f3ad Mon Sep 17 00:00:00 2001 From: Luis Chamberlain Date: Thu, 18 May 2023 13:37:41 -0700 Subject: signal: move show_unhandled_signals sysctl to its own file The show_unhandled_signals sysctl is the only sysctl for debug left on kernel/sysctl.c. We've been moving the syctls out from kernel/sysctl.c so to help avoid merge conflicts as the shared array gets out of hand. This change incurs simplifies sysctl registration by localizing it where it should go for a penalty in size of increasing the kernel by 23 bytes, we accept this given recent cleanups have actually already saved us 1465 bytes in the prior commits. ./scripts/bloat-o-meter vmlinux.3-remove-dev-table vmlinux.4-remove-debug-table add/remove: 3/1 grow/shrink: 0/1 up/down: 177/-154 (23) Function old new delta signal_debug_table - 128 +128 init_signal_sysctls - 33 +33 __pfx_init_signal_sysctls - 16 +16 sysctl_init_bases 85 59 -26 debug_table 128 - -128 Total: Before=21256967, After=21256990, chg +0.00% Reviewed-by: Joel Granados Signed-off-by: Luis Chamberlain --- kernel/signal.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index 8f6330f0e9ca..5ba4150c01a7 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -45,6 +45,7 @@ #include #include #include +#include #define CREATE_TRACE_POINTS #include @@ -4771,6 +4772,28 @@ static inline void siginfo_buildtime_checks(void) #endif } +#if defined(CONFIG_SYSCTL) +static struct ctl_table signal_debug_table[] = { +#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE + { + .procname = "exception-trace", + .data = &show_unhandled_signals, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec + }, +#endif + { } +}; + +static int __init init_signal_sysctls(void) +{ + register_sysctl_init("debug", signal_debug_table); + return 0; +} +early_initcall(init_signal_sysctls); +#endif /* CONFIG_SYSCTL */ + void __init signals_init(void) { siginfo_buildtime_checks(); -- cgit v1.2.3