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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-29 12:36:02 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-14 10:34:36 +0200 |
| commit | 8b1fa1d7b22f386747c7b78b918d4c680c16066f (patch) | |
| tree | 9cd3deebefd072adc9ee4b79d32076db2b53a033 /arch/x86/kernel/cpu/perfctr-watchdog.c | |
| parent | ftrace: ignore functions that cannot be kprobe-ed (diff) | |
| download | linux-8b1fa1d7b22f386747c7b78b918d4c680c16066f.tar.xz linux-8b1fa1d7b22f386747c7b78b918d4c680c16066f.zip | |
ftrace: mark lapic_wd_event() notrace
it can be called in the NMI path:
[ 0.645999] calling ftrace_dynamic_init+0x0/0xd6
[ 0.647521] ------------[ cut here ]------------
[ 0.647521] WARNING: at kernel/trace/ftrace.c:348 ftrace_record_ip+0x4e/0x252()
[ 0.647521] Modules linked in:
[ 0.647521] Pid: 15, comm: kstop1 Not tainted 2.6.27-rc1-tip #22686
[ 0.647521]
[ 0.647521] Call Trace:
[ 0.647521] <NMI> [<ffffffff8024593f>] warn_on_slowpath+0x5d/0x84
[ 0.647521] [<ffffffff80220b99>] ? lapic_wd_event+0xb/0x5c
[ 0.647521] [<ffffffff80287b3b>] ftrace_record_ip+0x4e/0x252
[ 0.647521] [<ffffffff80211274>] mcount_call+0x5/0x31
[ 0.647521] [<ffffffff80220b9e>] ? lapic_wd_event+0x10/0x5c
[ 0.647521] [<ffffffff8083f3ec>] nmi_watchdog_tick+0x19d/0x1ad
[ 0.647521] [<ffffffff8083e875>] default_do_nmi+0x75/0x1e3
[ 0.647521] [<ffffffff8083f0b3>] do_nmi+0x5d/0x94
[ 0.647521] [<ffffffff8083e2d2>] nmi+0xa2/0xc2
[ 0.647521] [<ffffffff802b48c3>] ? check_bytes_and_report+0x11/0xcc
[ 0.647521] <<EOE>> [<ffffffff80211274>] ? mcount_call+0x5/0x31
[ 0.647521] [<ffffffff802b49df>] check_object+0x61/0x1b0
[ 0.647521] [<ffffffff802b502a>] __slab_free+0x169/0x2ae
[ 0.647521] [<ffffffff80242dbf>] ? __cleanup_sighand+0x25/0x27
[ 0.647521] [<ffffffff80242dbf>] ? __cleanup_sighand+0x25/0x27
[ 0.647521] [<ffffffff802b60cd>] kmem_cache_free+0x85/0xb9
[ 0.647521] [<ffffffff80242dbf>] __cleanup_sighand+0x25/0x27
[ 0.647521] [<ffffffff80247b3d>] release_task+0x256/0x339
[ 0.647521] [<ffffffff802490b4>] do_exit+0x764/0x7ef
[ 0.647521] [<ffffffff8027624c>] __xchg+0x0/0x38
[ 0.647521] [<ffffffff8027619a>] ? stop_cpu+0x0/0xb2
[ 0.647521] [<ffffffff8027619a>] ? stop_cpu+0x0/0xb2
[ 0.647521] [<ffffffff8025922f>] kthread+0x4e/0x7b
[ 0.647521] [<ffffffff80212979>] child_rip+0xa/0x11
[ 0.647521] [<ffffffff80211c17>] ? restore_args+0x0/0x30
[ 0.647521] [<ffffffff802283a5>] ? native_load_tls+0x14/0x2e
[ 0.647521] [<ffffffff802591e1>] ? kthread+0x0/0x7b
[ 0.647521] [<ffffffff8021296f>] ? child_rip+0x0/0x11
[ 0.647521]
[ 0.647521] ---[ end trace 4eaa2a86a8e2da22 ]---
[ 0.672032] initcall ftrace_dynamic_init+0x0/0xd6 returned 0 after 19 msecs
also mark it no-kprobes while at it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/perfctr-watchdog.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perfctr-watchdog.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c index 6bff382094f5..9abd48b22674 100644 --- a/arch/x86/kernel/cpu/perfctr-watchdog.c +++ b/arch/x86/kernel/cpu/perfctr-watchdog.c @@ -17,6 +17,8 @@ #include <linux/bitops.h> #include <linux/smp.h> #include <linux/nmi.h> +#include <linux/kprobes.h> + #include <asm/apic.h> #include <asm/intel_arch_perfmon.h> @@ -336,7 +338,8 @@ static void single_msr_unreserve(void) release_perfctr_nmi(wd_ops->perfctr); } -static void single_msr_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) +static void __kprobes +single_msr_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) { /* start the cycle over again */ write_watchdog_counter(wd->perfctr_msr, NULL, nmi_hz); @@ -401,7 +404,7 @@ static int setup_p6_watchdog(unsigned nmi_hz) return 1; } -static void p6_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) +static void __kprobes p6_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) { /* * P6 based Pentium M need to re-unmask @@ -605,7 +608,7 @@ static void p4_unreserve(void) release_perfctr_nmi(MSR_P4_IQ_PERFCTR0); } -static void p4_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) +static void __kprobes p4_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) { unsigned dummy; /* @@ -784,7 +787,7 @@ unsigned lapic_adjust_nmi_hz(unsigned hz) return hz; } -int lapic_wd_event(unsigned nmi_hz) +int __kprobes lapic_wd_event(unsigned nmi_hz) { struct nmi_watchdog_ctlblk *wd = &__get_cpu_var(nmi_watchdog_ctlblk); u64 ctr; |