diff options
| author | Vegard Nossum <vegard.nossum@gmail.com> | 2008-06-22 09:40:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-24 13:48:29 +0200 |
| commit | 93e1ade5382206d597e9d6de2d1383e69f54d064 (patch) | |
| tree | 44b3a9f6735e6cba34f0ec22bd57f20f8a50c160 | |
| parent | 62786b9e81a2dbe9c073a2ade52d33a2627d6d85 (diff) | |
x86/oprofile: disable preemption in nmi_shutdown
fix:
BUG: using smp_processor_id() in preemptible [00000000] code: oprofiled/27301
caller is nmi_shutdown+0x11/0x60
Pid: 27301, comm: oprofiled Not tainted 2.6.26-rc7 #25
[<c028a90d>] debug_smp_processor_id+0xbd/0xc0
[<c045fba1>] nmi_shutdown+0x11/0x60
[<c045dd4a>] oprofile_shutdown+0x2a/0x60
Note that we don't need this for the other functions, since they are all
called with on_each_cpu() (which disables preemption for us anyway).
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: oprofile-list@lists.sf.net
Cc: Johannes Weiner <hannes@saeurebad.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index cc48d3fde54..2b6ad5b9f9d 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -269,12 +269,13 @@ static void nmi_cpu_shutdown(void *dummy) static void nmi_shutdown(void) { - struct op_msrs *msrs = &__get_cpu_var(cpu_msrs); + struct op_msrs *msrs = &get_cpu_var(cpu_msrs); nmi_enabled = 0; on_each_cpu(nmi_cpu_shutdown, NULL, 0, 1); unregister_die_notifier(&profile_exceptions_nb); model->shutdown(msrs); free_msrs(); + put_cpu_var(cpu_msrs); } static void nmi_cpu_start(void *dummy) |