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x86/oprofile: disable preemption in nmi_shutdown

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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 <[email protected]>
Cc: Philippe Elie <[email protected]>
Cc: [email protected]
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Vegard Nossum 2008-06-22 09:40:18 +02:00 • committed by Ingo Molnar
commit 93e1ade538
1 changed files with 2 additions and 1 deletions
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3
arch/x86/oprofile/nmi_int.c
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@ -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)