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authorRobert Richter <robert.richter@amd.com>2011-01-03 12:15:14 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-01-07 13:58:43 -0800
commit1044d6d19d23ef6fc8afe808ac8f8a9a4dc827ce (patch)
tree49a9f1e2db093e9aaa2831e150d475d3da1cc619 /drivers/mfd
parent36bd931c61a97d5b8f9bc3ded62c4e43b22c34ff (diff)
arch/x86/oprofile/op_model_amd.c: Perform initialisation on a single CPU
commit c7c25802b39c443b3745cfa973dc49a97a3491f8 upstream. Disable preemption in init_ibs(). The function only checks the ibs capabilities and sets up pci devices (if necessary). It runs only on one cpu but operates with the local APIC and some MSRs, thus it is better to disable preemption. [ 7.034377] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/483 [ 7.034385] caller is setup_APIC_eilvt+0x155/0x180 [ 7.034389] Pid: 483, comm: modprobe Not tainted 2.6.37-rc1-20101110+ #1 [ 7.034392] Call Trace: [ 7.034400] [<ffffffff812a2b72>] debug_smp_processor_id+0xd2/0xf0 [ 7.034404] [<ffffffff8101e985>] setup_APIC_eilvt+0x155/0x180 [ ... ] Addresses https://bugzilla.kernel.org/show_bug.cgi?id=22812 Reported-by: <atswartz@gmail.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list@lists.sourceforge.net <oprofile-list@lists.sourceforge.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Dan Carpenter <error27@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <20110103111514.GM4739@erda.amd.com> [ small cleanups ] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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