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| author | Borislav Petkov <bp@suse.de> | 2017-11-07 17:53:07 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-15 14:53:20 (GMT) |
| commit | e45d93b48c930a2c3de556b9dbffc818ec9dd1e3 (patch) | |
| tree | c465a5f3db4cce7b99d881dd488193f4674acd95 /arch/x86/kernel/i8253.c | |
| parent | 9d5e5994c5f90121ac09efd04ee565aa8bddc049 (diff) | |
| download | linux-e45d93b48c930a2c3de556b9dbffc818ec9dd1e3.tar.xz | |
x86/oprofile/ppro: Do not use __this_cpu*() in preemptible context
commit a743bbeef27b9176987ec0cb7f906ab0ab52d1da upstream.
The warning below says it all:
BUG: using __this_cpu_read() in preemptible [00000000] code: swapper/0/1
caller is __this_cpu_preempt_check
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.14.0-rc8 #4
Call Trace:
dump_stack
check_preemption_disabled
? do_early_param
__this_cpu_preempt_check
arch_perfmon_init
op_nmi_init
? alloc_pci_root_info
oprofile_arch_init
oprofile_init
do_one_initcall
...
These accessors should not have been used in the first place: it is PPro so
no mixed silicon revisions and thus it can simply use boot_cpu_data.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Fix-creation-mandated-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Robert Richter <rric@kernel.org>
Cc: x86@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/i8253.c')
0 files changed, 0 insertions, 0 deletions