MIPS: oprofile: Enable backtrace on timer-based profiling
Allow unsupported CPU types to use backtrace with timer-based profiling.
Some CPUs (notably OCTEON) lack architecture-specific oprofile driver. In
such case oprofile can fallback to timer-based mode, and arch code can
still provide the backtrace functionality. So just set up the backtrace
hook always.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nsn.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8108/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c
index feb9879..a26cbe3 100644
--- a/arch/mips/oprofile/common.c
+++ b/arch/mips/oprofile/common.c
@@ -110,6 +110,12 @@
break;
};
+ /*
+ * Always set the backtrace. This allows unsupported CPU types to still
+ * use timer-based oprofile.
+ */
+ ops->backtrace = op_mips_backtrace;
+
if (!lmodel)
return -ENODEV;
@@ -125,7 +131,6 @@
ops->start = op_mips_start;
ops->stop = op_mips_stop;
ops->cpu_type = lmodel->cpu_type;
- ops->backtrace = op_mips_backtrace;
printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
lmodel->cpu_type);