Commit 1b48142a authored Oct 17, 2014 by Aaro Koskinen Committed by Ralf Baechle Nov 24, 2014

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>

parent 26b40ef1

arch/mips/oprofile/common.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -110,6 +110,12 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
		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 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
		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);

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