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MIPS: oprofile: Enable backtrace on timer-based profiling

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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>
This commit is contained in:
Aaro Koskinen 2014-10-17 18:10:25 +03:00 committed by Ralf Baechle
parent 26b40ef1aa
commit 1b48142a80
1 changed files with 6 additions and 1 deletions
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7
arch/mips/oprofile/common.c
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@ -110,6 +110,12 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
break; break;
}; };
/*
* Always set the backtrace. This allows unsupported CPU types to still
* use timer-based oprofile.
*/
ops->backtrace = op_mips_backtrace;
if (!lmodel) if (!lmodel)
return -ENODEV; return -ENODEV;
@ -125,7 +131,6 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
ops->start = op_mips_start; ops->start = op_mips_start;
ops->stop = op_mips_stop; ops->stop = op_mips_stop;
ops->cpu_type = lmodel->cpu_type; ops->cpu_type = lmodel->cpu_type;
ops->backtrace = op_mips_backtrace;
printk(KERN_INFO "oprofile: using %s performance monitoring.\n", printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
lmodel->cpu_type); lmodel->cpu_type);