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authorAaro Koskinen <aaro.koskinen@nsn.com>2014-10-17 18:10:25 +0300
committerRalf Baechle <ralf@linux-mips.org>2014-11-24 07:45:31 +0100
commit1b48142a809ee03f48979fad647245dbe0ce423a (patch)
tree464f7ed511ec30fc7eec78c595c042b0b2dc9db8 /arch/mips/oprofile
parent26b40ef1aa138599af223d08b73fd5d960fdabf7 (diff)
downloadlinux-1b48142a809ee03f48979fad647245dbe0ce423a.tar.bz2
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>
Diffstat (limited to 'arch/mips/oprofile')
-rw-r--r--arch/mips/oprofile/common.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c
index feb987981f55..a26cbe372e06 100644
--- a/arch/mips/oprofile/common.c
+++ b/arch/mips/oprofile/common.c
@@ -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);