From: Aaro Koskinen Date: Fri, 17 Oct 2014 15:10:25 +0000 (+0300) Subject: MIPS: oprofile: Enable backtrace on timer-based profiling X-Git-Tag: v3.19-rc1~115^2~36 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=1b48142a809ee03f48979fad647245dbe0ce423a;p=linux.git 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 Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8108/ Signed-off-by: Ralf Baechle --- 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);