diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/Kconfig | 1 | ||||
| -rw-r--r-- | arch/blackfin/kernel/ftrace-entry.S | 11 |
2 files changed, 11 insertions, 1 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index f46db59eac8..3123aa49ff7 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -25,6 +25,7 @@ config BLACKFIN def_bool y select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER + select HAVE_FUNCTION_TRACE_MCOUNT_TEST select HAVE_IDE select HAVE_KERNEL_GZIP if RAMKERNEL select HAVE_KERNEL_BZIP2 if RAMKERNEL diff --git a/arch/blackfin/kernel/ftrace-entry.S b/arch/blackfin/kernel/ftrace-entry.S index 76dd4fbcd17..db3a51b0af2 100644 --- a/arch/blackfin/kernel/ftrace-entry.S +++ b/arch/blackfin/kernel/ftrace-entry.S @@ -1,7 +1,7 @@ /* * mcount and friends -- ftrace stuff * - * Copyright (C) 2009 Analog Devices Inc. + * Copyright (C) 2009-2010 Analog Devices Inc. * Licensed under the GPL-2 or later. */ @@ -21,6 +21,15 @@ * function will be waiting there. mmmm pie. */ ENTRY(__mcount) +#ifdef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST + /* optional micro optimization: return if stopped */ + p1.l = _function_trace_stop; + p1.h = _function_trace_stop; + r3 = [p1]; + cc = r3 == 0; + if ! cc jump _ftrace_stub (bp); +#endif + /* save third function arg early so we can do testing below */ [--sp] = r2; |