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| author | Michal Simek <monstr@monstr.eu> | 2011-03-18 13:52:27 +0100 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2011-04-01 09:34:51 +0200 |
| commit | 9e1491de519712c73ec621c4ef4872eca6f2bb57 (patch) | |
| tree | 696212790d54df8ba313874115f30b073616a51c /arch | |
| parent | 57bd35d414c453fea2b08e9dad6067ee7e6c188a (diff) | |
| download | op-kernel-dev-9e1491de519712c73ec621c4ef4872eca6f2bb57.zip op-kernel-dev-9e1491de519712c73ec621c4ef4872eca6f2bb57.tar.gz | |
microblaze: Fix ftrace
- Do not trace idle loop which takes a lot time
- Fix cache handling in generic ftrace code
- Do not trace lib functions ashldi3, ashrdi3, lshrdi3
Functions are called from generic ftrace code which
can't be traced
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/microblaze/kernel/ftrace.c | 10 | ||||
| -rw-r--r-- | arch/microblaze/lib/Makefile | 6 |
3 files changed, 13 insertions, 4 deletions
diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile index f0cb5c2..494b63b 100644 --- a/arch/microblaze/kernel/Makefile +++ b/arch/microblaze/kernel/Makefile @@ -10,6 +10,7 @@ CFLAGS_REMOVE_early_printk.o = -pg CFLAGS_REMOVE_selfmod.o = -pg CFLAGS_REMOVE_heartbeat.o = -pg CFLAGS_REMOVE_ftrace.o = -pg +CFLAGS_REMOVE_process.o = -pg endif extra-y := head.o vmlinux.lds diff --git a/arch/microblaze/kernel/ftrace.c b/arch/microblaze/kernel/ftrace.c index 515feb4..357d56a 100644 --- a/arch/microblaze/kernel/ftrace.c +++ b/arch/microblaze/kernel/ftrace.c @@ -51,6 +51,9 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) : "r" (parent), "r" (return_hooker) ); + flush_dcache_range((u32)parent, (u32)parent + 4); + flush_icache_range((u32)parent, (u32)parent + 4); + if (unlikely(faulted)) { ftrace_graph_stop(); WARN_ON(1); @@ -95,6 +98,9 @@ static int ftrace_modify_code(unsigned long addr, unsigned int value) if (unlikely(faulted)) return -EFAULT; + flush_dcache_range(addr, addr + 4); + flush_icache_range(addr, addr + 4); + return 0; } @@ -195,8 +201,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) ret += ftrace_modify_code((unsigned long)&ftrace_caller, MICROBLAZE_NOP); - /* All changes are done - lets do caches consistent */ - flush_icache(); return ret; } @@ -210,7 +214,6 @@ int ftrace_enable_ftrace_graph_caller(void) old_jump = *(unsigned int *)ip; /* save jump over instruction */ ret = ftrace_modify_code(ip, MICROBLAZE_NOP); - flush_icache(); pr_debug("%s: Replace instruction: 0x%x\n", __func__, old_jump); return ret; @@ -222,7 +225,6 @@ int ftrace_disable_ftrace_graph_caller(void) unsigned long ip = (unsigned long)(&ftrace_call_graph); ret = ftrace_modify_code(ip, old_jump); - flush_icache(); pr_debug("%s\n", __func__); return ret; diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile index f1fcbff..10c320a 100644 --- a/arch/microblaze/lib/Makefile +++ b/arch/microblaze/lib/Makefile @@ -2,6 +2,12 @@ # Makefile # +ifdef CONFIG_FUNCTION_TRACER +CFLAGS_REMOVE_ashldi3.o = -pg +CFLAGS_REMOVE_ashrdi3.o = -pg +CFLAGS_REMOVE_lshrdi3.o = -pg +endif + lib-y := memset.o ifeq ($(CONFIG_OPT_LIB_ASM),y) |
