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authorSteven Rostedt <srostedt@redhat.com>2009-02-17 21:35:06 +0300
committerSteven Rostedt <srostedt@redhat.com>2009-02-20 21:16:18 +0300
commit000ab691172db3921efa3cb7f17fc79235a1de7f (patch)
tree5670e20fe203488b408977d5d5634fc9ddf418e1 /include/linux/ftrace.h
parent07a66d7c53a538e1a9759954a82bb6c07365eff9 (diff)
downloadlinux-000ab691172db3921efa3cb7f17fc79235a1de7f.tar.xz
ftrace: allow archs to preform pre and post process for code modification
This patch creates the weak functions: ftrace_arch_code_modify_prepare and ftrace_arch_code_modify_post_process that are called before and after the stop machine is called to modify the kernel text. If the arch needs to do pre or post processing, it only needs to define these functions. [ Update: Ingo Molnar suggested using the name ftrace_arch_code_modify_* over using ftrace_arch_modify_* ] Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'include/linux/ftrace.h')
-rw-r--r--include/linux/ftrace.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 677432b9cb7e..fdb2a89ae543 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -99,6 +99,9 @@ stack_trace_sysctl(struct ctl_table *table, int write,
/* asm/ftrace.h must be defined for archs supporting dynamic ftrace */
#include <asm/ftrace.h>
+int ftrace_arch_code_modify_prepare(void);
+int ftrace_arch_code_modify_post_process(void);
+
enum {
FTRACE_FL_FREE = (1 << 0),
FTRACE_FL_FAILED = (1 << 1),