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ftrace: Consolidate some duplicate code for updating ftrace ops 

When ftrace ops modifies the functions that it will trace, the update
to the function mcount callers may need to be modified. Consolidate
the two places that do the checks to see if an update is required
with a wrapper function for those checks.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2013-07-25 20:22:00 -04:00 committed by Steven Rostedt
parent bf682c3159
commit 1c80c43290
1 changed files with 10 additions and 6 deletions
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16
kernel/trace/ftrace.c
View File

@ -3384,6 +3384,12 @@ ftrace_match_addr(struct ftrace_hash *hash, unsigned long ip, int remove)
return add_hash_entry(hash, ip);
}
static void ftrace_ops_update_code(struct ftrace_ops *ops)
{
if (ops->flags & FTRACE_OPS_FL_ENABLED && ftrace_enabled)
ftrace_run_update_code(FTRACE_UPDATE_CALLS);
}
static int
ftrace_set_hash(struct ftrace_ops *ops, unsigned char *buf, int len,
unsigned long ip, int remove, int reset, int enable)
@ -3426,9 +3432,8 @@ ftrace_set_hash(struct ftrace_ops *ops, unsigned char *buf, int len,
mutex_lock(&ftrace_lock);
ret = ftrace_hash_move(ops, enable, orig_hash, hash);
if (!ret && ops->flags & FTRACE_OPS_FL_ENABLED
&& ftrace_enabled)
ftrace_run_update_code(FTRACE_UPDATE_CALLS);
if (!ret)
ftrace_ops_update_code(ops);
mutex_unlock(&ftrace_lock);
@ -3655,9 +3660,8 @@ int ftrace_regex_release(struct inode *inode, struct file *file)
mutex_lock(&ftrace_lock);
ret = ftrace_hash_move(iter->ops, filter_hash,
orig_hash, iter->hash);
if (!ret && (iter->ops->flags & FTRACE_OPS_FL_ENABLED)
&& ftrace_enabled)
ftrace_run_update_code(FTRACE_UPDATE_CALLS);
if (!ret)
ftrace_ops_update_code(iter->ops);
mutex_unlock(&ftrace_lock);
}