diff options
| author | Liming Wang <liming.wang@windriver.com> | 2008-12-04 14:24:49 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-04 09:42:35 +0100 |
| commit | faec2ec505d397e9426754722b6e80d519c4938f (patch) | |
| tree | 574d290807a5bdf1bb41325ce6855aecf872e1b5 /kernel | |
| parent | 6b2539302bee8e88c99e3c7d80c16a04dbe5e2ad (diff) | |
ftrace: avoid duplicated function when writing set_graph_function
Impact: fix a bug in function filter setting
when writing function to set_graph_function, we should check whether it
has existed in set_graph_function to avoid duplicating.
Signed-off-by: Liming Wang <liming.wang@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ftrace.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index eb57dc1ea09..d2b15653816 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1425,7 +1425,7 @@ ftrace_set_func(unsigned long *array, int idx, char *buffer) struct dyn_ftrace *rec; struct ftrace_page *pg; int found = 0; - int i; + int i, j; if (ftrace_disabled) return -ENODEV; @@ -1443,7 +1443,13 @@ ftrace_set_func(unsigned long *array, int idx, char *buffer) kallsyms_lookup(rec->ip, NULL, NULL, NULL, str); if (strcmp(str, buffer) == 0) { found = 1; - array[idx] = rec->ip; + for (j = 0; j < idx; j++) + if (array[j] == rec->ip) { + found = 0; + break; + } + if (found) + array[idx] = rec->ip; break; } } |