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>
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6b2539302b
Коммит
faec2ec505
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@ -1425,7 +1425,7 @@ ftrace_set_func(unsigned long *array, int idx, char *buffer)
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struct dyn_ftrace *rec;
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struct dyn_ftrace *rec;
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struct ftrace_page *pg;
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struct ftrace_page *pg;
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int found = 0;
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int found = 0;
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int i;
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int i, j;
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if (ftrace_disabled)
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if (ftrace_disabled)
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return -ENODEV;
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return -ENODEV;
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@ -1443,7 +1443,13 @@ ftrace_set_func(unsigned long *array, int idx, char *buffer)
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kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
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kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
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if (strcmp(str, buffer) == 0) {
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if (strcmp(str, buffer) == 0) {
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found = 1;
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found = 1;
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array[idx] = rec->ip;
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for (j = 0; j < idx; j++)
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if (array[j] == rec->ip) {
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found = 0;
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break;
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}
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if (found)
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array[idx] = rec->ip;
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break;
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break;
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}
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}
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}
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}
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