summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--kernel/trace/ftrace.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e10f9e522c44..fc93562a6654 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1411,6 +1411,8 @@ int ftrace_location(unsigned long ip)
key.ip = ip;
for (pg = ftrace_pages_start; pg; pg = pg->next) {
+ if (ip < pg->records[0].ip || ip > pg->records[pg->index - 1].ip)
+ continue;
rec = bsearch(&key, pg->records, pg->index,
sizeof(struct dyn_ftrace),
ftrace_cmp_recs);
@@ -1571,16 +1573,24 @@ void ftrace_bug(int failed, unsigned long ip)
/* Return 1 if the address range is reserved for ftrace */
-int ftrace_text_reserved(void *start, void *end)
+int ftrace_text_reserved(void *s, void *e)
{
struct dyn_ftrace *rec;
struct ftrace_page *pg;
+ unsigned long start = (unsigned long)s;
+ unsigned long end = (unsigned long)e;
+ int i;
- do_for_each_ftrace_rec(pg, rec) {
- if (rec->ip <= (unsigned long)end &&
- rec->ip + MCOUNT_INSN_SIZE > (unsigned long)start)
- return 1;
- } while_for_each_ftrace_rec();
+ for (pg = ftrace_pages_start; pg; pg = pg->next) {
+ if (end < pg->records[0].ip ||
+ start >= (pg->records[pg->index - 1].ip + MCOUNT_INSN_SIZE))
+ continue;
+ for (i = 0; i < pg->index; i++) {
+ rec = &pg->records[i];
+ if (rec->ip <= end && rec->ip + MCOUNT_INSN_SIZE > start)
+ return 1;
+ }
+ }
return 0;
}