diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ftrace.c | 38 |
1 files changed, 23 insertions, 15 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 2d6f8bcd188..dcd3a814d39 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -22,6 +22,7 @@ #include <linux/hardirq.h> #include <linux/kthread.h> #include <linux/uaccess.h> +#include <linux/bsearch.h> #include <linux/module.h> #include <linux/ftrace.h> #include <linux/sysctl.h> @@ -1300,6 +1301,19 @@ ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip) } \ } + +static int ftrace_cmp_recs(const void *a, const void *b) +{ + const struct dyn_ftrace *reca = a; + const struct dyn_ftrace *recb = b; + + if (reca->ip > recb->ip) + return 1; + if (reca->ip < recb->ip) + return -1; + return 0; +} + /** * ftrace_location - return true if the ip giving is a traced location * @ip: the instruction pointer to check @@ -1313,11 +1327,17 @@ int ftrace_location(unsigned long ip) { struct ftrace_page *pg; struct dyn_ftrace *rec; + struct dyn_ftrace key; - do_for_each_ftrace_rec(pg, rec) { - if (rec->ip == ip) + key.ip = ip; + + for (pg = ftrace_pages_start; pg; pg = pg->next) { + rec = bsearch(&key, pg->records, pg->index, + sizeof(struct dyn_ftrace), + ftrace_cmp_recs); + if (rec) return 1; - } while_for_each_ftrace_rec(); + } return 0; } @@ -3587,18 +3607,6 @@ static void ftrace_swap_recs(void *a, void *b, int size) *recb = t; } -static int ftrace_cmp_recs(const void *a, const void *b) -{ - const struct dyn_ftrace *reca = a; - const struct dyn_ftrace *recb = b; - - if (reca->ip > recb->ip) - return 1; - if (reca->ip < recb->ip) - return -1; - return 0; -} - static int ftrace_process_locs(struct module *mod, unsigned long *start, unsigned long *end) |