diff options
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 366d7881f18..2d6f8bcd188 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -27,6 +27,7 @@ #include <linux/sysctl.h> #include <linux/slab.h> #include <linux/ctype.h> +#include <linux/sort.h> #include <linux/list.h> #include <linux/hash.h> #include <linux/rcupdate.h> @@ -3575,6 +3576,29 @@ static __init int ftrace_init_dyn_debugfs(struct dentry *d_tracer) return 0; } +static void ftrace_swap_recs(void *a, void *b, int size) +{ + struct dyn_ftrace *reca = a; + struct dyn_ftrace *recb = b; + struct dyn_ftrace t; + + t = *reca; + *reca = *recb; + *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) @@ -3638,6 +3662,11 @@ static int ftrace_process_locs(struct module *mod, /* These new locations need to be initialized */ ftrace_new_pgs = pg; + /* Make each individual set of pages sorted by ips */ + for (; pg; pg = pg->next) + sort(pg->records, pg->index, sizeof(struct dyn_ftrace), + ftrace_cmp_recs, ftrace_swap_recs); + /* * We only need to disable interrupts on start up * because we are modifying code that an interrupt |