diff options
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index cf81f27ce6c6..53ed01ed7aa7 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3666,15 +3666,27 @@ static __init int ftrace_init_dyn_debugfs(struct dentry *d_tracer) return 0; } -static void ftrace_swap_recs(void *a, void *b, int size) +static int ftrace_cmp_ips(const void *a, const void *b) { - struct dyn_ftrace *reca = a; - struct dyn_ftrace *recb = b; - struct dyn_ftrace t; + const unsigned long *ipa = a; + const unsigned long *ipb = b; - t = *reca; - *reca = *recb; - *recb = t; + if (*ipa > *ipb) + return 1; + if (*ipa < *ipb) + return -1; + return 0; +} + +static void ftrace_swap_ips(void *a, void *b, int size) +{ + unsigned long *ipa = a; + unsigned long *ipb = b; + unsigned long t; + + t = *ipa; + *ipa = *ipb; + *ipb = t; } static int ftrace_process_locs(struct module *mod, @@ -3693,6 +3705,9 @@ static int ftrace_process_locs(struct module *mod, if (!count) return 0; + sort(start, count, sizeof(*start), + ftrace_cmp_ips, ftrace_swap_ips); + pg = ftrace_allocate_pages(count); if (!pg) return -ENOMEM; @@ -3740,11 +3755,6 @@ 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 |