From 6db0290322101f971d6c06ee652d9838f3f4ee92 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Wed, 9 Sep 2015 23:27:02 +0200 Subject: ftrace: Remove redundant swap function To cover the common case of sorting an array of pointers, Daniel Wagner recently modified the library sort() to use a specific swap function for size==8, in addition to the size==4 case which was already handled. Since sizeof(long) is either 4 or 8, ftrace_swap_ips() is redundant and we can just let sort() pick an appropriate and fast swap callback. Link: http://lkml.kernel.org/r/1441834023-13130-1-git-send-email-linux@rasmusvillemoes.dk Signed-off-by: Rasmus Villemoes Signed-off-by: Steven Rostedt diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index e763848..f7b78d7 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -4788,17 +4788,6 @@ static int ftrace_cmp_ips(const void *a, const void *b) 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, unsigned long *start, unsigned long *end) @@ -4818,7 +4807,7 @@ static int ftrace_process_locs(struct module *mod, return 0; sort(start, count, sizeof(*start), - ftrace_cmp_ips, ftrace_swap_ips); + ftrace_cmp_ips, NULL); start_pg = ftrace_allocate_pages(count); if (!start_pg) -- cgit v0.10.2