Commit 105e8c2e authored by Mark-PK Tsai's avatar Mark-PK Tsai Committed by Linus Torvalds
Browse files

init: use ktime_us_delta() to make initcall_debug log more precise 

Use ktime_us_delta() to make the initcall_debug log more precise than
right shifting the result of ktime_to_ns() by 10 bits.

Link: https://lkml.kernel.org/r/20220209053350.15771-1-mark-pk.tsai@mediatek.com


Signed-off-by: default avatarMark-PK Tsai <mark-pk.tsai@mediatek.com>
Reviewed-by: default avatarAndrew Halaney <ahalaney@redhat.com>
Tested-by: default avatarAndrew Halaney <ahalaney@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Valentin Schneider <valentin.schneider@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: YJ Chiang <yj.chiang@mediatek.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c882c6b1

init/main.c

+2 −6
Original line number Diff line number Diff line
@@ -1246,15 +1246,11 @@ trace_initcall_start_cb(void *data, initcall_t fn) 
static __init_or_module void

trace_initcall_finish_cb(void *data, initcall_t fn, int ret)

{

	ktime_t *calltime = (ktime_t *)data;

	ktime_t delta, rettime;

	unsigned long long duration;

	ktime_t rettime, *calltime = (ktime_t *)data;



	rettime = ktime_get();

	delta = ktime_sub(rettime, *calltime);

	duration = (unsigned long long) ktime_to_ns(delta) >> 10;

	printk(KERN_DEBUG "initcall %pS returned %d after %lld usecs\n",

		 fn, ret, duration);

		 fn, ret, (unsigned long long)ktime_us_delta(rettime, *calltime));

}



static ktime_t initcall_calltime;