From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E23A6AB9 for ; Wed, 23 Mar 2022 23:06:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F750C340E8; Wed, 23 Mar 2022 23:06:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1648076769; bh=WOojmLJNV9d/aw3/y2VsqeO+V8CmGyRiPq3Qzb2AaXU=; h=Date:To:From:In-Reply-To:Subject:From; b=GSFuntTwHN7A86eODiCmkN71zzg2D1RScIIDJtyJRwkXSy8tnkx0keZkZ/qlakm9+ d/OtZ7+1UgD2ujYxaQjB7l7hJ5PWhOD8pgODOKkm6ESO4IJKzYtomSI6q2074ae/ED f2wzURf16/Pm3FDFafW4HQ5VNR6L0n5cNihiNYkQ= Date: Wed, 23 Mar 2022 16:06:08 -0700 To: yj.chiang@mediatek.com,wangkefeng.wang@huawei.com,vbabka@suse.cz,valentin.schneider@arm.com,rostedt@goodmis.org,peterz@infradead.org,mhiramat@kernel.org,matthias.bgg@gmail.com,linux@rasmusvillemoes.dk,keescook@chromium.org,ahalaney@redhat.com,mark-pk.tsai@mediatek.com,akpm@linux-foundation.org,patches@lists.linux.dev,linux-mm@kvack.org,mm-commits@vger.kernel.org,torvalds@linux-foundation.org,akpm@linux-foundation.org From: Andrew Morton In-Reply-To: <20220323160453.65922ced539cbf445b191555@linux-foundation.org> Subject: [patch 17/41] init: use ktime_us_delta() to make initcall_debug log more precise Message-Id: <20220323230609.5F750C340E8@smtp.kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: From: Mark-PK Tsai Subject: 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: Mark-PK Tsai Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney Cc: Steven Rostedt Cc: Matthias Brugger Cc: Masami Hiramatsu Cc: Vlastimil Babka Cc: Kefeng Wang Cc: Rasmus Villemoes Cc: Kees Cook Cc: Valentin Schneider Cc: Peter Zijlstra Cc: YJ Chiang Signed-off-by: Andrew Morton --- init/main.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) --- a/init/main.c~init-use-ktime_us_delta-to-make-initcall_debug-log-more-precise +++ a/init/main.c @@ -1246,15 +1246,11 @@ trace_initcall_start_cb(void *data, init 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; _