linux-kernel - [PATCH v2] average: Clarify the restrictions

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Message-Id: <20220601071907.22070-1-juitse.huang@gmail.com>
Date:   Wed,  1 Jun 2022 15:19:06 +0800
From:   Jui-Tse Huang <juitse.huang@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jui-Tse Huang <juitse.huang@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Johannes Berg <johannes.berg@...el.com>,
        Bruno Randolf <br1@...fach.org>,
        Ching-Chun Huang <jserv@...s.ncku.edu.tw>
Subject: [PATCH v2] average: Clarify the restrictions

There is several restrictions in the EWMA helper macro that the
developers should take care of, but the comment does not mentioned yet,
thus, this patch clarify the restrictions.

Signed-off-by: Jui-Tse Huang <juitse.huang@...il.com>
---

Notes:
    v2: fix spelling and wording (Bruno Randolf)

 include/linux/average.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/average.h b/include/linux/average.h
index a1a8f09631ce..ff0953ba2820 100644
--- a/include/linux/average.h
+++ b/include/linux/average.h
@@ -13,6 +13,9 @@
  * precision and fall-off coefficient determined at compile-time
  * and built into the generated helper funtions.
  *
+ * This implementation supports up to 30 bits of precition, and only
+ * the API for fetching non-fractional part is provided for now.
+ *
  * The first argument to the macro is the name that will be used
  * for the struct and helper functions.
  *
-- 
2.34.1