linux-kernel - [PATCH] rcu: Remove unused macros from rcupdate.h

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Message-ID: <20231020173015.30509-1-pedro.falcato@gmail.com>
Date:   Fri, 20 Oct 2023 18:30:15 +0100
From:   Pedro Falcato <pedro.falcato@...il.com>
To:     "Paul E . McKenney" <paulmck@...nel.org>, rcu@...r.kernel.org
Cc:     Joel Fernandes <joel@...lfernandes.org>,
        Josh Triplett <josh@...htriplett.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Zqiang <qiang.zhang1211@...il.com>, linux-kernel@...r.kernel.org,
        Pedro Falcato <pedro.falcato@...il.com>
Subject: [PATCH] rcu: Remove unused macros from rcupdate.h

ulong2long, USHORT_CMP_GE and USHORT_CMP_LT are redundant and have been
unused for quite a few releases.

Signed-off-by: Pedro Falcato <pedro.falcato@...il.com>
---
Just a boring chore patch that cleans up a few unused macros.

I'm *very* interested in knowing how that ulong2long macro came along,
though. What was wrong with '(long) a'?
 include/linux/rcupdate.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 5e5f920ade9..b9b6b828115 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -34,9 +34,6 @@
 
 #define ULONG_CMP_GE(a, b)	(ULONG_MAX / 2 >= (a) - (b))
 #define ULONG_CMP_LT(a, b)	(ULONG_MAX / 2 < (a) - (b))
-#define ulong2long(a)		(*(long *)(&(a)))
-#define USHORT_CMP_GE(a, b)	(USHRT_MAX / 2 >= (unsigned short)((a) - (b)))
-#define USHORT_CMP_LT(a, b)	(USHRT_MAX / 2 < (unsigned short)((a) - (b)))
 
 /* Exported common interfaces */
 void call_rcu(struct rcu_head *head, rcu_callback_t func);
-- 
2.42.0