linux-kernel - [PATCH v4 02/11] tools/lib: Add list_is

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Message-ID: <20250826051039.2626894-3-swapnil.sapkal@amd.com>
Date: Tue, 26 Aug 2025 05:10:30 +0000
From: Swapnil Sapkal <swapnil.sapkal@....com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <juri.lelli@...hat.com>,
	<vincent.guittot@...aro.org>, <corbet@....net>
CC: <dietmar.eggemann@....com>, <rostedt@...dmis.org>, <bsegall@...gle.com>,
	<mgorman@...e.de>, <vschneid@...hat.com>, <iamjoonsoo.kim@....com>,
	<qyousef@...alina.io>, <sshegde@...ux.ibm.com>, <alexs@...nel.org>,
	<lukasz.luba@....com>, <cpru@...zon.com>, <gautham.shenoy@....com>,
	<kprateek.nayak@....com>, <ravi.bangoria@....com>, <swapnil.sapkal@....com>,
	<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>
Subject: [PATCH v4 02/11] tools/lib: Add list_is_first()

Add list_is_first() to check whether @list is the first entry in list @head

Signed-off-by: Swapnil Sapkal <swapnil.sapkal@....com>
---
 tools/include/linux/list.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/include/linux/list.h b/tools/include/linux/list.h
index a4dfb6a7cc6a..a692ff7aed5c 100644
--- a/tools/include/linux/list.h
+++ b/tools/include/linux/list.h
@@ -169,6 +169,16 @@ static inline void list_move_tail(struct list_head *list,
 	list_add_tail(list, head);
 }
 
+/**
+ * list_is_first -- tests whether @list is the first entry in list @head
+ * @list: the entry to test
+ * @head: the head of the list
+ */
+static inline int list_is_first(const struct list_head *list, const struct list_head *head)
+{
+	return list->prev == head;
+}
+
 /**
  * list_is_last - tests whether @list is the last entry in list @head
  * @list: the entry to test
-- 
2.43.0