linux-kernel - [PATCH] genirq: Use AFFINITY and AFFINITY_LIST in write_irq

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Date:   Thu, 28 Oct 2021 20:51:37 +0800
From:   Yunfeng Ye <yeyunfeng@...wei.com>
To:     <tglx@...utronix.de>, <linux-kernel@...r.kernel.org>
CC:     <wuxu.wu@...wei.com>, Hewenliang <hewenliang4@...wei.com>
Subject: [PATCH] genirq: Use AFFINITY and AFFINITY_LIST in
 write_irq_affinity()

The commit 0d3f54257dc3 ("genirq: Introduce effective affinity mask")
introduce AFFINITY and AFFINITY_LIST Enumerated Type, so use it in
write_irq_affinity().

No functional change.

Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
---
 kernel/irq/proc.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index ee595ec09778..423f65203a69 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -147,10 +147,16 @@ static ssize_t write_irq_affinity(int type, struct file *file,
 	if (!zalloc_cpumask_var(&new_value, GFP_KERNEL))
 		return -ENOMEM;

-	if (type)
+	switch (type) {
+	case AFFINITY_LIST:
 		err = cpumask_parselist_user(buffer, count, new_value);
-	else
+		break;
+	case AFFINITY:
 		err = cpumask_parse_user(buffer, count, new_value);
+		break;
+	default:
+		err = -EINVAL;
+	}
 	if (err)
 		goto free_cpumask;

@@ -179,13 +185,13 @@ static ssize_t write_irq_affinity(int type, struct file *file,
 static ssize_t irq_affinity_proc_write(struct file *file,
 		const char __user *buffer, size_t count, loff_t *pos)
 {
-	return write_irq_affinity(0, file, buffer, count, pos);
+	return write_irq_affinity(AFFINITY, file, buffer, count, pos);
 }

 static ssize_t irq_affinity_list_proc_write(struct file *file,
 		const char __user *buffer, size_t count, loff_t *pos)
 {
-	return write_irq_affinity(1, file, buffer, count, pos);
+	return write_irq_affinity(AFFINITY_LIST, file, buffer, count, pos);
 }

 static int irq_affinity_proc_open(struct inode *inode, struct file *file)
-- 
2.27.0