linux-kernel - [PATCH 12/29] zorro: use non-racy method for proc entries creation

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Date:	Tue,  8 Apr 2008 15:19:19 +0400
From:	"Denis V. Lunev" <den@...nvz.org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, "Denis V. Lunev" <den@...nvz.org>
Subject: [PATCH 12/29] zorro: use non-racy method for proc entries creation

Use proc_create()/proc_create_data() to make sure that ->proc_fops and
->data be setup before gluing PDE to main tree.

Add correct ->owner to proc_fops to fix reading/module unloading race.

Signed-off-by: Denis V. Lunev <den@...nvz.org>
CC: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 drivers/zorro/proc.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/zorro/proc.c b/drivers/zorro/proc.c
index b7a8c7b..2de70fc 100644
--- a/drivers/zorro/proc.c
+++ b/drivers/zorro/proc.c
@@ -76,6 +76,7 @@ proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *
 }
 
 static const struct file_operations proc_bus_zorro_operations = {
+	.owner		= THIS_MODULE,
 	.llseek		= proc_bus_zorro_lseek,
 	.read		= proc_bus_zorro_read,
 };
@@ -114,11 +115,11 @@ static int __init zorro_proc_attach_device(u_int slot)
 	char name[4];
 
 	sprintf(name, "%02x", slot);
-	entry = create_proc_entry(name, 0, proc_bus_zorro_dir);
+	entry = proc_create_data(name, 0, proc_bus_zorro_dir,
+				 &proc_bus_zorro_operations,
+				 &zorro_autocon[slot]);
 	if (!entry)
 		return -ENOMEM;
-	entry->proc_fops = &proc_bus_zorro_operations;
-	entry->data = &zorro_autocon[slot];
 	entry->size = sizeof(struct zorro_dev);
 	return 0;
 }
-- 
1.5.3.rc5

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