Message-ID: <4007EAE7.2030104@in.ibm.com>
Date: Fri, 16 Jan 2004 19:15:11 +0530
From: Prashanth T <prasht@in.ibm.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax)
MIME-Version: 1.0
To: rml@tech9.net
CC: linux-kernel@vger.kernel.org
Subject: [PATCH] rwlock_is_locked undefined for UP systems
Content-Type: multipart/mixed;
 boundary="------------040103070504000600070506"
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1494
Lines: 44

This is a multi-part message in MIME format.
--------------040103070504000600070506
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Hi,
    I had to use rwlock_is_locked( ) with linux2.6 for kdb and noticed that
this routine to be undefined for UP.  I have attached the patch for 2.6.1
below to return 0 for rwlock_is_locked( ) on UP systems.
Please let me know.

Thanks
Prashanth


--------------040103070504000600070506
Content-Type: text/plain;
 name="rwlock-check-UP.patch"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="rwlock-check-UP.patch"

diff -urN linux-2.6.1/include/linux/spinlock.h linux-2.6.1-rwlock-patch/include/linux/spinlock.h
--- linux-2.6.1/include/linux/spinlock.h	2004-01-09 12:29:33.000000000 +0530
+++ linux-2.6.1-rwlock-patch/include/linux/spinlock.h	2004-01-16 18:15:10.000000000 +0530
@@ -176,6 +176,7 @@
 #endif
 
 #define rwlock_init(lock)	do { (void)(lock); } while(0)
+#define rwlock_is_locked(lock)  ((void)(lock), 0)
 #define _raw_read_lock(lock)	do { (void)(lock); } while(0)
 #define _raw_read_unlock(lock)	do { (void)(lock); } while(0)
 #define _raw_write_lock(lock)	do { (void)(lock); } while(0)

--------------040103070504000600070506--

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/