linux-kernel - [PATCH 2/7] UML - SIGIO locking comment

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Message-Id: <200702071947.l17JlhGW006605@ccure.user-mode-linux.org>
Date:	Wed, 07 Feb 2007 14:47:43 -0500
From:	Jeff Dike <jdike@...toit.com>
To:	akpm@...l.org
cc:	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: [PATCH 2/7] UML - SIGIO locking comment

Comment the use of a mysterious-looking lock.

Signed-off-by: Jeff Dike <jdike@...toit.com>
--
 arch/um/kernel/sigio.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6.18-mm/arch/um/kernel/sigio.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/kernel/sigio.c	2007-01-10 15:12:51.000000000 -0500
+++ linux-2.6.18-mm/arch/um/kernel/sigio.c	2007-01-10 15:44:08.000000000 -0500
@@ -42,6 +42,7 @@ int write_sigio_irq(int fd)
 	return(0);
 }
 
+/* These are called from os-Linux/sigio.c to protect its pollfds arrays. */
 static DEFINE_SPINLOCK(sigio_spinlock);
 
 void sigio_lock(void)

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