From: Jeff Dike <jdike@addtoit.com>
Date: Sat, 10 Feb 2007 09:44:23 +0000 (-0800)
Subject: [PATCH] uml: SIGIO locking comment
X-Git-Tag: v2.6.21-rc1~274^2~392
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9f9d31983aac7764d178583d0777199d081cb1a;p=linux-2.6

[PATCH] uml: SIGIO locking comment

Comment the use of a mysterious-looking lock.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c
index 2b0ab43830..1c831f9ee0 100644
--- a/arch/um/kernel/sigio.c
+++ b/arch/um/kernel/sigio.c
@@ -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)