From a41e3dc4060cca2599afa14fbd4c745763746ba8 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Mon, 4 Feb 2008 22:30:13 -0800
Subject: HWRNG: add possibility to remove hwrng devices during suspend/resume

Make it possible to unregister a Hardware Random Number Generator
device object in a safe way during a suspend/resume cycle.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Michael Buesch <mb@bu3sch.de>
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/hw_random.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'include/linux/hw_random.h')

diff --git a/include/linux/hw_random.h b/include/linux/hw_random.h
index 85d11916e9ea..42131820bb89 100644
--- a/include/linux/hw_random.h
+++ b/include/linux/hw_random.h
@@ -44,7 +44,15 @@ struct hwrng {
 /** Register a new Hardware Random Number Generator driver. */
 extern int hwrng_register(struct hwrng *rng);
 /** Unregister a Hardware Random Number Generator driver. */
-extern void hwrng_unregister(struct hwrng *rng);
+extern void __hwrng_unregister(struct hwrng *rng, bool suspended);
+static inline void hwrng_unregister(struct hwrng *rng)
+{
+	__hwrng_unregister(rng, false);
+}
+static inline void hwrng_unregister_suspended(struct hwrng *rng)
+{
+	__hwrng_unregister(rng, true);
+}
 
 #endif /* __KERNEL__ */
 #endif /* LINUX_HWRANDOM_H_ */
-- 
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