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HWRNG: add possibility to remove hwrng devices during suspend/resume

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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>
This commit is contained in:
Rafael J. Wysocki 2008-02-04 22:30:13 -08:00 • committed by Linus Torvalds
parent 533354d4ac
commit a41e3dc406
2 changed files with 14 additions and 6 deletions
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10
include/linux/hw_random.h
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@ -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_ */