b844eba292
After 2.6.24 there was a plan to make the PM core acquire all device semaphores during a suspend/hibernation to protect itself from concurrent operations involving device objects. That proved to be too heavy-handed and we found a better way to achieve the goal, but before it happened, we had introduced the functions device_pm_schedule_removal() and destroy_suspended_device() to allow drivers to "safely" destroy a suspended device and we had adapted some drivers to use them. Now that these functions are no longer necessary, it seems reasonable to remove them and modify their users to use the normal device unregistration instead. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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Hardware Random Number Generator
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Please read Documentation/hw_random.txt for details on use.
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----------------------------------------------------------
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This software may be used and distributed according to the terms
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of the GNU General Public License, incorporated herein by reference.
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*/
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#ifndef LINUX_HWRANDOM_H_
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#define LINUX_HWRANDOM_H_
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <linux/list.h>
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/**
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* struct hwrng - Hardware Random Number Generator driver
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* @name: Unique RNG name.
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* @init: Initialization callback (can be NULL).
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* @cleanup: Cleanup callback (can be NULL).
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* @data_present: Callback to determine if data is available
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* on the RNG. If NULL, it is assumed that
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* there is always data available.
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* @data_read: Read data from the RNG device.
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* Returns the number of lower random bytes in "data".
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* Must not be NULL.
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* @priv: Private data, for use by the RNG driver.
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*/
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struct hwrng {
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const char *name;
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int (*init)(struct hwrng *rng);
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void (*cleanup)(struct hwrng *rng);
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int (*data_present)(struct hwrng *rng, int wait);
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int (*data_read)(struct hwrng *rng, u32 *data);
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unsigned long priv;
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/* internal. */
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struct list_head list;
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};
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/** Register a new Hardware Random Number Generator driver. */
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extern int hwrng_register(struct hwrng *rng);
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/** Unregister a Hardware Random Number Generator driver. */
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extern void hwrng_unregister(struct hwrng *rng);
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#endif /* __KERNEL__ */
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#endif /* LINUX_HWRANDOM_H_ */
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