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ANDROID: random: add back removed callback functions

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Commit 6da877d2d46b ("random: replace custom notifier chain with
standard one") in 5.15.44 removed the add_random_ready_callback() and
del_random_ready_callback() functions, which are part of the current
Android ABI in this branch.  To handle this properly, add them back in
order for out-of-tree code to continue working.

Bug: 161946584
Fixes: 6da877d2d46b ("random: replace custom notifier chain with standard one")
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I422f3af1a28c5cf2e7f7806d6fb37d66901e3a33
This commit is contained in:
Greg Kroah-Hartman
2022-06-24 11:42:55 +02:00
parent 6cc2db3cde
commit fee299e72e
2 changed files with 89 additions and 0 deletions
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13
include/linux/random.h
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@@ -138,4 +138,17 @@ int random_online_cpu(unsigned int cpu);
extern const struct file_operations random_fops, urandom_fops;
#endif
/*
* Android KABI fixups
* Added back the following structure and calls to preserve the ABI for
* out-of-tree drivers that were using them.
*/
struct random_ready_callback {
struct list_head list;
void (*func)(struct random_ready_callback *rdy);
struct module *owner;
};
extern int add_random_ready_callback(struct random_ready_callback *rdy);
extern void del_random_ready_callback(struct random_ready_callback *rdy);
#endif /* _LINUX_RANDOM_H */