tracing: Fix hwlat kthread migration

The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

path: root/net/mac80211/aes_cmac.h

/*
 * Copyright 2008, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef AES_CMAC_H
#define AES_CMAC_H

#include <linux/crypto.h>

void gf_mulx(u8 *pad);
void aes_cmac_vector(struct crypto_cipher *tfm, size_t num_elem,
		     const u8 *addr[], const size_t *len, u8 *mac,
		     size_t mac_len);
struct crypto_cipher *ieee80211_aes_cmac_key_setup(const u8 key[],
						   size_t key_len);
void ieee80211_aes_cmac(struct crypto_cipher *tfm, const u8 *aad,
			const u8 *data, size_t data_len, u8 *mic);
void ieee80211_aes_cmac_256(struct crypto_cipher *tfm, const u8 *aad,
			    const u8 *data, size_t data_len, u8 *mic);
void ieee80211_aes_cmac_key_free(struct crypto_cipher *tfm);

#endif /* AES_CMAC_H */