Merge branch 'rework/threaded-printk' into for-linus

}

/*

 * Legacy console printing from printk() caller context does not respect

 * raw_spinlock/spinlock nesting. For !PREEMPT_RT the lockdep warning is a

 * false positive. For PREEMPT_RT the false positive condition does not

 * occur.

 *

 * This map is used to temporarily establish LD_WAIT_SLEEP context for the

 * console write() callback when legacy printing to avoid false positive

 * lockdep complaints, thus allowing lockdep to continue to function for

 * real issues.

 * The legacy console always acquires a spinlock_t from its printing

 * callback. This violates lock nesting if the caller acquired an always

 * spinning lock (raw_spinlock_t) while invoking printk(). This is not a

 * problem on PREEMPT_RT because legacy consoles print always from a

 * dedicated thread and never from within printk(). Therefore we tell

 * lockdep that a sleeping spin lock (spinlock_t) is valid here.

 */

#ifdef CONFIG_PREEMPT_RT

static inline void printk_legacy_allow_spinlock_enter(void) { }

static inline void printk_legacy_allow_spinlock_exit(void) { }

#else

static DEFINE_WAIT_OVERRIDE_MAP(printk_legacy_map, LD_WAIT_SLEEP);

static DEFINE_WAIT_OVERRIDE_MAP(printk_legacy_map, LD_WAIT_CONFIG);

static inline void printk_legacy_allow_spinlock_enter(void)

{