/********************************************************************* * * Filename: irqueue.h * Version: 0.3 * Description: General queue implementation * Status: Experimental. * Author: Dag Brattli * Created at: Tue Jun 9 13:26:50 1998 * Modified at: Thu Oct 7 13:25:16 1999 * Modified by: Dag Brattli * * Copyright (C) 1998-1999, Aage Kvalnes * Copyright (c) 1998, Dag Brattli * All Rights Reserved. * * This code is taken from the Vortex Operating System written by Aage * Kvalnes and has been ported to Linux and Linux/IR by Dag Brattli * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * Neither Dag Brattli nor University of Tromsø admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. * ********************************************************************/ #include #include #ifndef IRDA_QUEUE_H #define IRDA_QUEUE_H #define NAME_SIZE 32 /* * Hash types (some flags can be xored) * See comments in irqueue.c for which one to use... */ #define HB_NOLOCK 0 /* No concurent access prevention */ #define HB_LOCK 1 /* Prevent concurent write with global lock */ /* * Hash defines */ #define HASHBIN_SIZE 8 #define HASHBIN_MASK 0x7 #ifndef IRDA_ALIGN #define IRDA_ALIGN __attribute__((aligned)) #endif #define Q_NULL { NULL, NULL, "", 0 } typedef void (*FREE_FUNC)(void *arg); struct irda_queue { struct irda_queue *q_next; struct irda_queue *q_prev; char q_name[NAME_SIZE]; long q_hash; /* Must be able to cast a (void *) */ }; typedef struct irda_queue irda_queue_t; typedef struct hashbin_t { __u32 magic; int hb_type; int hb_size; spinlock_t hb_spinlock; /* HB_LOCK - Can be used by the user */ irda_queue_t* hb_queue[HASHBIN_SIZE] IRDA_ALIGN; irda_queue_t* hb_current; } hashbin_t; hashbin_t *hashbin_new(int type); int hashbin_delete(hashbin_t* hashbin, FREE_FUNC func); int hashbin_clear(hashbin_t* hashbin, FREE_FUNC free_func); void hashbin_insert(hashbin_t* hashbin, irda_queue_t* entry, long hashv, const char* name); void* hashbin_remove(hashbin_t* hashbin, long hashv, const char* name); void* hashbin_remove_first(hashbin_t *hashbin); void* hashbin_remove_this( hashbin_t* hashbin, irda_queue_t* entry); void* hashbin_find(hashbin_t* hashbin, long hashv, const char* name); void* hashbin_lock_find(hashbin_t* hashbin, long hashv, const char* name); void* hashbin_find_next(hashbin_t* hashbin, long hashv, const char* name, void ** pnext); irda_queue_t *hashbin_get_first(hashbin_t *hashbin); irda_queue_t *hashbin_get_next(hashbin_t *hashbin); #define HASHBIN_GET_SIZE(hashbin) hashbin->hb_size #endif 1910cf645a0468307'>root/tools/perf/Documentation/intel-bts.txt
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authorThomas Gleixner <tglx@linutronix.de>2017-01-10 14:01:05 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-16 13:20:05 +0100
commit4205e4786d0b9fc3b4fec7b1910cf645a0468307 (patch)
tree685ccb486409197b936c785eb9d173c3edff45a1 /tools/perf/Documentation/intel-bts.txt
parent7e164ce4e8ecd7e9a58a83750bd3ee03125df154 (diff)
cpu/hotplug: Provide dynamic range for prepare stage
Mathieu reported that the LTTNG modules are broken as of 4.10-rc1 due to the removal of the cpu hotplug notifiers. Usually I don't care much about out of tree modules, but LTTNG is widely used in distros. There are two ways to solve that: 1) Reserve a hotplug state for LTTNG 2) Add a dynamic range for the prepare states. While #1 is the simplest solution, #2 is the proper one as we can convert in tree users, which do not care about ordering, to the dynamic range as well. Add a dynamic range which allows LTTNG to request states in the prepare stage. Reported-and-tested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Sewior <bigeasy@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701101353010.3401@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'tools/perf/Documentation/intel-bts.txt')