| Paul E. McKenney | e260be6 | 2008-01-25 21:08:24 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Read-Copy Update mechanism for mutual exclusion (RT implementation) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | * |
| 18 | * Copyright (C) IBM Corporation, 2006 |
| 19 | * |
| 20 | * Author: Paul McKenney <paulmck@us.ibm.com> |
| 21 | * |
| 22 | * Based on the original work by Paul McKenney <paul.mckenney@us.ibm.com> |
| 23 | * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen. |
| 24 | * Papers: |
| 25 | * http://www.rdrop.com/users/paulmck/paper/rclockpdcsproof.pdf |
| 26 | * http://lse.sourceforge.net/locking/rclock_OLS.2001.05.01c.sc.pdf (OLS2001) |
| 27 | * |
| 28 | * For detailed explanation of the Preemptible Read-Copy Update mechanism see - |
| 29 | * http://lwn.net/Articles/253651/ |
| 30 | */ |
| 31 | |
| 32 | #ifndef __LINUX_RCUPREEMPT_TRACE_H |
| 33 | #define __LINUX_RCUPREEMPT_TRACE_H |
| 34 | |
| 35 | #ifdef __KERNEL__ |
| 36 | #include <linux/types.h> |
| 37 | #include <linux/kernel.h> |
| 38 | |
| 39 | #include <asm/atomic.h> |
| 40 | |
| 41 | /* |
| 42 | * PREEMPT_RCU data structures. |
| 43 | */ |
| 44 | |
| 45 | struct rcupreempt_trace { |
| 46 | long next_length; |
| 47 | long next_add; |
| 48 | long wait_length; |
| 49 | long wait_add; |
| 50 | long done_length; |
| 51 | long done_add; |
| 52 | long done_remove; |
| 53 | atomic_t done_invoked; |
| 54 | long rcu_check_callbacks; |
| 55 | atomic_t rcu_try_flip_1; |
| 56 | atomic_t rcu_try_flip_e1; |
| 57 | long rcu_try_flip_i1; |
| 58 | long rcu_try_flip_ie1; |
| 59 | long rcu_try_flip_g1; |
| 60 | long rcu_try_flip_a1; |
| 61 | long rcu_try_flip_ae1; |
| 62 | long rcu_try_flip_a2; |
| 63 | long rcu_try_flip_z1; |
| 64 | long rcu_try_flip_ze1; |
| 65 | long rcu_try_flip_z2; |
| 66 | long rcu_try_flip_m1; |
| 67 | long rcu_try_flip_me1; |
| 68 | long rcu_try_flip_m2; |
| 69 | }; |
| 70 | |
| 71 | #ifdef CONFIG_RCU_TRACE |
| 72 | #define RCU_TRACE(fn, arg) fn(arg); |
| 73 | #else |
| 74 | #define RCU_TRACE(fn, arg) |
| 75 | #endif |
| 76 | |
| 77 | extern void rcupreempt_trace_move2done(struct rcupreempt_trace *trace); |
| 78 | extern void rcupreempt_trace_move2wait(struct rcupreempt_trace *trace); |
| 79 | extern void rcupreempt_trace_try_flip_1(struct rcupreempt_trace *trace); |
| 80 | extern void rcupreempt_trace_try_flip_e1(struct rcupreempt_trace *trace); |
| 81 | extern void rcupreempt_trace_try_flip_i1(struct rcupreempt_trace *trace); |
| 82 | extern void rcupreempt_trace_try_flip_ie1(struct rcupreempt_trace *trace); |
| 83 | extern void rcupreempt_trace_try_flip_g1(struct rcupreempt_trace *trace); |
| 84 | extern void rcupreempt_trace_try_flip_a1(struct rcupreempt_trace *trace); |
| 85 | extern void rcupreempt_trace_try_flip_ae1(struct rcupreempt_trace *trace); |
| 86 | extern void rcupreempt_trace_try_flip_a2(struct rcupreempt_trace *trace); |
| 87 | extern void rcupreempt_trace_try_flip_z1(struct rcupreempt_trace *trace); |
| 88 | extern void rcupreempt_trace_try_flip_ze1(struct rcupreempt_trace *trace); |
| 89 | extern void rcupreempt_trace_try_flip_z2(struct rcupreempt_trace *trace); |
| 90 | extern void rcupreempt_trace_try_flip_m1(struct rcupreempt_trace *trace); |
| 91 | extern void rcupreempt_trace_try_flip_me1(struct rcupreempt_trace *trace); |
| 92 | extern void rcupreempt_trace_try_flip_m2(struct rcupreempt_trace *trace); |
| 93 | extern void rcupreempt_trace_check_callbacks(struct rcupreempt_trace *trace); |
| 94 | extern void rcupreempt_trace_done_remove(struct rcupreempt_trace *trace); |
| 95 | extern void rcupreempt_trace_invoke(struct rcupreempt_trace *trace); |
| 96 | extern void rcupreempt_trace_next_add(struct rcupreempt_trace *trace); |
| 97 | |
| 98 | #endif /* __KERNEL__ */ |
| 99 | #endif /* __LINUX_RCUPREEMPT_TRACE_H */ |