Revision 95ef1e52922cf75b1ea2eae54ef886f2cc47eecb authored by Avi Kivity on 15 November 2011, 12:59:07 UTC, committed by Avi Kivity on 20 November 2011, 08:53:48 UTC
Prevent tracing of preempt_disable() in get_cpu_var() in kvm_clock_read(). When CONFIG_DEBUG_PREEMPT is enabled, preempt_disable/enable() are traced and this causes the function_graph tracer to go into an infinite recursion. By open coding the preempt_disable() around the get_cpu_var(), we can use the notrace version which prevents preempt_disable/enable() from being traced and prevents the recursion. Based on a similar patch for Xen from Jeremy Fitzhardinge. Tested-by: Gleb Natapov <gleb@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Avi Kivity <avi@redhat.com>
1 parent bb75c62
af_rxrpc.h
/* RxRPC kernel service interface definitions
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* 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.
*/
#ifndef _NET_RXRPC_H
#define _NET_RXRPC_H
#include <linux/rxrpc.h>
struct rxrpc_call;
/*
* the mark applied to socket buffers that may be intercepted
*/
enum {
RXRPC_SKB_MARK_DATA, /* data message */
RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */
RXRPC_SKB_MARK_BUSY, /* server busy message */
RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */
RXRPC_SKB_MARK_NET_ERROR, /* network error message */
RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */
RXRPC_SKB_MARK_NEW_CALL, /* local error message */
};
typedef void (*rxrpc_interceptor_t)(struct sock *, unsigned long,
struct sk_buff *);
extern void rxrpc_kernel_intercept_rx_messages(struct socket *,
rxrpc_interceptor_t);
extern struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *,
struct sockaddr_rxrpc *,
struct key *,
unsigned long,
gfp_t);
extern int rxrpc_kernel_send_data(struct rxrpc_call *, struct msghdr *,
size_t);
extern void rxrpc_kernel_abort_call(struct rxrpc_call *, u32);
extern void rxrpc_kernel_end_call(struct rxrpc_call *);
extern bool rxrpc_kernel_is_data_last(struct sk_buff *);
extern u32 rxrpc_kernel_get_abort_code(struct sk_buff *);
extern int rxrpc_kernel_get_error_number(struct sk_buff *);
extern void rxrpc_kernel_data_delivered(struct sk_buff *);
extern void rxrpc_kernel_free_skb(struct sk_buff *);
extern struct rxrpc_call *rxrpc_kernel_accept_call(struct socket *,
unsigned long);
extern int rxrpc_kernel_reject_call(struct socket *);
#endif /* _NET_RXRPC_H */
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