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
osd_sec.h
/*
* osd_sec.h - OSD security manager API
*
* Copyright (C) 2008 Panasas Inc. All rights reserved.
*
* Authors:
* Boaz Harrosh <bharrosh@panasas.com>
* Benny Halevy <bhalevy@panasas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
*
*/
#ifndef __OSD_SEC_H__
#define __OSD_SEC_H__
#include "osd_protocol.h"
#include "osd_types.h"
/*
* Contains types and constants of osd capabilities and security
* encoding/decoding.
* API is trying to keep security abstract so initiator of an object
* based pNFS client knows as little as possible about security and
* capabilities. It is the Server's osd-initiator place to know more.
* Also can be used by osd-target.
*/
void osd_sec_encode_caps(void *caps, ...);/* NI */
void osd_sec_init_nosec_doall_caps(void *caps,
const struct osd_obj_id *obj, bool is_collection, const bool is_v1);
bool osd_is_sec_alldata(struct osd_security_parameters *sec_params);
/* Conditionally sign the CDB according to security setting in ocdb
* with cap_key */
void osd_sec_sign_cdb(struct osd_cdb *ocdb, const u8 *cap_key);
/* Unconditionally sign the BIO data with cap_key.
* Check for osd_is_sec_alldata() was done prior to calling this. */
void osd_sec_sign_data(void *data_integ, struct bio *bio, const u8 *cap_key);
/* Version independent copy of caps into the cdb */
void osd_set_caps(struct osd_cdb *cdb, const void *caps);
#endif /* ndef __OSD_SEC_H__ */
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