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Revision 5f630401f9e98bd062733b5bbef096dbf2158066 authored by Tiejun Chen on 22 August 2012, 16:10:20 UTC, committed by Benjamin Herrenschmidt on 24 August 2012, 10:26:06 UTC 
powerpc/kgdb: Restore current_thread_info properly
 
For powerpc BooKE and e200, singlestep is handled on the critical/dbg
exception stack. This causes current_thread_info() to fail for kgdb
internal, so previously We work around this issue by copying
the thread_info from the kernel stack before calling kgdb_handle_exception,
and copying it back afterwards.

But actually we don't do this properly. We should backup current_thread_info
then restore that when exit.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
1 parent 949616c
Raw File
iostat.h 
/*
 *  linux/fs/nfs/iostat.h
 *
 *  Declarations for NFS client per-mount statistics
 *
 *  Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
 *
 */

#ifndef _NFS_IOSTAT
#define _NFS_IOSTAT

#include <linux/percpu.h>
#include <linux/cache.h>
#include <linux/nfs_iostat.h>

struct nfs_iostats {
	unsigned long long	bytes[__NFSIOS_BYTESMAX];
#ifdef CONFIG_NFS_FSCACHE
	unsigned long long	fscache[__NFSIOS_FSCACHEMAX];
#endif
	unsigned long		events[__NFSIOS_COUNTSMAX];
} ____cacheline_aligned;

static inline void nfs_inc_server_stats(const struct nfs_server *server,
					enum nfs_stat_eventcounters stat)
{
	this_cpu_inc(server->io_stats->events[stat]);
}

static inline void nfs_inc_stats(const struct inode *inode,
				 enum nfs_stat_eventcounters stat)
{
	nfs_inc_server_stats(NFS_SERVER(inode), stat);
}

static inline void nfs_add_server_stats(const struct nfs_server *server,
					enum nfs_stat_bytecounters stat,
					long addend)
{
	this_cpu_add(server->io_stats->bytes[stat], addend);
}

static inline void nfs_add_stats(const struct inode *inode,
				 enum nfs_stat_bytecounters stat,
				 long addend)
{
	nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
}

#ifdef CONFIG_NFS_FSCACHE
static inline void nfs_add_fscache_stats(struct inode *inode,
					 enum nfs_stat_fscachecounters stat,
					 long addend)
{
	this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend);
}
#endif

static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
{
	return alloc_percpu(struct nfs_iostats);
}

static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
{
	if (stats != NULL)
		free_percpu(stats);
}

#endif /* _NFS_IOSTAT */
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