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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
cache_lib.h 
/*
 * Helper routines for the NFS client caches
 *
 * Copyright (c) 2009 Trond Myklebust <Trond.Myklebust@netapp.com>
 */

#include <linux/completion.h>
#include <linux/sunrpc/cache.h>
#include <linux/atomic.h>

/*
 * Deferred request handling
 */
struct nfs_cache_defer_req {
	struct cache_req req;
	struct cache_deferred_req deferred_req;
	struct completion completion;
	atomic_t count;
};

extern int nfs_cache_upcall(struct cache_detail *cd, char *entry_name);
extern struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void);
extern void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq);
extern int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq);

extern void nfs_cache_init(struct cache_detail *cd);
extern void nfs_cache_destroy(struct cache_detail *cd);
extern int nfs_cache_register_net(struct net *net, struct cache_detail *cd);
extern void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd);
extern int nfs_cache_register_sb(struct super_block *sb,
				 struct cache_detail *cd);
extern void nfs_cache_unregister_sb(struct super_block *sb,
				    struct cache_detail *cd);
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