Messages in this thread | | | Date | Tue, 12 Jun 2007 19:17:07 +0530 | From | "debian developer" <> | Subject | Re: [patch 1/4] lockdep: variuos fixes |
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What exactly is being copyright'ed here?
On 6/12/07, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote: > - update the copyright notices > - use the default hash function > - fix a thinko in a BUILD_BUG_ON > - add a WARN_ON to spot inconsitent naming > - fix a termination issue in /proc/lock_stat > > Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> > Acked-by: Ingo Molnar <mingo@elte.hu> > --- > include/linux/lockdep.h | 3 ++- > kernel/lockdep.c | 20 +++++++++++--------- > kernel/lockdep_proc.c | 6 +++++- > 3 files changed, 18 insertions(+), 11 deletions(-) > > Index: linux-2.6/kernel/lockdep.c > =================================================================== > --- linux-2.6.orig/kernel/lockdep.c > +++ linux-2.6/kernel/lockdep.c > @@ -5,7 +5,8 @@ > * > * Started by Ingo Molnar: > * > - * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> > + * Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> > + * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> > * > * this code maps all the lock dependencies as they occur in a live kernel > * and will warn about the following classes of locking bugs: > @@ -37,6 +38,7 @@ > #include <linux/debug_locks.h> > #include <linux/irqflags.h> > #include <linux/utsname.h> > +#include <linux/hash.h> > > #include <asm/sections.h> > > @@ -238,8 +240,7 @@ LIST_HEAD(all_lock_classes); > */ > #define CLASSHASH_BITS (MAX_LOCKDEP_KEYS_BITS - 1) > #define CLASSHASH_SIZE (1UL << CLASSHASH_BITS) > -#define CLASSHASH_MASK (CLASSHASH_SIZE - 1) > -#define __classhashfn(key) ((((unsigned long)key >> CLASSHASH_BITS) + (unsigned long)key) & CLASSHASH_MASK) > +#define __classhashfn(key) hash_long((unsigned long)key, CLASSHASH_BITS) > #define classhashentry(key) (classhash_table + __classhashfn((key))) > > static struct list_head classhash_table[CLASSHASH_SIZE]; > @@ -250,9 +251,7 @@ static struct list_head classhash_table[ > */ > #define CHAINHASH_BITS (MAX_LOCKDEP_CHAINS_BITS-1) > #define CHAINHASH_SIZE (1UL << CHAINHASH_BITS) > -#define CHAINHASH_MASK (CHAINHASH_SIZE - 1) > -#define __chainhashfn(chain) \ > - (((chain >> CHAINHASH_BITS) + chain) & CHAINHASH_MASK) > +#define __chainhashfn(chain) hash_long(chain, CHAINHASH_BITS) > #define chainhashentry(chain) (chainhash_table + __chainhashfn((chain))) > > static struct list_head chainhash_table[CHAINHASH_SIZE]; > @@ -680,7 +679,7 @@ look_up_lock_class(struct lockdep_map *l > * (or spin_lock_init()) call - which acts as the key. For static > * locks we use the lock object itself as the key. > */ > - BUILD_BUG_ON(sizeof(struct lock_class_key) > sizeof(struct lock_class)); > + BUILD_BUG_ON(sizeof(struct lock_class_key) > sizeof(struct lockdep_map)); > > key = lock->key->subkeys + subclass; > > @@ -690,9 +689,12 @@ look_up_lock_class(struct lockdep_map *l > * We can walk the hash lockfree, because the hash only > * grows, and we are careful when adding entries to the end: > */ > - list_for_each_entry(class, hash_head, hash_entry) > - if (class->key == key) > + list_for_each_entry(class, hash_head, hash_entry) { > + if (class->key == key) { > + WARN_ON_ONCE(class->name != lock->name); > return class; > + } > + } > > return NULL; > } > Index: linux-2.6/include/linux/lockdep.h > =================================================================== > --- linux-2.6.orig/include/linux/lockdep.h > +++ linux-2.6/include/linux/lockdep.h > @@ -1,7 +1,8 @@ > /* > * Runtime locking correctness validator > * > - * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> > + * Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> > + * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> > * > * see Documentation/lockdep-design.txt for more details. > */ > Index: linux-2.6/kernel/lockdep_proc.c > =================================================================== > --- linux-2.6.orig/kernel/lockdep_proc.c > +++ linux-2.6/kernel/lockdep_proc.c > @@ -5,7 +5,8 @@ > * > * Started by Ingo Molnar: > * > - * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> > + * Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> > + * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> > * > * Code for /proc/lockdep and /proc/lockdep_stats: > * > @@ -498,6 +499,9 @@ static void *ls_start(struct seq_file *m > if (data->iter == data->stats) > seq_header(m); > > + if (data->iter == data->iter_end) > + data->iter = NULL; > + > return data->iter; > } > > > -- > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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