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lockdep: sanitise CONFIG_PROVE_LOCKING

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Ensure that all of the lock dependency tracking code is under
CONFIG_PROVE_LOCKING.  This allows us to use the held lock tracking code for
other purposes.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra 2007-07-19 01:48:53 -07:00 committed by Linus Torvalds
parent 21f8ca3bf6
commit ca58abcb4a
2 changed files with 14 additions and 3 deletions
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13
kernel/lockdep.c
View file

@ -95,6 +95,7 @@ static int lockdep_initialized;
unsigned long nr_list_entries; unsigned long nr_list_entries;
static struct lock_list list_entries[MAX_LOCKDEP_ENTRIES]; static struct lock_list list_entries[MAX_LOCKDEP_ENTRIES];
#ifdef CONFIG_PROVE_LOCKING
/* /*
* Allocate a lockdep entry. (assumes the graph_lock held, returns * Allocate a lockdep entry. (assumes the graph_lock held, returns
* with NULL on failure) * with NULL on failure)
@ -111,6 +112,7 @@ static struct lock_list *alloc_list_entry(void)
} }
return list_entries + nr_list_entries++; return list_entries + nr_list_entries++;
} }
#endif
/* /*
* All data structures here are protected by the global debug_lock. * All data structures here are protected by the global debug_lock.
@ -140,7 +142,9 @@ LIST_HEAD(all_lock_classes);
static struct list_head classhash_table[CLASSHASH_SIZE]; static struct list_head classhash_table[CLASSHASH_SIZE];
unsigned long nr_lock_chains; unsigned long nr_lock_chains;
#ifdef CONFIG_PROVE_LOCKING
static struct lock_chain lock_chains[MAX_LOCKDEP_CHAINS]; static struct lock_chain lock_chains[MAX_LOCKDEP_CHAINS];
#endif
/* /*
* We put the lock dependency chains into a hash-table as well, to cache * We put the lock dependency chains into a hash-table as well, to cache
@ -482,6 +486,7 @@ static void print_lock_dependencies(struct lock_class *class, int depth)
} }
} }
#ifdef CONFIG_PROVE_LOCKING
/* /*
* Add a new dependency to the head of the list: * Add a new dependency to the head of the list:
*/ */
@ -541,6 +546,7 @@ print_circular_bug_entry(struct lock_list *target, unsigned int depth)
return 0; return 0;
} }
#endif
static void print_kernel_version(void) static void print_kernel_version(void)
{ {
@ -549,6 +555,7 @@ static void print_kernel_version(void)
init_utsname()->version); init_utsname()->version);
} }
#ifdef CONFIG_PROVE_LOCKING
/* /*
* When a circular dependency is detected, print the * When a circular dependency is detected, print the
* header first: * header first:
@ -639,6 +646,7 @@ check_noncircular(struct lock_class *source, unsigned int depth)
} }
return 1; return 1;
} }
#endif
static int very_verbose(struct lock_class *class) static int very_verbose(struct lock_class *class)
{ {
@ -823,6 +831,7 @@ check_usage(struct task_struct *curr, struct held_lock *prev,
#endif #endif
#ifdef CONFIG_PROVE_LOCKING
static int static int
print_deadlock_bug(struct task_struct *curr, struct held_lock *prev, print_deadlock_bug(struct task_struct *curr, struct held_lock *prev,
struct held_lock *next) struct held_lock *next)
@ -1087,7 +1096,7 @@ out_bug:
return 0; return 0;
} }
#endif
/* /*
* Is this the address of a static object: * Is this the address of a static object:
@ -1307,6 +1316,7 @@ out_unlock_set:
return class; return class;
} }
#ifdef CONFIG_PROVE_LOCKING
/* /*
* Look up a dependency chain. If the key is not present yet then * Look up a dependency chain. If the key is not present yet then
* add it and return 1 - in this case the new dependency chain is * add it and return 1 - in this case the new dependency chain is
@ -1381,6 +1391,7 @@ cache_hit:
return 1; return 1;
} }
#endif
/* /*
* We are building curr_chain_key incrementally, so double-check * We are building curr_chain_key incrementally, so double-check

4
kernel/spinlock.c
View file

@ -88,7 +88,7 @@ unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
* _raw_spin_lock_flags() code, because lockdep assumes * _raw_spin_lock_flags() code, because lockdep assumes
* that interrupts are not re-enabled during lock-acquire: * that interrupts are not re-enabled during lock-acquire:
*/ */
#ifdef CONFIG_PROVE_LOCKING #ifdef CONFIG_LOCKDEP
_raw_spin_lock(lock); _raw_spin_lock(lock);
#else #else
_raw_spin_lock_flags(lock, &flags); _raw_spin_lock_flags(lock, &flags);
@ -305,7 +305,7 @@ unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclas
* _raw_spin_lock_flags() code, because lockdep assumes * _raw_spin_lock_flags() code, because lockdep assumes
* that interrupts are not re-enabled during lock-acquire: * that interrupts are not re-enabled during lock-acquire:
*/ */
#ifdef CONFIG_PROVE_SPIN_LOCKING #ifdef CONFIG_LOCKDEP
_raw_spin_lock(lock); _raw_spin_lock(lock);
#else #else
_raw_spin_lock_flags(lock, &flags); _raw_spin_lock_flags(lock, &flags);