The patch titled
lockdep: sanitise CONFIG_PROVE_LOCKING
has been added to the -mm tree. Its filename is
lockdep-sanitise-config_prove_locking.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: lockdep: sanitise CONFIG_PROVE_LOCKING
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
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@xxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Acked-by: Jason Baron <jbaron@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/lockdep.c | 13 ++++++++++++-
kernel/spinlock.c | 4 ++--
2 files changed, 14 insertions(+), 3 deletions(-)
diff -puN kernel/lockdep.c~lockdep-sanitise-config_prove_locking kernel/lockdep.c
--- a/kernel/lockdep.c~lockdep-sanitise-config_prove_locking
+++ a/kernel/lockdep.c
@@ -95,6 +95,7 @@ static int lockdep_initialized;
unsigned long nr_list_entries;
static struct lock_list list_entries[MAX_LOCKDEP_ENTRIES];
+#ifdef CONFIG_PROVE_LOCKING
/*
* Allocate a lockdep entry. (assumes the graph_lock held, returns
* with NULL on failure)
@@ -111,6 +112,7 @@ static struct lock_list *alloc_list_entr
}
return list_entries + nr_list_entries++;
}
+#endif
/*
* 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];
unsigned long nr_lock_chains;
+#ifdef CONFIG_PROVE_LOCKING
static struct lock_chain lock_chains[MAX_LOCKDEP_CHAINS];
+#endif
/*
* We put the lock dependency chains into a hash-table as well, to cache
@@ -482,6 +486,7 @@ static void print_lock_dependencies(stru
}
}
+#ifdef CONFIG_PROVE_LOCKING
/*
* Add a new dependency to the head of the list:
*/
@@ -541,6 +546,7 @@ print_circular_bug_entry(struct lock_lis
return 0;
}
+#endif
static void print_kernel_version(void)
{
@@ -549,6 +555,7 @@ static void print_kernel_version(void)
init_utsname()->version);
}
+#ifdef CONFIG_PROVE_LOCKING
/*
* When a circular dependency is detected, print the
* header first:
@@ -639,6 +646,7 @@ check_noncircular(struct lock_class *sou
}
return 1;
}
+#endif
static int very_verbose(struct lock_class *class)
{
@@ -823,6 +831,7 @@ check_usage(struct task_struct *curr, st
#endif
+#ifdef CONFIG_PROVE_LOCKING
static int
print_deadlock_bug(struct task_struct *curr, struct held_lock *prev,
struct held_lock *next)
@@ -1087,7 +1096,7 @@ out_bug:
return 0;
}
-
+#endif
/*
* Is this the address of a static object:
@@ -1307,6 +1316,7 @@ out_unlock_set:
return class;
}
+#ifdef CONFIG_PROVE_LOCKING
/*
* 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
@@ -1381,6 +1391,7 @@ cache_hit:
return 1;
}
+#endif
/*
* We are building curr_chain_key incrementally, so double-check
diff -puN kernel/spinlock.c~lockdep-sanitise-config_prove_locking kernel/spinlock.c
--- a/kernel/spinlock.c~lockdep-sanitise-config_prove_locking
+++ a/kernel/spinlock.c
@@ -88,7 +88,7 @@ unsigned long __lockfunc _spin_lock_irqs
* _raw_spin_lock_flags() code, because lockdep assumes
* that interrupts are not re-enabled during lock-acquire:
*/
-#ifdef CONFIG_PROVE_LOCKING
+#ifdef CONFIG_LOCKDEP
_raw_spin_lock(lock);
#else
_raw_spin_lock_flags(lock, &flags);
@@ -305,7 +305,7 @@ unsigned long __lockfunc _spin_lock_irqs
* _raw_spin_lock_flags() code, because lockdep assumes
* that interrupts are not re-enabled during lock-acquire:
*/
-#ifdef CONFIG_PROVE_SPIN_LOCKING
+#ifdef CONFIG_LOCKDEP
_raw_spin_lock(lock);
#else
_raw_spin_lock_flags(lock, &flags);
_
Patches currently in -mm which might be from a.p.zijlstra@xxxxxxxxx are
lumpy-reclaim-v4.patch
split-mmap.patch
only-allow-nonlinear-vmas-for-ram-backed-filesystems.patch
percpu_counters-use-cpu-notifiers.patch
percpu_counters-use-for_each_online_cpu.patch
fix-raw_spinlock_t-vs-lockdep.patch
lockdep-sanitise-config_prove_locking.patch
lockdep-reduce-the-ifdeffery.patch
lockstat-core-infrastructure.patch
lockstat-human-readability-tweaks.patch
lockstat-hook-into-spinlock_t-rwlock_t-rwsem-and-mutex.patch
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