OK, I sent this out once before but it must have slipped under the radar. http://lkml.org/lkml/2007/6/28/325 My config fails miserably with lockdep: kernel/lockdep.c: In function 'find_usage_forwards': kernel/lockdep.c:814: error: 'RECURSION_LIMIT' undeclared (first use in this function) kernel/lockdep.c:814: error: (Each undeclared identifier is reported only once kernel/lockdep.c:814: error: for each function it appears in.) kernel/lockdep.c:815: warning: implicit declaration of function 'print_infinite_recursion_bug' kernel/lockdep.c: In function 'find_usage_backwards': kernel/lockdep.c:856: error: 'RECURSION_LIMIT' undeclared (first use in this function) make[1]: *** [kernel/lockdep.o] Error 1 But this patch fixes it nicely. Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx> Index: linux-2.6.22.1-rt9/kernel/lockdep.c =================================================================== --- linux-2.6.22.1-rt9.orig/kernel/lockdep.c 2007-07-31 23:14:12.000000000 -0400 +++ linux-2.6.22.1-rt9/kernel/lockdep.c 2007-07-31 23:25:04.000000000 -0400 @@ -683,6 +683,21 @@ static void print_kernel_version(void) init_utsname()->version); } +#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_TRACE_IRQFLAGS) + +#define RECURSION_LIMIT 40 + +static int noinline print_infinite_recursion_bug(void) +{ + if (!debug_locks_off_graph_unlock()) + return 0; + + WARN_ON(1); + + return 0; +} +#endif /* CONFIG_PROVE_LOCKING || CONFIG_TRACE_IRQFLAGS */ + #ifdef CONFIG_PROVE_LOCKING /* * When a circular dependency is detected, print the @@ -736,18 +751,6 @@ static noinline int print_circular_bug_t return 0; } -#define RECURSION_LIMIT 40 - -static int noinline print_infinite_recursion_bug(void) -{ - if (!debug_locks_off_graph_unlock()) - return 0; - - WARN_ON(1); - - return 0; -} - /* * Prove that the dependency graph starting at <entry> can not * lead to <target>. Print an error and return 0 if it does. @@ -874,6 +877,7 @@ find_usage_backwards(struct lock_class * return 1; } +#ifdef CONFIG_PROVE_LOCKING static int print_bad_irq_dependency(struct task_struct *curr, struct held_lock *prev, @@ -956,6 +960,7 @@ check_usage(struct task_struct *curr, st return print_bad_irq_dependency(curr, prev, next, bit_backwards, bit_forwards, irqclass); } +#endif /* CONFIG_PROVE_LOCKING */ #endif - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
