[PATCH] mutex subsystem, more debugging code

more mutex debugging: check for held locks during memory freeing,
task exit, enable sysrq printouts, etc.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>

2 files changed, 4 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e0e84924171b..a5e6891f7bb6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -415,6 +415,9 @@ static void __free_pages_ok(struct page *page, unsigned int order)
         int reserved = 0;
 
         arch_free_page(page, order);
+        if (!PageHighMem(page))
+                mutex_debug_check_no_locks_freed(page_address(page),
+                        page_address(page+(1<<order)));
 
 #ifndef CONFIG_MMU
         for (i = 1 ; i < (1 << order) ; ++i)
diff --git a/mm/slab.c b/mm/slab.c
index 1c46c6383552..33aab345cd4a 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3071,6 +3071,7 @@ void kfree(const void *objp)
         local_irq_save(flags);
         kfree_debugcheck(objp);
         c = page_get_cache(virt_to_page(objp));
+        mutex_debug_check_no_locks_freed(objp, objp+obj_reallen(c));
         __cache_free(c, (void *)objp);
         local_irq_restore(flags);
 }