fork: Move thread info gfp flags to header
These flags can be useful for extra allocations outside of the core
code.
Add __GFP_NOTRACK to them, so the archs which have kmemcheck do
not have to provide extra allocators just for that reason.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20120505150141.428211694@linutronix.de
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index 8d03f07..db78775 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -54,6 +54,12 @@
#ifdef __KERNEL__
+#ifdef CONFIG_DEBUG_STACK_USAGE
+# define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO)
+#else
+# define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK)
+#endif
+
/*
* flag set/clear/test wrappers
* - pass TIF_xxxx constants to these functions
diff --git a/kernel/fork.c b/kernel/fork.c
index a79b36e..5d22b9b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -123,12 +123,8 @@
static struct thread_info *alloc_thread_info_node(struct task_struct *tsk,
int node)
{
-#ifdef CONFIG_DEBUG_STACK_USAGE
- gfp_t mask = GFP_KERNEL | __GFP_ZERO;
-#else
- gfp_t mask = GFP_KERNEL;
-#endif
- struct page *page = alloc_pages_node(node, mask, THREAD_SIZE_ORDER);
+ struct page *page = alloc_pages_node(node, THREADINFO_GFP,
+ THREAD_SIZE_ORDER);
return page ? page_address(page) : NULL;
}
