[patch 03/18] fork: Move thread info gfp flags to header

[Thomas Gleixner]

These flags can be useful for extra allocations outside of the core
code.

Add __GFP_NOTRACE 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@xxxxxxxxxxxxx>
---
 include/linux/thread_info.h |    6 ++++++
 kernel/fork.c               |    8 ++------
 2 files changed, 8 insertions(+), 6 deletions(-)

Index: tip/include/linux/thread_info.h
===================================================================
--- tip.orig/include/linux/thread_info.h
+++ tip/include/linux/thread_info.h
@@ -54,6 +54,12 @@ extern long do_no_restart_syscall(struct
 
 #ifdef __KERNEL__
 
+#ifdef CONFIG_DEBUG_STACK_USAGE
+# define THREADINFO_GFP		(GFP_KERNEL | __GFP_NOTRACE | __GFP_ZERO)
+#else
+# define THREADINFO_GFP		(GFP_KERNEL | __GFP_NOTRACE)
+#endif
+
 /*
  * flag set/clear/test wrappers
  * - pass TIF_xxxx constants to these functions
Index: tip/kernel/fork.c
===================================================================
--- tip.orig/kernel/fork.c
+++ tip/kernel/fork.c
@@ -135,12 +135,8 @@ void __weak arch_release_thread_info(str
 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;
 }


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