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Commit 2889f608 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20120505150141.428211694@linutronix.de
parent 6c0a9fa6

include/linux/thread_info.h

+6 −0
Original line number Diff line number Diff line
@@ -54,6 +54,12 @@ extern long do_no_restart_syscall(struct restart_block *parm); 


#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

kernel/fork.c

+2 −6
Original line number Diff line number Diff line
@@ -123,12 +123,8 @@ static struct kmem_cache *task_struct_cachep; 
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;

}