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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
This commit is contained in:
Thomas Gleixner 2012-05-05 15:05:41 +00:00
parent 6c0a9fa62f
commit 2889f60814
2 changed files with 8 additions and 6 deletions
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6
include/linux/thread_info.h
View File

@ -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

8
kernel/fork.c
View File

@ -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;
}