Commit-ID: 2889f60814e15dea644782597d897cdba943564f
Gitweb: http://git.kernel.org/tip/2889f60814e15dea644782597d897cdba943564f
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sat, 5 May 2012 15:05:41 +0000
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 8 May 2012 13:55:20 +0200
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@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20120505150141.428211694@xxxxxxxxxxxxx
---
include/linux/thread_info.h | 6 ++++++
kernel/fork.c | 8 ++------
2 files changed, 8 insertions(+), 6 deletions(-)
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 @@ 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
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 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;
}
--
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