From 74444edaa0b2ef946e846d5ddf1ba90efcd7c200 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@kernel.org>
Date: Thu, 2 Feb 2017 20:43:54 +0100
Subject: sched/headers: Move the memalloc_noio_*() APIs to <linux/sched/mm.h>

In preparation to remove the <linux/gfp.h> include from <linux/sched.h>.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 include/linux/sched/mm.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'include/linux/sched')

diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index 64d83fa8d93a..62dca4e0b4e0 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -147,4 +147,26 @@ static inline bool in_vfork(struct task_struct *tsk)
 	return ret;
 }
 
+/* __GFP_IO isn't allowed if PF_MEMALLOC_NOIO is set in current->flags
+ * __GFP_FS is also cleared as it implies __GFP_IO.
+ */
+static inline gfp_t memalloc_noio_flags(gfp_t flags)
+{
+	if (unlikely(current->flags & PF_MEMALLOC_NOIO))
+		flags &= ~(__GFP_IO | __GFP_FS);
+	return flags;
+}
+
+static inline unsigned int memalloc_noio_save(void)
+{
+	unsigned int flags = current->flags & PF_MEMALLOC_NOIO;
+	current->flags |= PF_MEMALLOC_NOIO;
+	return flags;
+}
+
+static inline void memalloc_noio_restore(unsigned int flags)
+{
+	current->flags = (current->flags & ~PF_MEMALLOC_NOIO) | flags;
+}
+
 #endif /* _LINUX_SCHED_MM_H */
-- 
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