Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 102 insertions, 0 deletions

diff --git a/kernel/arch/avr32/include/asm/pgalloc.h b/kernel/arch/avr32/include/asm/pgalloc.h
new file mode 100644
index 000000000..1aba19d68
--- /dev/null
+++ b/kernel/arch/avr32/include/asm/pgalloc.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_PGALLOC_H
+#define __ASM_AVR32_PGALLOC_H
+
+#include <linux/mm.h>
+#include <linux/quicklist.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+#define QUICK_PGD	0	/* Preserve kernel mappings over free */
+#define QUICK_PT	1	/* Zero on free */
+
+static inline void pmd_populate_kernel(struct mm_struct *mm,
+				       pmd_t *pmd, pte_t *pte)
+{
+	set_pmd(pmd, __pmd((unsigned long)pte));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+				    pgtable_t pte)
+{
+	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+static inline void pgd_ctor(void *x)
+{
+	pgd_t *pgd = x;
+
+	memcpy(pgd + USER_PTRS_PER_PGD,
+		swapper_pg_dir + USER_PTRS_PER_PGD,
+		(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+}
+
+/*
+ * Allocate and free page tables
+ */
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
+}
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+	quicklist_free(QUICK_PGD, NULL, pgd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+					  unsigned long address)
+{
+	return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+}
+
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
+					 unsigned long address)
+{
+	struct page *page;
+	void *pg;
+
+	pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+	if (!pg)
+		return NULL;
+
+	page = virt_to_page(pg);
+	if (!pgtable_page_ctor(page)) {
+		quicklist_free(QUICK_PT, NULL, pg);
+		return NULL;
+	}
+
+	return page;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+	quicklist_free(QUICK_PT, NULL, pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+	pgtable_page_dtor(pte);
+	quicklist_free_page(QUICK_PT, NULL, pte);
+}
+
+#define __pte_free_tlb(tlb,pte,addr)			\
+do {							\
+	pgtable_page_dtor(pte);				\
+	tlb_remove_page((tlb), pte);			\
+} while (0)
+
+static inline void check_pgt_cache(void)
+{
+	quicklist_trim(QUICK_PGD, NULL, 25, 16);
+	quicklist_trim(QUICK_PT, NULL, 25, 16);
+}
+
+#endif /* __ASM_AVR32_PGALLOC_H */