Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

include/asm-sh/pgalloc.h

@@ -0,0 +1,88 @@
+#ifndef __ASM_SH_PGALLOC_H
+#define __ASM_SH_PGALLOC_H
+
+#include <linux/threads.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+
+#define pgd_quicklist ((unsigned long *)0)
+#define pmd_quicklist ((unsigned long *)0)
+#define pte_quicklist ((unsigned long *)0)
+#define pgtable_cache_size 0L
+
+#define pmd_populate_kernel(mm, pmd, pte) \
+		set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+				struct page *pte)
+{
+	set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
+}
+
+/*
+ * Allocate and free page tables.
+ */
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
+	pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
+
+	if (pgd)
+		memset(pgd, 0, pgd_size);
+
+	return pgd;
+}
+
+static inline void pgd_free(pgd_t *pgd)
+{
+	kfree(pgd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+					  unsigned long address)
+{
+	pte_t *pte;
+
+	pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+
+	return pte;
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+					 unsigned long address)
+{
+	struct page *pte;
+
+   	pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+
+	return pte;
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+	free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct page *pte)
+{
+	__free_page(pte);
+}
+
+#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+
+/*
+ * allocating and freeing a pmd is trivial: the 1-entry pmd is
+ * inside the pgd, so has no extra memory associated with it.
+ */
+
+#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })
+#define pmd_free(x)			do { } while (0)
+#define __pmd_free_tlb(tlb,x)		do { } while (0)
+#define pgd_populate(mm, pmd, pte)	BUG()
+#define check_pgt_cache()		do { } while (0)
+
+#ifdef CONFIG_CPU_SH4
+#define PG_mapped			PG_arch_1
+#endif
+
+#endif /* __ASM_SH_PGALLOC_H */