Merge branch 'sh/pgtable' of git://github.com/mfleming/linux-2.6

arch/sh/include/asm/pgalloc.h

@@ -6,10 +6,13 @@
 
 #define QUICK_PT 1	/* Other page table pages that are zero on free */
 
+extern pgd_t *pgd_alloc(struct mm_struct *);
+extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+
 #ifdef CONFIG_PGTABLE_LEVELS_3
-#include <asm/pgalloc_pmd.h>
+extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
-#else
+extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
-#include <asm/pgalloc_nopmd.h>
+extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
 #endif
 
 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
@@ -67,7 +70,6 @@ do {							\
 
 static inline void check_pgt_cache(void)
 {
-	__check_pgt_cache();
 	quicklist_trim(QUICK_PT, NULL, 25, 16);
 }
 

arch/sh/include/asm/pgalloc_nopmd.h

@@ -1,30 +0,0 @@
-#ifndef __ASM_SH_PGALLOC_NOPMD_H
-#define __ASM_SH_PGALLOC_NOPMD_H
-
-#define QUICK_PGD 0	/* We preserve special mappings over free */
-
-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));
-}
-
-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 void __check_pgt_cache(void)
-{
-	quicklist_trim(QUICK_PGD, NULL, 25, 16);
-}
-
-#endif /* __ASM_SH_PGALLOC_NOPMD_H */

arch/sh/include/asm/pgalloc_pmd.h

@@ -1,41 +0,0 @@
-#ifndef __ASM_SH_PGALLOC_PMD_H
-#define __ASM_SH_PGALLOC_PMD_H
-
-static inline pgd_t *pgd_alloc(struct mm_struct *mm)
-{
-	pgd_t *pgd;
-	int i;
-
-	pgd = kzalloc(sizeof(*pgd) * PTRS_PER_PGD, GFP_KERNEL | __GFP_REPEAT);
-
-	for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++)
-		pgd[i] = swapper_pg_dir[i];
-
-	return pgd;
-}
-
-static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
-{
-	kfree(pgd);
-}
-
-static inline void __check_pgt_cache(void)
-{
-}
-
-static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
-{
-	set_pud(pud, __pud((unsigned long)pmd));
-}
-
-static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
-{
-	return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
-}
-
-static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
-{
-	quicklist_free(QUICK_PT, NULL, pmd);
-}
-
-#endif /* __ASM_SH_PGALLOC_PMD_H */

arch/sh/include/asm/pgtable.h

@@ -141,9 +141,9 @@ typedef pte_t *pte_addr_t;
 #define pte_pfn(x)		((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
 
 /*
- * No page table caches to initialise
+ * Initialise the page table caches
  */
-#define pgtable_cache_init()	do { } while (0)
+extern void pgtable_cache_init(void);
 
 struct vm_area_struct;
 

arch/sh/include/asm/pgtable_64.h

@@ -43,11 +43,6 @@ static __inline__ void set_pte(pte_t *pteptr, pte_t pteval)
 }
 #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
 
-static __inline__ void pmd_set(pmd_t *pmdp,pte_t *ptep)
-{
-	pmd_val(*pmdp) = (unsigned long) ptep;
-}
-
 /*
  * PGD defines. Top level.
  */
@@ -202,12 +197,6 @@ static __inline__ void pmd_set(pmd_t *pmdp,pte_t *ptep)
 #define pgprot_noncached(x) __pgprot(((x).pgprot & ~(_PAGE_CACHABLE)) | _PAGE_DEVICE)
 #define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE)
 
-/*
- * Handling allocation failures during page table setup.
- */
-extern void __handle_bad_pmd_kernel(pmd_t * pmd);
-#define __handle_bad_pmd(x)	__handle_bad_pmd_kernel(x)
-
 /*
  * PTE level access routines.
  *

arch/sh/include/asm/pgtable_pmd.h

@@ -17,11 +17,11 @@
 #define USER_PTRS_PER_PGD	2
 
 /* PMD bits */
-#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - 3))
+#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
 #define PMD_SIZE	(1UL << PMD_SHIFT)
 #define PMD_MASK	(~(PMD_SIZE-1))
 
-#define PTRS_PER_PMD	(PAGE_SIZE / sizeof(pmd_t))
+#define PTRS_PER_PMD	((1 << PGDIR_SHIFT) / PMD_SIZE)
 
 #define pmd_ERROR(e) \
 	printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))

arch/sh/mm/Kconfig

@@ -219,7 +219,7 @@ config PAGE_SIZE_4KB
 
 config PAGE_SIZE_8KB
 	bool "8kB"
-	depends on !MMU || X2TLB && !PGTABLE_LEVELS_3
+	depends on !MMU || X2TLB
 	help
 	  This enables 8kB pages as supported by SH-X2 and later MMUs.
 
@@ -231,7 +231,7 @@ config PAGE_SIZE_16KB
 
 config PAGE_SIZE_64KB
 	bool "64kB"
-	depends on !MMU || CPU_SH4 && !PGTABLE_LEVELS_3 || CPU_SH5
+	depends on !MMU || CPU_SH4 || CPU_SH5
 	help
 	  This enables support for 64kB pages, possible on all SH-4
 	  CPUs and later.

arch/sh/mm/Makefile

@@ -15,7 +15,7 @@ obj-y			+= $(cacheops-y)
 
 mmu-y			:= nommu.o extable_32.o
 mmu-$(CONFIG_MMU)	:= extable_$(BITS).o fault_$(BITS).o \
-			   ioremap_$(BITS).o kmap.o tlbflush_$(BITS).o
+			   ioremap_$(BITS).o kmap.o pgtable.o tlbflush_$(BITS).o
 
 obj-y			+= $(mmu-y)
 obj-$(CONFIG_DEBUG_FS)	+= asids-debugfs.o

arch/sh/mm/cache-sh4.c

@@ -109,6 +109,7 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys)
 static void sh4_flush_dcache_page(void *arg)
 {
 	struct page *page = arg;
+	unsigned long addr = (unsigned long)page_address(page);
 #ifndef CONFIG_SMP
 	struct address_space *mapping = page_mapping(page);
 
@@ -116,16 +117,8 @@ static void sh4_flush_dcache_page(void *arg)
 		set_bit(PG_dcache_dirty, &page->flags);
 	else
 #endif
-	{
+		flush_cache_one(CACHE_OC_ADDRESS_ARRAY |
-		unsigned long phys = page_to_phys(page);
+				(addr & shm_align_mask), page_to_phys(page));
-		unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
-		int i, n;
-
-		/* Loop all the D-cache */
-		n = boot_cpu_data.dcache.n_aliases;
-		for (i = 0; i < n; i++, addr += PAGE_SIZE)
-			flush_cache_one(addr, phys);
-	}
 
 	wmb();
 }

arch/sh/mm/pgtable.c

@@ -0,0 +1,57 @@
+#include <linux/mm.h>
+
+#define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO
+
+static struct kmem_cache *pgd_cachep;
+
+#ifdef CONFIG_PGTABLE_LEVELS_3
+static struct kmem_cache *pmd_cachep;
+#endif
+
+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));
+}
+
+void pgtable_cache_init(void)
+{
+	pgd_cachep = kmem_cache_create("pgd_cache",
+				       PTRS_PER_PGD * (1<<PTE_MAGNITUDE),
+				       PAGE_SIZE, SLAB_PANIC, pgd_ctor);
+#ifdef CONFIG_PGTABLE_LEVELS_3
+	pmd_cachep = kmem_cache_create("pmd_cache",
+				       PTRS_PER_PMD * (1<<PTE_MAGNITUDE),
+				       PAGE_SIZE, SLAB_PANIC, NULL);
+#endif
+}
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP);
+}
+
+void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+	kmem_cache_free(pgd_cachep, pgd);
+}
+
+#ifdef CONFIG_PGTABLE_LEVELS_3
+void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+	set_pud(pud, __pud((unsigned long)pmd));
+}
+
+pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP);
+}
+
+void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+	kmem_cache_free(pmd_cachep, pmd);
+}
+#endif /* CONFIG_PGTABLE_LEVELS_3 */