[PATCH] ia64: Update to hugetlb

Please find attached a patch that brings in the support of hugetlb
inline with the ia32 tree.  This removes the syscall interface and gets
the hugetlbfs support (using mmap and shmat).  I might be sending you
couple of more small updates a little later.  At least wanted to get
this out first.

arch/ia64/kernel/efi.c

@@ -33,15 +33,6 @@
 
 #define EFI_DEBUG	0
 
-#ifdef CONFIG_HUGETLB_PAGE
-
-/* By default at total of 512MB is reserved huge pages. */
-#define HTLBZONE_SIZE_DEFAULT  0x20000000
-
-unsigned long htlbzone_pages = (HTLBZONE_SIZE_DEFAULT >> HPAGE_SHIFT);
-
-#endif
-
 extern efi_status_t efi_call_phys (void *, ...);
 
 struct efi efi;
@@ -497,25 +488,6 @@ efi_init (void)
 				++cp;
 		}
 	}
-#ifdef CONFIG_HUGETLB_PAGE
-	/* Just duplicating the above algo for lpzone start */
-	for (cp = saved_command_line; *cp; ) {
-		if (memcmp(cp, "lpmem=", 6) == 0) {
-			cp += 6;
-			htlbzone_pages = memparse(cp, &end);
-			htlbzone_pages = (htlbzone_pages >> HPAGE_SHIFT);
-			if (end != cp)
-				break;
-			cp = end;
-		} else {
-			while (*cp != ' ' && *cp)
-				++cp;
-			while (*cp == ' ')
-				++cp;
-		}
-	}
-	printk("Total HugeTLB_Page memory pages requested  0x%lx \n", htlbzone_pages);
-#endif
 	if (mem_limit != ~0UL)
 		printk("Ignoring memory above %luMB\n", mem_limit >> 20);
 

arch/ia64/kernel/entry.S

@@ -1242,8 +1242,8 @@ sys_call_table:
 	data8 sys_sched_setaffinity
 	data8 sys_sched_getaffinity
 	data8 sys_set_tid_address
-	data8 sys_alloc_hugepages
-	data8 sys_free_hugepages		// 1235
+	data8 ia64_ni_syscall
+	data8 ia64_ni_syscall 			// 1235
 	data8 sys_exit_group
 	data8 sys_lookup_dcookie
 	data8 sys_io_setup

arch/ia64/kernel/sys_ia64.c

@@ -21,12 +21,6 @@
 #include <asm/shmparam.h>
 #include <asm/uaccess.h>
 
-#ifdef CONFIG_HUGETLB_PAGE
-# define SHMLBA_HPAGE		HPAGE_SIZE
-# define COLOR_HALIGN(addr)	(((addr) + SHMLBA_HPAGE - 1) & ~(SHMLBA_HPAGE - 1))
-# define TASK_HPAGE_BASE	((REGION_HPAGE << REGION_SHIFT) | HPAGE_SIZE)
-#endif
-
 unsigned long
 arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len,
 			unsigned long pgoff, unsigned long flags)
@@ -37,6 +31,20 @@ arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len
 
 	if (len > RGN_MAP_LIMIT)
 		return -ENOMEM;
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define COLOR_HALIGN(addr) ((addr + HPAGE_SIZE - 1) & ~(HPAGE_SIZE - 1))
+#define TASK_HPAGE_BASE ((REGION_HPAGE << REGION_SHIFT) | HPAGE_SIZE)
+	if (filp && is_file_hugepages(filp)) {
+		if ((REGION_NUMBER(addr) != REGION_HPAGE) || (addr & (HPAGE_SIZE -1)))
+			addr = TASK_HPAGE_BASE;
+		addr = COLOR_HALIGN(addr);
+	}
+	else {
+		if (REGION_NUMBER(addr) == REGION_HPAGE)
+			addr = 0;
+	}
+#endif
 	if (!addr)
 		addr = TASK_UNMAPPED_BASE;
 
@@ -244,80 +252,6 @@ sys_mmap (unsigned long addr, unsigned long len, int prot, int flags, int fd, lo
 	return addr;
 }
 
-#ifdef CONFIG_HUGETLB_PAGE
-
-asmlinkage unsigned long
-sys_alloc_hugepages (int key, unsigned long addr, size_t len, int prot, int flag)
-{
-	struct mm_struct *mm = current->mm;
-	long retval;
-	extern int alloc_hugetlb_pages (int, unsigned long, unsigned long, int, int);
-
-	if ((key < 0) || (len & (HPAGE_SIZE - 1)))
-		return -EINVAL;
-
-	if (addr && ((REGION_NUMBER(addr) != REGION_HPAGE) || (addr & (HPAGE_SIZE - 1))))
-		addr = TASK_HPAGE_BASE;
-
-	if (!addr)
-		addr = TASK_HPAGE_BASE;
-	down_write(&mm->mmap_sem);
-	{
-		retval = arch_get_unmapped_area(NULL, COLOR_HALIGN(addr), len, 0, 0);
-		if (retval != -ENOMEM)
-			retval = alloc_hugetlb_pages(key, retval, len, prot, flag);
-	}
-	up_write(&mm->mmap_sem);
-
-	if (IS_ERR((void *) retval))
-		return retval;
-
-	force_successful_syscall_return();
-	return retval;
-}
-
-asmlinkage int
-sys_free_hugepages (unsigned long  addr)
-{
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-	extern int free_hugepages(struct vm_area_struct *);
-	int retval;
-
-	down_write(&mm->mmap_sem);
-	{
-		vma = find_vma(mm, addr);
-		if (!vma || !is_vm_hugetlb_page(vma) || (vma->vm_start != addr))
-			retval = -EINVAL;
-			goto out;
-
-		spin_lock(&mm->page_table_lock);
-		{
-			retval = free_hugepages(vma);
-		}
-		spin_unlock(&mm->page_table_lock);
-	}
-out:
-	up_write(&mm->mmap_sem);
-	return retval;
-}
-
-#else /* !CONFIG_HUGETLB_PAGE */
-
-asmlinkage unsigned long
-sys_alloc_hugepages (int key, size_t addr, unsigned long len, int prot, int flag)
-{
-	return -ENOSYS;
-}
-
-asmlinkage unsigned long
-sys_free_hugepages (unsigned long  addr)
-{
-	return -ENOSYS;
-}
-
-#endif /* !CONFIG_HUGETLB_PAGE */
-
 asmlinkage unsigned long
 ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags,
 	     unsigned long new_addr)

arch/ia64/mm/init.c

@@ -342,13 +342,6 @@ ia64_mmu_init (void *my_cpu_data)
  * Set up the page tables.
  */
 
-#ifdef CONFIG_HUGETLB_PAGE
-long htlbpagemem;
-int htlbpage_max;
-extern long htlbzone_pages;
-extern struct list_head htlbpage_freelist;
-#endif
-
 #ifdef CONFIG_DISCONTIGMEM
 void
 paging_init (void)
@@ -462,29 +455,4 @@ mem_init (void)
 #ifdef CONFIG_IA32_SUPPORT
 	ia32_gdt_init();
 #endif
-#ifdef CONFIG_HUGETLB_PAGE
-	{
-		long i;
-		int j;
-		struct page *page, *map;
-
-		if ((htlbzone_pages << (HPAGE_SHIFT - PAGE_SHIFT)) >= max_low_pfn)
-			htlbzone_pages = (max_low_pfn >> ((HPAGE_SHIFT - PAGE_SHIFT) + 1));
-		INIT_LIST_HEAD(&htlbpage_freelist);
-		for (i = 0; i < htlbzone_pages; i++) {
-			page = alloc_pages(__GFP_HIGHMEM, HUGETLB_PAGE_ORDER);
-			if (!page)
-				break;
-			map = page;
-			for (j = 0; j < (HPAGE_SIZE/PAGE_SIZE); j++) {
-				SetPageReserved(map);
-				map++;
-			}
-			list_add(&page->list, &htlbpage_freelist);
-		}
-		printk("Total Huge_TLB_Page memory pages allocated %ld \n", i);
-		htlbzone_pages = htlbpagemem = i;
-		htlbpage_max = (int)i;
-	}
-#endif
 }