sh: Various nommu fixes.

This fixes up some of the various outstanding nommu bugs on
SH.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 22 insertions, 10 deletions

diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
index 7074267c01b7..903470429cb4 100644
--- a/arch/sh/boot/compressed/Makefile
+++ b/arch/sh/boot/compressed/Makefile
@@ -21,11 +21,17 @@ endif
 CONFIG_PAGE_OFFSET      ?= 0x80000000
 CONFIG_MEMORY_START     ?= 0x0c000000
 CONFIG_BOOT_LINK_OFFSET ?= 0x00800000
-IMAGE_OFFSET := $(shell printf "0x%8x" $$[$(CONFIG_PAGE_OFFSET)+$(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET)])
+
+IMAGE_OFFSET    := $(shell printf "0x%8x" $$[$(CONFIG_PAGE_OFFSET)  + \
+                                             $(CONFIG_MEMORY_START) + \
+                                             $(CONFIG_BOOT_LINK_OFFSET)])
+
+LIBGCC  := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
 
 LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup -T $(obj)/../../kernel/vmlinux.lds
 
-$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE
+
+$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
         $(call if_changed,ld)
         @:
 
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index d1a979eab656..2c6dc3d8df2c 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -248,8 +248,13 @@ void __init mem_init(void)
          * Setup wrappers for copy/clear_page(), these will get overridden
          * later in the boot process if a better method is available.
          */
+#ifdef CONFIG_MMU
         copy_page = copy_page_slow;
         clear_page = clear_page_slow;
+#else
+        copy_page = copy_page_nommu;
+        clear_page = clear_page_nommu;
+#endif
 
         /* this will put all low memory onto the freelists */
         totalram_pages += free_all_bootmem_node(NODE_DATA(0));
diff --git a/arch/sh/mm/pg-nommu.c b/arch/sh/mm/pg-nommu.c
index 8f9165a4e333..d15221beaa16 100644
--- a/arch/sh/mm/pg-nommu.c
+++ b/arch/sh/mm/pg-nommu.c
@@ -14,23 +14,24 @@
 #include <linux/string.h>
 #include <asm/page.h>
 
-static void copy_page_nommu(void *to, void *from)
+void copy_page_nommu(void *to, void *from)
 {
         memcpy(to, from, PAGE_SIZE);
 }
 
-static void clear_page_nommu(void *to)
+void clear_page_nommu(void *to)
 {
         memset(to, 0, PAGE_SIZE);
 }
 
-static int __init pg_nommu_init(void)
+__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
 {
-        copy_page = copy_page_nommu;
-        clear_page = clear_page_nommu;
-
+        memcpy(to, from, n);
         return 0;
 }
 
-subsys_initcall(pg_nommu_init);
-
+__kernel_size_t __clear_user(void *to, __kernel_size_t n)
+{
+        memset(to, 0, n);
+        return 0;
+}