powerpc: Replace nvram_* extern declarations with standard header

Remove the nvram_read_byte() and nvram_write_byte() declarations in
powerpc/include/asm/nvram.h and use the cross-platform static functions
in linux/nvram.h instead.
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/powerpc/include/asm/nvram.h

@@ -98,10 +98,4 @@ extern int nvram_write_os_partition(struct nvram_os_partition *part,
 				    unsigned int err_type,
 				    unsigned int error_log_cnt);
 
-/* Determine NVRAM size */
-extern ssize_t nvram_get_size(void);
-
-/* Normal access to NVRAM */
-extern unsigned char nvram_read_byte(int i);
-extern void nvram_write_byte(unsigned char c, int i);
 #endif /* _ASM_POWERPC_NVRAM_H */

arch/powerpc/kernel/setup_32.c

@@ -17,6 +17,7 @@
 #include <linux/console.h>
 #include <linux/memblock.h>
 #include <linux/export.h>
+#include <linux/nvram.h>
 
 #include <asm/io.h>
 #include <asm/prom.h>
@@ -149,30 +150,6 @@ __setup("l3cr=", ppc_setup_l3cr);
 
 #ifdef CONFIG_GENERIC_NVRAM
 
-/* Generic nvram hooks used by drivers/char/gen_nvram.c */
-unsigned char nvram_read_byte(int addr)
-{
-	if (ppc_md.nvram_read_val)
-		return ppc_md.nvram_read_val(addr);
-	return 0xff;
-}
-EXPORT_SYMBOL(nvram_read_byte);
-
-void nvram_write_byte(unsigned char val, int addr)
-{
-	if (ppc_md.nvram_write_val)
-		ppc_md.nvram_write_val(addr, val);
-}
-EXPORT_SYMBOL(nvram_write_byte);
-
-ssize_t nvram_get_size(void)
-{
-	if (ppc_md.nvram_size)
-		return ppc_md.nvram_size();
-	return -1;
-}
-EXPORT_SYMBOL(nvram_get_size);
-
 void nvram_sync(void)
 {
 	if (ppc_md.nvram_sync)

drivers/char/generic_nvram.c

@@ -20,6 +20,7 @@
 #include <linux/fcntl.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
+#include <linux/nvram.h>
 #include <linux/pagemap.h>
 #include <linux/uaccess.h>
 #include <asm/nvram.h>

drivers/video/fbdev/matrox/matroxfb_base.c

@@ -111,12 +111,12 @@
 #include "matroxfb_g450.h"
 #include <linux/matroxfb.h>
 #include <linux/interrupt.h>
+#include <linux/nvram.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 
 #ifdef CONFIG_PPC_PMAC
 #include <asm/machdep.h>
-unsigned char nvram_read_byte(int);
 static int default_vmode = VMODE_NVRAM;
 static int default_cmode = CMODE_NVRAM;
 #endif

include/linux/nvram.h

@@ -15,8 +15,11 @@ extern const struct nvram_ops arch_nvram_ops;
 
 static inline ssize_t nvram_get_size(void)
 {
+#ifdef CONFIG_PPC
+#else
 	if (arch_nvram_ops.get_size)
 		return arch_nvram_ops.get_size();
+#endif
 	return -ENODEV;
 }