[RFC v5 19/26] nvram: Drop nvram_* symbol exports and prototypes

[Finn Thain <fthain@telegraphics.com.au>]

Drivers now use the arch_nvram_ops calls so remove the function exports and
prototypes. nvram_check_checksum() is unused so remove it.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>

---
 arch/m68k/atari/nvram.c |    6 +++---
 drivers/char/nvram.c    |   27 +++++----------------------
 include/linux/nvram.h   |    8 --------
 3 files changed, 8 insertions(+), 33 deletions(-)

Index: linux/drivers/char/nvram.c
===================================================================
--- linux.orig/drivers/char/nvram.c	2015-07-25 17:45:42.000000000 +1000
+++ linux/drivers/char/nvram.c	2015-07-25 17:45:47.000000000 +1000
@@ -82,13 +82,12 @@ static ssize_t nvram_size;
  * periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
  */
 
-unsigned char __nvram_read_byte(int i)
+static unsigned char __nvram_read_byte(int i)
 {
 	return CMOS_READ(NVRAM_FIRST_BYTE + i);
 }
-EXPORT_SYMBOL(__nvram_read_byte);
 
-unsigned char nvram_read_byte(int i)
+static unsigned char nvram_read_byte(int i)
 {
 	unsigned long flags;
 	unsigned char c;
@@ -98,16 +97,14 @@ unsigned char nvram_read_byte(int i)
 	spin_unlock_irqrestore(&rtc_lock, flags);
 	return c;
 }
-EXPORT_SYMBOL(nvram_read_byte);
 
 /* This races nicely with trying to read with checksum checking (nvram_read) */
-void __nvram_write_byte(unsigned char c, int i)
+static void __nvram_write_byte(unsigned char c, int i)
 {
 	CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
 }
-EXPORT_SYMBOL(__nvram_write_byte);
 
-void nvram_write_byte(unsigned char c, int i)
+static void nvram_write_byte(unsigned char c, int i)
 {
 	unsigned long flags;
 
@@ -115,14 +112,13 @@ void nvram_write_byte(unsigned char c, i
 	__nvram_write_byte(c, i);
 	spin_unlock_irqrestore(&rtc_lock, flags);
 }
-EXPORT_SYMBOL(nvram_write_byte);
 
 /* On PCs, the checksum is built only over bytes 2..31 */
 #define PC_CKS_RANGE_START	2
 #define PC_CKS_RANGE_END	31
 #define PC_CKS_LOC		32
 
-int __nvram_check_checksum(void)
+static int __nvram_check_checksum(void)
 {
 	int i;
 	unsigned short sum = 0;
@@ -134,19 +130,6 @@ int __nvram_check_checksum(void)
 	    __nvram_read_byte(PC_CKS_LOC+1);
 	return (sum & 0xffff) == expect;
 }
-EXPORT_SYMBOL(__nvram_check_checksum);
-
-int nvram_check_checksum(void)
-{
-	unsigned long flags;
-	int rv;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	rv = __nvram_check_checksum();
-	spin_unlock_irqrestore(&rtc_lock, flags);
-	return rv;
-}
-EXPORT_SYMBOL(nvram_check_checksum);
 
 static void __nvram_set_checksum(void)
 {
Index: linux/include/linux/nvram.h
===================================================================
--- linux.orig/include/linux/nvram.h	2015-07-25 17:45:42.000000000 +1000
+++ linux/include/linux/nvram.h	2015-07-25 17:45:47.000000000 +1000
@@ -3,14 +3,6 @@
 
 #include <uapi/linux/nvram.h>
 
-/* __foo is foo without grabbing the rtc_lock - get it yourself */
-extern unsigned char __nvram_read_byte(int i);
-extern unsigned char nvram_read_byte(int i);
-extern void __nvram_write_byte(unsigned char c, int i);
-extern void nvram_write_byte(unsigned char c, int i);
-extern int __nvram_check_checksum(void);
-extern int nvram_check_checksum(void);
-
 struct nvram_ops {
 	ssize_t         (*read)(char *, size_t, loff_t *);
 	ssize_t         (*write)(char *, size_t, loff_t *);
Index: linux/arch/m68k/atari/nvram.c
===================================================================
--- linux.orig/arch/m68k/atari/nvram.c	2015-07-25 17:45:36.000000000 +1000
+++ linux/arch/m68k/atari/nvram.c	2015-07-25 17:45:47.000000000 +1000
@@ -33,13 +33,13 @@
  * periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
  */
 
-unsigned char __nvram_read_byte(int i)
+static unsigned char __nvram_read_byte(int i)
 {
 	return CMOS_READ(NVRAM_FIRST_BYTE + i);
 }
 
 /* This races nicely with trying to read with checksum checking */
-void __nvram_write_byte(unsigned char c, int i)
+static void __nvram_write_byte(unsigned char c, int i)
 {
 	CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
 }
@@ -51,7 +51,7 @@ void __nvram_write_byte(unsigned char c,
 #define ATARI_CKS_RANGE_END	47
 #define ATARI_CKS_LOC		48
 
-int __nvram_check_checksum(void)
+static int __nvram_check_checksum(void)
 {
 	int i;
 	unsigned char sum = 0;