diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c
index d17ebf616d6e58a077f66451887994c58be28027..1ecece0d7808269f55f1f702f39fb1e45d070566 100644
--- a/drivers/mtd/spi/atmel.c
+++ b/drivers/mtd/spi/atmel.c
@@ -328,7 +328,7 @@ out:
 /*
  * TODO: the two erase funcs (_p2/_at45) should get unified ...
  */
-int dataflash_erase_p2(struct spi_flash *flash, u32 offset, size_t len)
+static int dataflash_erase_p2(struct spi_flash *flash, u32 offset, size_t len)
 {
 	struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
 	unsigned long page_size;
@@ -387,7 +387,7 @@ out:
 	return ret;
 }
 
-int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len)
+static int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len)
 {
 	struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
 	unsigned long page_addr;
diff --git a/drivers/mtd/spi/eon.c b/drivers/mtd/spi/eon.c
index a3640f416fb3de686e2e4881b3bea8ff88c0192e..e3de3aabbdff9d52868b4cc3796332cbecb6d388 100644
--- a/drivers/mtd/spi/eon.c
+++ b/drivers/mtd/spi/eon.c
@@ -119,7 +119,7 @@ static int eon_write(struct spi_flash *flash,
 	return ret;
 }
 
-int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
 }
diff --git a/drivers/mtd/spi/macronix.c b/drivers/mtd/spi/macronix.c
index a0512d1e3a5299a14ffa09e3fa28c0626a906de1..ff66f2aa35c03a522d91094b6d047b40ced13976 100644
--- a/drivers/mtd/spi/macronix.c
+++ b/drivers/mtd/spi/macronix.c
@@ -175,7 +175,7 @@ static int macronix_write(struct spi_flash *flash,
 	return ret;
 }
 
-int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	return spi_flash_cmd_erase(flash, CMD_MX25XX_BE, offset, len);
 }
diff --git a/drivers/mtd/spi/ramtron.c b/drivers/mtd/spi/ramtron.c
index 453dd3f44e27261a7b6d64d121319495a90deb66..078d16ce1bc6d5ec15ec1b15373c575ae51e2ac9 100644
--- a/drivers/mtd/spi/ramtron.c
+++ b/drivers/mtd/spi/ramtron.c
@@ -233,7 +233,7 @@ static int ramtron_write(struct spi_flash *flash,
 		CMD_RAMTRON_WRITE);
 }
 
-int ramtron_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int ramtron_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	debug("SF: Erase of RAMTRON FRAMs is pointless\n");
 	return -1;
diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
index f138d7344ef1bb866245e01d67edfedf9bcef3f5..a3401b32e18570ed58ca19dc8ad440d834a30434 100644
--- a/drivers/mtd/spi/spansion.c
+++ b/drivers/mtd/spi/spansion.c
@@ -196,7 +196,7 @@ static int spansion_write(struct spi_flash *flash,
 	return ret;
 }
 
-int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	return spi_flash_cmd_erase(flash, CMD_S25FLXX_SE, offset, len);
 }
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index 38983bd20387d11a9533600e59d57acf442f9622..0733debc60f6a83d388cf6d5d2b2aec5f6644a95 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -199,7 +199,7 @@ sst_write(struct spi_flash *flash, u32 offset, size_t len, const void *buf)
 	return ret;
 }
 
-int sst_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int sst_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	return spi_flash_cmd_erase(flash, CMD_SST_SE, offset, len);
 }
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
index a1980b1ed78a6da72f6bd149e778b677c9146190..a1959ca984019c9ebcf54752911a9d730ab6cb21 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -197,7 +197,7 @@ static int stmicro_write(struct spi_flash *flash,
 	return ret;
 }
 
-int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
 }
diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c
index 72d94ad216e217a64ff70ffba2e2c381ce96b0f3..e8d30ae2b9d02933a812621e0cdb47511c931bba 100644
--- a/drivers/mtd/spi/winbond.c
+++ b/drivers/mtd/spi/winbond.c
@@ -170,7 +170,7 @@ out:
 	return ret;
 }
 
-int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
 }