[PATCH v15 04/24] mtd: nand: raw: sunxi: #undef field_{get, prep}() before definition

[Mikhail Kshevetskiy]

Prepare for the advent of globally available common field_get() and
field_prep() macros by undefining the symbols before defining local
variants.  This prevents redefinition warnings from the C preprocessor
when introducing the common macros later.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
---
 drivers/mtd/nand/raw/sunxi_nand.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.h b/drivers/mtd/nand/raw/sunxi_nand.h
index d7a8b3dd40c..b470e1d3368 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.h
+++ b/drivers/mtd/nand/raw/sunxi_nand.h
@@ -26,7 +26,9 @@
 #include <linux/bitops.h>
 
 /* non compile-time field get/prep */
+#undef field_get
 #define field_get(_mask, _reg) (((_reg) & (_mask)) >> (ffs(_mask) - 1))
+#undef field_prep
 #define field_prep(_mask, _val) (((_val) << (ffs(_mask) - 1)) & (_mask))
 
 #define NFC_REG_CTL		0x0000
-- 
2.53.0