mtd: fix Orion NAND driver compilation with ARM OABI

[pandora-kernel.git] / drivers / mtd / nand / orion_nand.c

diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index f59c074..d60fc57 100644 (file)
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -60,7 +60,13 @@ static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
        }
        buf64 = (uint64_t *)buf;
        while (i < len/8) {
-               uint64_t x;
+               /*
+                * Since GCC has no proper constraint (PR 43518)
+                * force x variable to r2/r3 registers as ldrd instruction
+                * requires first register to be even.
+                */
+               register uint64_t x asm ("r2");
+
                asm volatile ("ldrd\t%0, [%1]" : "=&r" (x) : "r" (io_base));
                buf64[i++] = x;
        }