When building for ARM64 the following build warning is seen:

drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects 
argument of type 'int', but argument 3 has type 'size_t' [-Wformat=]

Use '%zu' to print 'size_t' format.

Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
---
 drivers/staging/fbtft/fbtft-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/fbtft/fbtft-core.c 
b/drivers/staging/fbtft/fbtft-core.c
index 37dcf7e..b82870b 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -1000,7 +1000,7 @@ int fbtft_register_framebuffer(struct fb_info *fb_info)
        fbtft_sysfs_init(par);
 
        if (par->txbuf.buf)
-               sprintf(text1, ", %d KiB %sbuffer memory",
+               sprintf(text1, ", %zu KiB %sbuffer memory",
                        par->txbuf.len >> 10, par->txbuf.dma ? "DMA " : "");
        if (spi)
                sprintf(text2, ", spi%d.%d at %d MHz", spi->master->bus_num,
-- 
1.9.1

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