From 4917d927809918f0070bd1077b41e3daf78643b2 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Tue, 17 Jul 2007 04:04:04 -0700 Subject: [PATCH] spidev compiler warning gone Get rid of annoying GCC warning on 32-bit platforms. drivers/spi/spidev.c: In function 'spidev_message': drivers/spi/spidev.c:184: warning: cast to pointer from integer of different size drivers/spi/spidev.c:216: warning: cast to pointer from integer of different size The trick is to add an extra cast using "ptrdiff_t" to convert the u64 to the correct size integer, and only then casting it into a "void *" pointer. Signed-off-by: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/spi/spidev.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index d04242aee40d..38b60ad0eda0 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -181,7 +181,8 @@ static int spidev_message(struct spidev_data *spidev, } if (u_tmp->tx_buf) { k_tmp->tx_buf = buf; - if (copy_from_user(buf, (const u8 __user *)u_tmp->tx_buf, + if (copy_from_user(buf, (const u8 __user *) + (ptrdiff_t) u_tmp->tx_buf, u_tmp->len)) goto done; } @@ -213,7 +214,8 @@ static int spidev_message(struct spidev_data *spidev, buf = spidev->buffer; for (n = n_xfers, u_tmp = u_xfers; n; n--, u_tmp++) { if (u_tmp->rx_buf) { - if (__copy_to_user((u8 __user *)u_tmp->rx_buf, buf, + if (__copy_to_user((u8 __user *) + (ptrdiff_t) u_tmp->rx_buf, buf, u_tmp->len)) { status = -EFAULT; goto done;