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spidev compiler warning gone

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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 <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Brownell 2007-07-17 04:04:04 -07:00 committed by Linus Torvalds
parent ad241528c4
commit 4917d92780
1 changed files with 4 additions and 2 deletions
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6
drivers/spi/spidev.c
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@ -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;