In order to print a 'size_t' type the '%zu' specifier needs to be used.

Change it accordingly in order to fix the following build warning:

drivers/staging/kpc2000/kpc_dma/fileops.c:57:35: warning: format '%ld' expects 
argument of type 'long int', but argument 8 has type 'size_t {aka unsigned 
int}' [-Wformat=]

Reported-by: Build bot for Mark Brown <broo...@kernel.org>
Signed-off-by: Fabio Estevam <feste...@gmail.com>
---
 drivers/staging/kpc2000/kpc_dma/fileops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c 
b/drivers/staging/kpc2000/kpc_dma/fileops.c
index aec60382e403..fdec1ab25dfd 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -54,7 +54,7 @@ int  kpc_dma_transfer(struct dev_private_data *priv, struct 
kiocb *kcb, unsigned
        ldev = priv->ldev;
        BUG_ON(ldev == NULL);
 
-       dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base 
= [%p], iov_len = %ld) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, 
iov_len, ldev);
+       dev_dbg(&priv->ldev->pldev->dev, "%s(priv = [%p], kcb = [%p], iov_base 
= [%p], iov_len = %zu) ldev = [%p]\n", __func__, priv, kcb, (void *)iov_base, 
iov_len, ldev);
 
        acd = kzalloc(sizeof(*acd), GFP_KERNEL);
        if (!acd) {
-- 
2.17.1

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