ipg.c doesn't compile with with CONFIG_HIGHMEM64G
I've tried to compile 2.6.23-rc8-mm2, but it fails on ipg.c with the
error : ERROR: "__udivdi3" [drivers/net/ipg.ko] undefined!
I've instigated a bit, and I've found this code in ipg.c :
static void ipg_nic_txfree(struct net_device *dev)
{
struct ipg_nic_private *sp = netdev_priv(dev);
void __iomem *ioaddr = sp->ioaddr;
const unsigned int curr = ipg_r32(TFD_LIST_PTR_0) -
(sp->txd_map / sizeof(struct ipg_tx)) - 1;
unsigned int released, pending;
sp->txd_map is an u64
because :
dma_addr_t txd_map;
And in asm-i386/types.h, I see :
#ifdef CONFIG_HIGHMEM64G
typedef u64 dma_addr_t;
#else
typedef u32 dma_addr_t;
#endif
I my config, I use CONFIG_HIGHMEM64G
sizeof(struct ipg_tx) is an u32
So the div failed on i386 because of u64 / u32.
[akpm@linux-foundation.org: cleanups]
Cc: Sorbica Shieh <sorbica@icplus.com.tw>
Cc: Jesse Huang <jesse@icplus.com.tw>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/ipg.c b/drivers/net/ipg.c
index dfdc96f..59898ce 100644
--- a/drivers/net/ipg.c
+++ b/drivers/net/ipg.c
@@ -25,6 +25,8 @@
#include <linux/mii.h>
#include <linux/mutex.h>
+#include <asm/div64.h>
+
#define IPG_RX_RING_BYTES (sizeof(struct ipg_rx) * IPG_RFDLIST_LENGTH)
#define IPG_TX_RING_BYTES (sizeof(struct ipg_tx) * IPG_TFDLIST_LENGTH)
#define IPG_RESET_MASK \
@@ -836,10 +838,14 @@
{
struct ipg_nic_private *sp = netdev_priv(dev);
void __iomem *ioaddr = sp->ioaddr;
- const unsigned int curr = ipg_r32(TFD_LIST_PTR_0) -
- (sp->txd_map / sizeof(struct ipg_tx)) - 1;
+ unsigned int curr;
+ u64 txd_map;
unsigned int released, pending;
+ txd_map = (u64)sp->txd_map;
+ curr = ipg_r32(TFD_LIST_PTR_0) -
+ do_div(txd_map, sizeof(struct ipg_tx)) - 1;
+
IPG_DEBUG_MSG("_nic_txfree\n");
pending = sp->tx_current - sp->tx_dirty;