net: tulip: turn compile-time warning into dev_warn()

commit de92718883ddbcd11b738d36ffcf57617b97fa12 upstream.

The tulip driver causes annoying build-time warnings for allmodconfig
builds for all recent architectures:

dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined
dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined!

This is the last remaining warning for arm64, and I'd like to get rid of
it. We don't really know the cache line size, architecturally it would
be at least 16 bytes, but all implementations I found have 64 or 128
bytes. Configuring tulip for 32-byte lines as we do on ARM32 seems to
be the safe but slow default, and nobody who cares about performance these
days would use a tulip chip anyway, so we can just use that.

To save the next person the job of trying to find out what this is for
and picking a default for their architecture just to kill off the warning,
I'm now removing the preprocessor #warning and turning it into a pr_warn
or dev_warn that prints the equivalent information when the driver gets
loaded.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/ethernet/dec/tulip/tulip_core.c b/drivers/net/ethernet/dec/tulip/tulip_core.c
index 861660841ce281c23a5790e62942a779998b5209..eab3142bd795be7392c49d0b96bd9a45352110cb 100644 (file)
--- a/drivers/net/ethernet/dec/tulip/tulip_core.c
+++ b/drivers/net/ethernet/dec/tulip/tulip_core.c
@@ -98,8 +98,7 @@ static int csr0 = 0x01A00000 | 0x4800;
 #elif defined(__mips__)
 static int csr0 = 0x00200000 | 0x4000;
 #else
-#warning Processor architecture undefined!
-static int csr0 = 0x00A00000 | 0x4800;
+static int csr0;
 #endif
 
 /* Operational parameters that usually are not changed. */
@@ -1982,6 +1981,12 @@ static int __init tulip_init (void)
        pr_info("%s", version);
 #endif
 
+       if (!csr0) {
+               pr_warn("tulip: unknown CPU architecture, using default csr0\n");
+               /* default to 8 longword cache line alignment */
+               csr0 = 0x00A00000 | 0x4800;
+       }
+
        /* copy module parms into globals */
        tulip_rx_copybreak = rx_copybreak;
        tulip_max_interrupt_work = max_interrupt_work;

diff --git a/drivers/net/ethernet/dec/tulip/winbond-840.c b/drivers/net/ethernet/dec/tulip/winbond-840.c
index 62fe512bb2167fb682f63e26e2678e6a5df0cb6d..345f2fe8755c05382e55aa715368ac3fa63b5955 100644 (file)
--- a/drivers/net/ethernet/dec/tulip/winbond-840.c
+++ b/drivers/net/ethernet/dec/tulip/winbond-840.c
@@ -907,7 +907,7 @@ static void init_registers(struct net_device *dev)
 #elif defined(CONFIG_SPARC) || defined (CONFIG_PARISC)
        i |= 0x4800;
 #else
-#warning Processor architecture undefined
+       dev_warn(&dev->dev, "unknown CPU architecture, using default csr0 setting\n");
        i |= 0x4800;
 #endif
        iowrite32(i, ioaddr + PCIBusCfg);