| Message ID | 1281076034-17390-1-git-send-email-vapier@gentoo.org |
|---|---|
| State | Rejected, archived |
| Delegated to: | David Miller |
| Headers | show |
On Fri, Aug 6, 2010 at 2:27 PM, Mike Frysinger <vapier@gentoo.org> wrote: > If the SMSC phy is not built as a module, we get the warning: > drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not used > > So mark the structure as maybe unused to avoid this. > > Signed-off-by: Mike Frysinger <vapier@gentoo.org> > --- > drivers/net/phy/smsc.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c > index 78fa988..11944ef 100644 > --- a/drivers/net/phy/smsc.c > +++ b/drivers/net/phy/smsc.c > @@ -254,7 +254,7 @@ MODULE_LICENSE("GPL"); > module_init(smsc_init); > module_exit(smsc_exit); > > -static struct mdio_device_id smsc_tbl[] = { > +static __maybe_unused struct mdio_device_id smsc_tbl[] = { > { 0x0007c0a0, 0xfffffff0 }, > { 0x0007c0b0, 0xfffffff0 }, > { 0x0007c0c0, 0xfffffff0 }, How about adding a #ifdef CONFIG_SMSC_PHY_MODULE clause around these lines?
On Friday, August 06, 2010 02:43:46 Changli Gao wrote: > On Fri, Aug 6, 2010 at 2:27 PM, Mike Frysinger <vapier@gentoo.org> wrote: > > If the SMSC phy is not built as a module, we get the warning: > > drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not > > used > > > > So mark the structure as maybe unused to avoid this. > > > > Signed-off-by: Mike Frysinger <vapier@gentoo.org> > > --- > > drivers/net/phy/smsc.c | 2 +- > > 1 files changed, 1 insertions(+), 1 deletions(-) > > > > diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c > > index 78fa988..11944ef 100644 > > --- a/drivers/net/phy/smsc.c > > +++ b/drivers/net/phy/smsc.c > > @@ -254,7 +254,7 @@ MODULE_LICENSE("GPL"); > > module_init(smsc_init); > > module_exit(smsc_exit); > > > > -static struct mdio_device_id smsc_tbl[] = { > > +static __maybe_unused struct mdio_device_id smsc_tbl[] = { > > { 0x0007c0a0, 0xfffffff0 }, > > { 0x0007c0b0, 0xfffffff0 }, > > { 0x0007c0c0, 0xfffffff0 }, > > How about adding a #ifdef CONFIG_SMSC_PHY_MODULE clause around these > lines?
On Friday, August 06, 2010 02:43:46 Changli Gao wrote: > On Fri, Aug 6, 2010 at 2:27 PM, Mike Frysinger wrote: > > If the SMSC phy is not built as a module, we get the warning: > > drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not > > used > > > > So mark the structure as maybe unused to avoid this. > > > > --- a/drivers/net/phy/smsc.c > > +++ b/drivers/net/phy/smsc.c > > @@ -254,7 +254,7 @@ MODULE_LICENSE("GPL"); > > module_init(smsc_init); > > module_exit(smsc_exit); > > > > -static struct mdio_device_id smsc_tbl[] = { > > +static __maybe_unused struct mdio_device_id smsc_tbl[] = { > > { 0x0007c0a0, 0xfffffff0 }, > > { 0x0007c0b0, 0xfffffff0 }, > > { 0x0007c0c0, 0xfffffff0 }, > > How about adding a #ifdef CONFIG_SMSC_PHY_MODULE clause around these > lines? imo, the less ifdefs the better -mike
On Fri, 2010-08-06 at 14:43 +0800, Changli Gao wrote: > On Fri, Aug 6, 2010 at 2:27 PM, Mike Frysinger <vapier@gentoo.org> wrote: > > If the SMSC phy is not built as a module, we get the warning: > > drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not used > > > > So mark the structure as maybe unused to avoid this. > > > > Signed-off-by: Mike Frysinger <vapier@gentoo.org> > > --- > > drivers/net/phy/smsc.c | 2 +- > > 1 files changed, 1 insertions(+), 1 deletions(-) > > > > diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c > > index 78fa988..11944ef 100644 > > --- a/drivers/net/phy/smsc.c > > +++ b/drivers/net/phy/smsc.c > > @@ -254,7 +254,7 @@ MODULE_LICENSE("GPL"); > > module_init(smsc_init); > > module_exit(smsc_exit); > > > > -static struct mdio_device_id smsc_tbl[] = { > > +static __maybe_unused struct mdio_device_id smsc_tbl[] = { > > { 0x0007c0a0, 0xfffffff0 }, > > { 0x0007c0b0, 0xfffffff0 }, > > { 0x0007c0c0, 0xfffffff0 }, > > How about adding a #ifdef CONFIG_SMSC_PHY_MODULE clause around these lines? By default, gcc will discard unused variables and functions declared as static. So this would not provide any run-time benefit. Ben.
From: Ben Hutchings <bhutchings@solarflare.com> Date: Fri, 06 Aug 2010 13:57:15 +0100 > On Fri, 2010-08-06 at 14:43 +0800, Changli Gao wrote: >> On Fri, Aug 6, 2010 at 2:27 PM, Mike Frysinger <vapier@gentoo.org> wrote: >> > If the SMSC phy is not built as a module, we get the warning: >> > drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not used >> > >> > So mark the structure as maybe unused to avoid this. >> > >> > Signed-off-by: Mike Frysinger <vapier@gentoo.org> >> > --- >> > drivers/net/phy/smsc.c | 2 +- >> > 1 files changed, 1 insertions(+), 1 deletions(-) >> > >> > diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c >> > index 78fa988..11944ef 100644 >> > --- a/drivers/net/phy/smsc.c >> > +++ b/drivers/net/phy/smsc.c >> > @@ -254,7 +254,7 @@ MODULE_LICENSE("GPL"); >> > module_init(smsc_init); >> > module_exit(smsc_exit); >> > >> > -static struct mdio_device_id smsc_tbl[] = { >> > +static __maybe_unused struct mdio_device_id smsc_tbl[] = { >> > { 0x0007c0a0, 0xfffffff0 }, >> > { 0x0007c0b0, 0xfffffff0 }, >> > { 0x0007c0c0, 0xfffffff0 }, >> >> How about adding a #ifdef CONFIG_SMSC_PHY_MODULE clause around these lines? > > By default, gcc will discard unused variables and functions declared as > static. So this would not provide any run-time benefit. We never have to do this for any other module device table, because usually the table is actually used for the probing. The MDIO ones are special in that they are only used for assisting in module probing. I would suggest that, in light of this, we make MODULE_DEVICE_TABLE() make a dummy reference to the table. Otherwise we're likely going going to have to add these ugly tags to every single PHY driver. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c index 78fa988..11944ef 100644 --- a/drivers/net/phy/smsc.c +++ b/drivers/net/phy/smsc.c @@ -254,7 +254,7 @@ MODULE_LICENSE("GPL"); module_init(smsc_init); module_exit(smsc_exit); -static struct mdio_device_id smsc_tbl[] = { +static __maybe_unused struct mdio_device_id smsc_tbl[] = { { 0x0007c0a0, 0xfffffff0 }, { 0x0007c0b0, 0xfffffff0 }, { 0x0007c0c0, 0xfffffff0 },
If the SMSC phy is not built as a module, we get the warning: drivers/net/phy/smsc.c:257: warning: 'smsc_tbl' defined but not used So mark the structure as maybe unused to avoid this. Signed-off-by: Mike Frysinger <vapier@gentoo.org> --- drivers/net/phy/smsc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)