Hi Herbert, On Wed, Mar 11, 2015 at 09:59:57PM +1100, Herbert Xu wrote: > On Mon, Mar 09, 2015 at 10:36:36AM -0700, Dmitry Torokhov wrote: > > Instead of using #ifdefs let's mark suspend and resume methods as > > __maybe_unused which will suppress compiler warnings about them being > > unused and provide better compile coverage. This will not increase image > > size. > > > > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> > > --- > > drivers/char/hw_random/omap-rng.c | 15 +++------------ > > 1 file changed, 3 insertions(+), 12 deletions(-) > > > > diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c > > index 7f3597d..5c171b1 100644 > > --- a/drivers/char/hw_random/omap-rng.c > > +++ b/drivers/char/hw_random/omap-rng.c > > @@ -422,9 +422,7 @@ static int omap_rng_remove(struct platform_device *pdev) > > return 0; > > } > > > > -#ifdef CONFIG_PM_SLEEP > > - > > -static int omap_rng_suspend(struct device *dev) > > +static int __maybe_unused omap_rng_suspend(struct device *dev) > > { > > struct omap_rng_dev *priv = dev_get_drvdata(dev); > > > > @@ -434,7 +432,7 @@ static int omap_rng_suspend(struct device *dev) > > return 0; > > } > > > > -static int omap_rng_resume(struct device *dev) > > +static int __maybe_unused omap_rng_resume(struct device *dev) > > { > > struct omap_rng_dev *priv = dev_get_drvdata(dev); > > > > @@ -445,18 +443,11 @@ static int omap_rng_resume(struct device *dev) > > } > > > > static SIMPLE_DEV_PM_OPS(omap_rng_pm, omap_rng_suspend, omap_rng_resume); > > -#define OMAP_RNG_PM (&omap_rng_pm) > > - > > -#else > > - > > -#define OMAP_RNG_PM NULL > > - > > -#endif > > > > static struct platform_driver omap_rng_driver = { > > .driver = { > > .name = "omap_rng", > > - .pm = OMAP_RNG_PM, > > + .pm = &omap_rng_pm, > > This will cause omap_rng_suspend/omap_rng_resume to be referenced > always, thus rendering the __maybe_unused moot, no? SIMPLE_DEV_PM_OPS() produces an empty omap_rng_pm structure in case of !CONFIG_PM_SLEEP so neither omap_rng_suspend nor omap_rng_resume will end up being referenced. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html