Messages in this thread | | | Date | Sat, 21 May 2011 08:48:45 +0200 | From | Jean Delvare <> | Subject | Re: [PATCH] check_signature depends on CONFIG_CHECK_SIGNATURE |
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Hi Andrew,
On Fri, 20 May 2011 15:11:13 -0700, Andrew Morton wrote: > On Fri, 20 May 2011 16:14:48 +0200 > Jean Delvare <khali@linux-fr.org> wrote: > > > check_signature() is only available if CONFIG_CHECK_SIGNATURE has been > > selected. Don't declare the function if it won't be available at link > > time. That way, any failure to select CONFIG_CHECK_SIGNATURE as needed > > will show up immediately at build time. > > > > Signed-off-by: Jean Delvare <khali@linux-fr.org> > > --- > > include/linux/io.h | 5 ++++- > > 1 file changed, 4 insertions(+), 1 deletion(-) > > > > --- linux-2.6.40-rc0.orig/include/linux/io.h 2011-05-20 10:41:02.000000000 +0200 > > +++ linux-2.6.40-rc0/include/linux/io.h 2011-05-20 16:00:31.000000000 +0200 > > @@ -63,8 +63,11 @@ void __iomem *devm_ioremap(struct device > > void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, > > unsigned long size); > > void devm_iounmap(struct device *dev, void __iomem *addr); > > +void devm_ioremap_release(struct device *dev, void *res); > > + > > +#ifdef CONFIG_CHECK_SIGNATURE > > int check_signature(const volatile void __iomem *io_addr, > > const unsigned char *signature, int length); > > -void devm_ioremap_release(struct device *dev, void *res); > > +#endif > > We usually avoid doing this. Detecting the error at link time is > sufficient. > > Yes, that will very occasionally cost a small number of people a little > additional time. But we must balance that against permanently messing > up the header files.
OK, fair enough. Patch deleted.
-- Jean Delvare
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