| Message ID | 20170115211215.17216-5-mcgrof@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sun, Jan 15, 2017 at 01:12:13PM -0800, Luis R. Rodriguez wrote:
> This will be used later by the linker-table userspace sandbox.
That does not explan what this is, why it is needed, or anything at all
:(
On Sun, Jan 15, 2017 at 01:12:13PM -0800, Luis R. Rodriguez wrote: > This will be used later by the linker-table userspace sandbox. > > Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> > --- > tools/include/linux/export.h | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/tools/include/linux/export.h b/tools/include/linux/export.h > index d07e586b9ba0..cb7d6b490e08 100644 > --- a/tools/include/linux/export.h > +++ b/tools/include/linux/export.h > @@ -1,6 +1,28 @@ > #ifndef _TOOLS_LINUX_EXPORT_H_ > #define _TOOLS_LINUX_EXPORT_H_ > > +/* > + * Export symbols from the kernel to modules. Forked from module.h > + * to reduce the amount of pointless cruft we feed to gcc when only > + * exporting a simple symbol or two. You copied it, yet did not remove it from the original? > + * > + * Try not to add #includes here. It slows compilation and makes kernel > + * hackers place grumpy comments in header files. Define "slows" please. I doubt it is measurable, and so, why even mention it here? thanks, greg k-h
diff --git a/tools/include/linux/export.h b/tools/include/linux/export.h index d07e586b9ba0..cb7d6b490e08 100644 --- a/tools/include/linux/export.h +++ b/tools/include/linux/export.h @@ -1,6 +1,28 @@ #ifndef _TOOLS_LINUX_EXPORT_H_ #define _TOOLS_LINUX_EXPORT_H_ +/* + * Export symbols from the kernel to modules. Forked from module.h + * to reduce the amount of pointless cruft we feed to gcc when only + * exporting a simple symbol or two. + * + * Try not to add #includes here. It slows compilation and makes kernel + * hackers place grumpy comments in header files. + */ + +/* Some toolchains use a `_' prefix for all user symbols. */ +#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX +#define __VMLINUX_SYMBOL(x) _##x +#define __VMLINUX_SYMBOL_STR(x) "_" #x +#else +#define __VMLINUX_SYMBOL(x) x +#define __VMLINUX_SYMBOL_STR(x) #x +#endif + +/* Indirect, so macros are expanded before pasting. */ +#define VMLINUX_SYMBOL(x) __VMLINUX_SYMBOL(x) +#define VMLINUX_SYMBOL_STR(x) __VMLINUX_SYMBOL_STR(x) + #define EXPORT_SYMBOL(sym) #define EXPORT_SYMBOL_GPL(sym) #define EXPORT_SYMBOL_GPL_FUTURE(sym)
This will be used later by the linker-table userspace sandbox. Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> --- tools/include/linux/export.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)