Re: [PATCH] RTC: Add mmap method to rtc character driver

[H. Peter Anvin]

Neil Horman wrote:
> In general I agree, but that only works if you operate on a platform that
> supports virtual syscalls, and has vdso configured.  I'm not overly familiar
> with vdso, but I didn't think vdso could be supported on all platforms/arches.
> This seems like it might be a nice addition in those cases.

Not really.  This introduces a potentially very difficult support 
user-visible interface.  Consider a tickless kernel -- you might end up 
taking tick interrupts ONLY to update this page, since you don't have 
any way of knowing when userspace wants to look at it.

	-hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/