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Open Source and information security mailing list archives
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Date: Fri, 7 Dec 2007 13:03:41 +0100 From: Arnd Bergmann <arnd@...db.de> To: linuxppc-dev@...abs.org Cc: Paul Mackerras <paulus@...ba.org>, linux-kernel@...r.kernel.org Subject: Re: [RFC][POWERPC] Provide a way to protect 4k subpages when using 64k pages On Friday 07 December 2007, Paul Mackerras wrote: > I have re-purposed the ioperm system call for this. The old ioperm > system call never did anything (except return an ENOSYS error) and in > fact never could have actually been useful for anything on the PowerPC > architecture, so nothing ever used it. Couldn't there be a program that relies on ioperm to return -ENOSYS on powerpc in order to fall back on some other method of I/O access? The risk of actually breaking something is certainly low, but I think you can never be sure here, so why not use a new syscall number? Arnd <>< -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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