Messages in this thread | | | Date | Sun, 2 Aug 2009 00:33:05 +0100 | From | Ralf Baechle <> | Subject | Re: Strange arch/mips/delay.c |
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On Sat, Aug 01, 2009 at 07:37:18PM +0200, Loïc Grenié wrote:
> I could not compile for mips without something similar to the > following patch. As far as I can say __udelay and __ndelay > are costly nops (with __ndelay not compiling at all) without > the patch. > > At that point, it might be interesting to change > the 0x00000005uLL by 0x00000045uLL and the >> 32 > by >> 36 (the precision is much better and the cost > should be the same -- obviously there is a slightly higher > risk of overlow).
Later versions of the kernel already contain a similar fix. I've not propagated MIPS fixes into upstream -stable but the fixes are available in the -stable branches of the MIPS git repository at git://git.linux-mips.org/pub/scm/linux.git, the tarballs created from that repository available for download on {ftp,www}.linux-mips.org or on git.kernel.org.
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