On Mon, Jun 15, 2009 at 12:57 AM, Benjamin Herrenschmidt<b...@kernel.crashing.org> wrote: > On Wed, 2009-05-27 at 12:55 -0600, Grant Likely wrote: >> From: Grant Likely <grant.lik...@secretlab.ca> >> >> ioremap_early() is useful for things like mapping SoC internally registers >> and early debug output because it allows mappings to devices to be setup >> early in the boot process where they are needed. It also give a >> performance boost since BAT mapped registers don't get flushed out of >> the TLB. >> >> Without ioremap_early(), early mappings are set up in an ad-hoc manner >> and they get lost when the MMU is set up. Drivers then have to perform >> hacky fixups to transition over to new mappings. >> >> Signed-off-by: Grant Likely <grant.lik...@secretlab.ca> >> --- > > My 40x config gives me: > > /home/benh/linux-powerpc-test/drivers/video/xilinxfb.c:409: warning: > ‘dcr_host.base’ may be used uninitialized in this function > > (warning, I think, was already there, so the patch is going into -next > but we may want another one, provided we find a way to shut the idiot up > without horrible hacks since that's just gcc being stupid I believe).
I'll have the final fix out to you today. g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
