From: Thomas Petazzoni Date: Wed, 5 Jun 2013 07:04:54 +0000 (+0200) Subject: arm: mvebu: remove dependency of SMP init on static I/O mapping X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~71^2~33^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b21dcafea36dd6249df9cf485a48c7337a8987af;p=pandora-kernel.git arm: mvebu: remove dependency of SMP init on static I/O mapping The ->smp_init_cpus() function is called very early during boot, at a point where dynamic I/O mappings are not yet possible. However, in the Armada 370/XP implementation of this function, we have to get the number of CPUs. We used to do that by accessing a hardware register, which requires relying on a static I/O mapping set up by ->map_io(). Not only this requires hardcoding a virtual address, but it also prevents us from removing the static I/O mapping. So this commit changes the way used to get the number of CPUs: we now use the Device Tree, which is a representation of the hardware, and provides us the number of available CPUs. This is also more accurate, because it potentially allows to boot the Linux kernel on only a number of CPUs given by the Device Tree, instead of unconditionally on all CPUs. As a consequence, the coherency_get_cpu_count() function becomes no longer used, so we remove it. Signed-off-by: Thomas Petazzoni Acked-by: Arnd Bergmann Signed-off-by: Jason Cooper --- Reading git-diff-tree failed