Messages in this thread | | | From | Guenter Roeck <> | Subject | [RFC PATCH 0/8] cris: Patches needed on top of v3.17-rc5 | Date | Sun, 21 Sep 2014 09:27:10 -0700 |
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The following series of patches is needed to boot a crisv32 image with qemu into a serial console.
The resulting image was built with a toolchain built with gcc 4.7.4 (with a minor fix backported from mainline gcc) and uclibc 0.9.33 using a patched version of buildroot. Root file system is initramfs built from latest busybox sources.
The qemu command used to start the image is as follows.
qemu-system-cris -serial stdio -kernel vmlinux -monitor none \ -nographic -append "console=ttyS0,115200,N,8 rdinit=/sbin/init"
This still causes the following (non-fatal) traceback, but at least it works.
WARNING: CPU: 0 PID: 188 at kernel/softirq.c:146 0xc000ef4e() Modules linked in: CPU: 0 PID: 188 Comm: init Not tainted 3.17.0-rc5-00008-g5f5d649 #93
Analysis shows that interupts are disabled when _local_bh_enable() is called.
The patches in this series are not intended for immediate acceptance into the upstream kernel and should instead be seen as a report on the state of the architecture in general. Having said this, the following patches should nevertheless be in acceptable state for upstream integration. cris: Add support for early console cris: Add dummy free_initrd_mem cris: time.c: Add missing include file to fix compile
Patch 6/8 ("tty: crisv32: Coding style cleanup, delete dead code") isn't really worth much by itself and can be omitted when testing the series.
Patch 7/8 of the series ("resource: Add NULL check in next_resource") was submitted separately as non-RFC patch.
Patch 8/8 ('Revert "percpu: free percpu allocation info for uniprocessor system"') is presumably only needed for cris. I have no idea why the call to pcpu_free_alloc_info() fails; maybe memory is not initialized correctly by the cris architecture code.
Patch 7/8 and 8/8 are only needed when applying the patch series to the latest upstream kernel (v3.17-rcX). For v3.16 kernels, Patches 1-6 (or 1-5, strictly speaking) are sufficient.
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