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HomeDefectsCGP7-223

Fixed

CGP7-223 : edac service start with warning: "/dev/mem: Operation not permitted"

Created: Jan 30, 2015 Updated: Mar 31, 2016

Resolved Date: Feb 4, 2015

Found In Version: 7.0

Fix Version: 7.0.0.4

Severity: Standard

Applicable for: Wind River Linux 7

Component/s: BSP

Description

root@fsl_t2080rdb:~# /etc/init.d/edac start
Starting edac: success
Loading edac DIMM labels: /dev/mem: Operation not permitted
success

It's because CONFIG_STRICT_DEVMEM is enabled for the BSP:
$ grep DEVMEM build/linux-windriver/linux-fsl_t2xxx-cgl-build/.config
CONFIG_STRICT_DEVMEM=y

I think STRICT_DEVMEM should be disable when with edac feature to allow userspace (root) access to /dev/mem.

Steps to Reproduce

1) configure with:
--enable-rootfs=glibc-cgl --enable-kernel=cgl --enable-board=fsl-t2xxx --with-template=feature/edac

2) build
make fs

3) boot up the target and start edac:
# /etc/init.d/edac start