Sam bobroff 1739ea9e13 powerpc: Fix regression of per-CPU DSCR setting ... Since commit "efcac65 powerpc: Per process DSCR + some fixes (try#4)" it is no longer possible to set the DSCR on a per-CPU basis. The old behaviour was to minipulate the DSCR SPR directly but this is no longer sufficient: the value is quickly overwritten by context switching. This patch stores the per-CPU DSCR value in a kernel variable rather than directly in the SPR and it is used whenever a process has not set the DSCR itself. The sysfs interface (/sys/devices/system/cpu/cpuN/dscr) is unchanged. Writes to the old global default (/sys/devices/system/cpu/dscr_default) now set all of the per-CPU values and reads return the last written value. The new per-CPU default is added to the paca_struct and is used everywhere outside of sysfs.c instead of the old global default. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>		2014-05-28 13:35:40 +10:00
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asm	powerpc: Fix regression of per-CPU DSCR setting	2014-05-28 13:35:40 +10:00
uapi/asm	powerpc: Remove non-uapi linkage.h export	2014-05-20 10:54:05 +10:00