remarkable-linux/arch/powerpc
Anton Blanchard 00ca0de02f powerpc: Keep thread.dscr and thread.dscr_inherit in sync
When we update the DSCR either via emulation of mtspr(DSCR) or via
a change to dscr_default in sysfs we don't update thread.dscr.
We will eventually update it at context switch time but there is
a period where thread.dscr is incorrect.

If we fork at this point we will copy the old value of thread.dscr
into the child. To avoid this, always keep thread.dscr in sync with
reality.

This issue was found with the following testcase:

http://ozlabs.org/~anton/junkcode/dscr_inherit_test.c

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org> # 3.0+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05 16:05:21 +10:00
..
boot powerpc/p4080ds: dts - add usb controller version info and port0 2012-08-10 07:47:02 -05:00
configs Revert "powerpc: Update g5_defconfig" 2012-08-24 20:55:55 +10:00
include/asm powerpc/powernv: Always go into nap mode when CPU is offline 2012-09-05 16:05:20 +10:00
kernel powerpc: Keep thread.dscr and thread.dscr_inherit in sync 2012-09-05 16:05:21 +10:00
kvm ppc: e500_tlb memset clears nothing 2012-08-16 14:14:53 +02:00
lib powerpc: Fix VMX in interrupt check in POWER7 copy loops 2012-08-24 20:26:09 +10:00
math-emu
mm powerpc/vphn: Fix arch_update_cpu_topology() return value 2012-09-05 16:05:19 +10:00
net powerpc: Start using ___PPC_RA/B/S/T where necessary 2012-07-10 19:18:25 +10:00
oprofile
perf powerpc/perf: Use pmc_overflow() to detect rolled back events 2012-08-24 20:26:10 +10:00
platforms powerpc/powernv: Always go into nap mode when CPU is offline 2012-09-05 16:05:20 +10:00
sysdev powerpc/mpic_msgr: Add missing includes 2012-08-24 20:26:04 +10:00
xmon powerpc: Fixup whitespace in xmon 2012-08-24 20:26:03 +10:00
Kconfig ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION 2012-07-30 17:25:21 -07:00
Kconfig.debug powerpc: IOMMU fault injection 2012-07-10 19:18:59 +10:00
Makefile crypto: nx - move nx build to driver/crypto Makefile 2012-06-27 14:42:00 +08:00
relocs_check.pl