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Boris Ostrovsky 4461bbc05b x86/xen: Fix 32-bit PV guests's usage of kernel_stack 
Commit 198d208df4 ("x86: Keep
thread_info on thread stack in x86_32") made 32-bit kernels use
kernel_stack to point to thread_info. That change missed a couple of
updates needed by Xen's 32-bit PV guests:

1. kernel_stack needs to be initialized for secondary CPUs

2. GET_THREAD_INFO() now uses %fs register which may not be the
   kernel's version when executing xen_iret().

With respect to the second issue, we don't need GET_THREAD_INFO()
anymore: we used it as an intermediate step to get to per_cpu xen_vcpu
and avoid referencing %fs. Now that we are going to use %fs anyway we
may as well go directly to xen_vcpu.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2014-04-15 15:00:14 +01:00
..
alpha arch: Remove stub cputime.h headers 2014-03-13 16:09:30 +01:00
arc Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-03-31 10:59:39 -07:00
arm Merge commit '683b6c6f82a60fabf47012581c2cfbf1b037ab95' into stable/for-linus-3.15 2014-04-07 13:52:12 +01:00
arm64 Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-03-31 15:27:37 -07:00
avr32 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32 2014-04-01 09:49:16 -07:00
blackfin locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
c6x Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-03-31 10:59:39 -07:00
cris Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 10:16:10 -07:00
frv arch: Remove stub cputime.h headers 2014-03-13 16:09:30 +01:00
hexagon locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
ia64 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
m32r arch: Remove stub cputime.h headers 2014-03-13 16:09:30 +01:00
m68k Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
metag locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
microblaze Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 10:16:10 -07:00
mips Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
mn10300 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
openrisc locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
parisc Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
powerpc Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
s390 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
score arch: Remove stub cputime.h headers 2014-03-13 16:09:30 +01:00
sh Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
sparc Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
tile locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
um locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
unicore32 locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
x86 x86/xen: Fix 32-bit PV guests's usage of kernel_stack 2014-04-15 15:00:14 +01:00
xtensa Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 11:22:57 -07:00
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