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Avi Kivity 7c68af6e32 core, x86: Add user return notifiers 
Add a general per-cpu notifier that is called whenever the kernel is
about to return to userspace.  The notifier uses a thread_info flag
and existing checks, so there is no impact on user return or context
switch fast paths.

This will be used initially to speed up KVM task switching by lazily
updating MSRs.

Signed-off-by: Avi Kivity <avi@redhat.com>
LKML-Reference: <1253342422-13811-1-git-send-email-avi@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-10-01 12:12:18 -07:00
..
alpha alpha: Fix duplicate <asm/thread_info.h> include 2009-09-27 14:46:05 -07:00
arm Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 2009-09-30 07:58:25 -07:00
avr32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next 2009-09-23 15:37:02 -07:00
blackfin blackfin: Cleanup linker script using new linker script macros. 2009-09-24 17:16:22 -07:00
cris Merge branch 'for-linus' of git://repo.or.cz/cris-mirror 2009-09-24 17:08:56 -07:00
frv FRV: Flash mappings for the MB93090-MB00 motherboard 2009-09-24 17:18:38 -07:00
h8300 h8300: Cleanup linker script using new linker script macros. 2009-09-24 17:16:22 -07:00
ia64 const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
m32r Merge branch 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_dev 2009-09-24 17:25:09 -07:00
m68k headers: utsname.h redux 2009-09-23 18:13:10 -07:00
m68knommu headers: utsname.h redux 2009-09-23 18:13:10 -07:00
microblaze Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze 2009-09-24 09:01:44 -07:00
mips MIPS: Avoid spurious make includecheck message 2009-09-30 21:47:02 +02:00
mn10300 mn10300: Clean up linker script using higher-level macros. 2009-09-24 17:16:22 -07:00
parisc parisc: Remove useless altinstructions code copied from x86. 2009-09-24 17:16:21 -07:00
powerpc const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
s390 sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
score Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next 2009-09-23 15:37:02 -07:00
sh sh: Add support DMA Engine to SH7780 2009-09-25 12:19:33 +09:00
sparc sparc64: implement page mapping percpu first chunk allocator 2009-09-29 09:17:57 +09:00
um um: Clean up linker script using standard macros. 2009-09-24 17:16:22 -07:00
x86 core, x86: Add user return notifiers 2009-10-01 12:12:18 -07:00
xtensa xtensa: Cleanup linker script using new linker script macros. 2009-09-24 17:16:21 -07:00
.gitignore
Kconfig core, x86: Add user return notifiers 2009-10-01 12:12:18 -07:00