OpenCloudOS-Kernel/arch/x86
Tejun Heo d9a89a26e0 x86: add %gs accessors for x86_32
Impact: cleanup

On x86_32, %gs is handled lazily.  It's not saved and restored on
kernel entry/exit but only when necessary which usually is during task
switch but there are few other places.  Currently, it's done by
calling savesegment() and loadsegment() explicitly.  Define
get_user_gs(), set_user_gs() and task_user_gs() and use them instead.

While at it, clean up register access macros in signal.c.

This cleans up code a bit and will help future changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-10 00:41:58 +01:00
..
boot x86 setup: fix asm constraints in vesa_store_edid 2009-01-30 23:55:25 +01:00
configs eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
crypto crypto: crc32c-intel - Switch to shash 2008-12-25 11:01:37 +11:00
ia32 Merge branch 'x86/uaccess' into core/percpu 2009-02-10 00:40:48 +01:00
include/asm x86: add %gs accessors for x86_32 2009-02-10 00:41:58 +01:00
kernel x86: add %gs accessors for x86_32 2009-02-10 00:41:58 +01:00
kvm KVM: change KVM to use IOMMU API 2009-01-03 14:11:07 +01:00
lguest x86/paravirt: add register-saving thunks to reduce caller register pressure 2009-01-30 14:51:45 -08:00
lib x86: use early clobbers in usercopy*.c 2009-01-21 09:43:17 +01:00
mach-default x86/Voyager: make it build and boot 2009-01-31 18:26:07 +01:00
mach-generic x86: rename all fields of mpc_table mpc_X to X 2009-01-05 14:08:34 +01:00
mach-rdc321x removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
mach-voyager Merge commit 'v2.6.29-rc4' into core/percpu 2009-02-09 14:58:11 +01:00
math-emu x86: add %gs accessors for x86_32 2009-02-10 00:41:58 +01:00
mm Merge branch 'x86/uaccess' into core/percpu 2009-02-10 00:40:48 +01:00
oprofile Merge branch 'oprofile/ring_buffer' into oprofile/oprofile-for-tip 2009-01-08 14:27:34 +01:00
pci PCI: irq and pci_ids patch for Intel Tigerpoint DeviceIDs 2009-01-27 09:46:08 -08:00
power x86, hibernate: fix breakage on x86_32 with CONFIG_NUMA set 2008-11-12 23:28:51 +01:00
vdso x86: no stack protector for vdso 2009-02-10 00:41:56 +01:00
video
xen Merge commit 'v2.6.29-rc4' into core/percpu 2009-02-09 14:58:11 +01:00
Kconfig Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
Kconfig.cpu Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
Kconfig.debug Merge branch 'linus' into stackprotector 2008-12-31 08:31:57 +01:00
Makefile stackprotector: update make rules 2009-02-10 00:41:54 +01:00
Makefile_32.cpu x86: merge winchip-2 and winchip-2a cpu choices 2008-10-13 10:22:48 +02:00