Jeremy Fitzhardinge f95d47caae [PATCH] i386: Use %gs as the PDA base-segment in the kernel ... This patch is the meat of the PDA change. This patch makes several related changes: 1: Most significantly, %gs is now used in the kernel. This means that on entry, the old value of %gs is saved away, and it is reloaded with __KERNEL_PDA. 2: entry.S constructs the stack in the shape of struct pt_regs, and this is passed around the kernel so that the process's saved register state can be accessed. Unfortunately struct pt_regs doesn't currently have space for %gs (or %fs). This patch extends pt_regs to add space for gs (no space is allocated for %fs, since it won't be used, and it would just complicate the code in entry.S to work around the space). 3: Because %gs is now saved on the stack like %ds, %es and the integer registers, there are a number of places where it no longer needs to be handled specially; namely context switch, and saving/restoring the register state in a signal context. 4: And since kernel threads run in kernel space and call normal kernel code, they need to be created with their %gs == __KERNEL_PDA. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Chuck Ebbert <76306.1226@compuserve.com> Cc: Zachary Amsden <zach@vmware.com> Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>		2006-12-07 02:14:02 +01:00
..
boot	[PATCH] Some config.h removals	2006-10-01 00:39:34 -07:00
crypto	[CRYPTO] api: Get rid of flags argument to setkey	2006-09-21 11:41:02 +10:00
kernel	[PATCH] i386: Use %gs as the PDA base-segment in the kernel	2006-12-07 02:14:02 +01:00
lib	[PATCH] separate bdi congestion functions from queue congestion functions	2006-10-20 10:26:35 -07:00
mach-default	[PATCH] irq-flags: i386: Use the new IRQF_ constants	2006-07-02 13:58:47 -07:00
mach-es7000	[PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386)	2006-03-23 07:38:04 -08:00
mach-generic	[PATCH] i386: Replace i386 open-coded cmdline parsing with	2006-09-26 10:52:32 +02:00
mach-visws	[PATCH] visws build fix	2006-10-28 11:30:52 -07:00
mach-voyager	[PATCH] i386: Initialize the per-CPU data area	2006-12-07 02:14:02 +01:00
math-emu	[PATCH] i386: fix must_checks	2006-12-07 02:14:00 +01:00
mm	[PATCH] mm: use symbolic names instead of indices for zone initialisation	2006-10-11 11:14:14 -07:00
oprofile	[PATCH] oprofile: ppro: need to enable/disable all the counters	2006-09-29 09:18:11 -07:00
pci	PCI: make arch/i386/pci/common.c:pci_bf_sort static	2006-12-01 14:37:00 -08:00
power	[PATCH] Change the name of pagedir_nosave	2006-09-26 08:49:01 -07:00
defconfig	[PATCH] i386: Update defconfig	2006-12-07 02:14:00 +01:00
Kconfig	Attack of "the the"s in arch	2006-10-03 22:21:02 +02:00
Kconfig.cpu	[PATCH] uml: fix processor selection to exclude unsupported processors and features	2006-10-11 11:14:20 -07:00
Kconfig.debug	[PATCH] lockdep: irqtrace subsystem, i386 support	2006-07-03 15:27:03 -07:00
Makefile	[PATCH] x86: Use -maccumulate-outgoing-args	2006-10-21 18:37:01 +02:00
Makefile.cpu	[PATCH] x86-64: Use -mtune=generic for generic kernels	2006-03-25 09:10:52 -08:00