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
..
irq	Don't call "note_interrupt()" with irq descriptor lock held	2006-11-22 09:32:06 -08:00
power	[PATCH] swsusp: debugging	2006-11-03 12:27:58 -08:00
time	[PATCH] time_adjust cleared before use	2006-10-28 11:30:55 -07:00
.gitignore
acct.c
audit.c	[PATCH] kauditd_thread warning fix	2006-10-06 08:53:39 -07:00
audit.h
auditfilter.c	[PATCH] arch filter lists with < or > should not be accepted	2006-10-04 08:31:16 -04:00
auditsc.c	[PATCH] severing skbuff.h -> highmem.h	2006-12-04 02:00:29 -05:00
capability.c
compat.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
configs.c
cpu.c	[PATCH] Fix the spurious unlock_cpu_hotplug false warnings	2006-11-06 01:46:22 -08:00
cpuset.c	[PATCH] cpuset ANSI prototype	2006-10-10 15:37:23 -07:00
delayacct.c	[PATCH] lockdep: fix delayacct locking bug	2006-11-06 01:46:23 -08:00
dma.c	[PATCH] kernel-doc for kernel/dma.c	2006-10-03 08:03:41 -07:00
exec_domain.c
exit.c	[PATCH] taskstats_tgid_free: fix usage	2006-10-28 11:30:54 -07:00
extable.c
fork.c	[PATCH] i386: Use %gs as the PDA base-segment in the kernel	2006-12-07 02:14:02 +01:00
futex_compat.c	[PATCH] __user annotations: futex	2006-10-10 15:37:22 -07:00
futex.c	[PATCH] schedule removal of FUTEX_FD	2006-11-03 12:27:58 -08:00
hrtimer.c
itimer.c
kallsyms.c	[PATCH] Create kallsyms_lookup_size_offset()	2006-10-03 08:03:41 -07:00
Kconfig.hz
Kconfig.preempt
kexec.c
kfifo.c
kmod.c	[PATCH] fix create_write_pipe() error check	2006-11-28 17:26:50 -08:00
kprobes.c	[PATCH] kretprobe spinlock deadlock patch	2006-10-02 07:57:16 -07:00
ksysfs.c
kthread.c
latency.c	[PATCH] severing module.h->sched.h	2006-12-04 02:00:22 -05:00
lockdep_internals.h
lockdep_proc.c
lockdep.c	[PATCH] lockdep: fix static keys in module-allocated percpu areas	2006-11-17 11:10:37 -08:00
Makefile	[PATCH] srcu-3: RCU variant permitting read-side blocking	2006-10-04 07:55:30 -07:00
module.c	[PATCH] severing module.h->sched.h	2006-12-04 02:00:22 -05:00
mutex-debug.c	Lockdep: add lockdep_set_class_and_subclass() and lockdep_set_subclass()	2006-10-11 01:45:14 -04:00
mutex-debug.h
mutex.c
mutex.h
nsproxy.c	[PATCH] kernel/nsproxy.c: use kmemdup()	2006-10-20 10:26:44 -07:00
panic.c
params.c
pid.c	[PATCH] introduce get_task_pid() to fix unsafe get_pid()	2006-10-02 07:57:25 -07:00
posix-cpu-timers.c	[PATCH] posix-cpu-timers: prevent signal delivery starvation	2006-10-17 08:18:43 -07:00
posix-timers.c	fix file specification in comments	2006-10-03 23:01:26 +02:00
printk.c	[PATCH] Add printk_timed_ratelimit()	2006-11-03 12:27:58 -08:00
profile.c	[PATCH] bitmap: parse input from kernel and user buffers	2006-10-11 11:14:22 -07:00
ptrace.c
rcupdate.c	[PATCH] rcu: simplify/improve batch tuning	2006-10-04 07:55:31 -07:00
rcutorture.c	[PATCH] rcu: add sched torture type to rcutorture	2006-10-04 07:55:31 -07:00
relay.c	[PATCH] make kernel/relay.c __user-clean	2006-10-10 15:37:22 -07:00
resource.c	[PATCH] kernel-doc for kernel/resource.c	2006-10-03 08:03:41 -07:00
rtmutex_common.h
rtmutex-debug.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
rtmutex-debug.h
rtmutex-tester.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
rtmutex.c
rtmutex.h
rwsem.c
sched.c	[PATCH] readjust comments of task_timeslice for kernel doc	2006-10-20 10:26:37 -07:00
seccomp.c
signal.c	Make sure "user->sigpending" count is in sync	2006-11-04 13:03:00 -08:00
softirq.c
softlockup.c
spinlock.c	[PATCH] lockdep: spin_lock_irqsave_nested()	2006-11-25 13:28:34 -08:00
srcu.c	[PATCH] SRCU: report out-of-memory errors	2006-10-04 07:55:30 -07:00
stacktrace.c
stop_machine.c
sys_ni.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
sys.c	[PATCH] SRCU: report out-of-memory errors	2006-10-04 07:55:30 -07:00
sysctl.c	[PATCH] sysctl: allow a zero ctl_name in the middle of a sysctl table	2006-11-06 01:46:23 -08:00
taskstats.c	[GENL]: Add genlmsg_put_reply() to simplify building reply headers	2006-12-02 21:22:42 -08:00
time.c
timer.c
tsacct.c	[PATCH] xacct_add_tsk: fix pure theoretical ->mm use-after-free	2006-10-30 12:08:41 -08:00
uid16.c
unwind.c	[PATCH] x86-64: work around gcc4 issue with -Os in Dwarf2 stack unwind	2006-11-28 20:12:59 +01:00
user.c	Fix unlikely (but possible) race condition on task->user access	2006-11-04 10:06:02 -08:00
utsname.c	[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag	2006-10-02 07:57:22 -07:00
wait.c
workqueue.c	[PATCH] workqueue: update kerneldoc	2006-10-28 11:30:55 -07:00