7c3576d261
Currently x86 (similar to x84-64) has a special per-cpu structure called "i386_pda" which can be easily and efficiently referenced via the %fs register. An ELF section is more flexible than a structure, allowing any piece of code to use this area. Indeed, such a section already exists: the per-cpu area. So this patch: (1) Removes the PDA and uses per-cpu variables for each current member. (2) Replaces the __KERNEL_PDA segment with __KERNEL_PERCPU. (3) Creates a per-cpu mirror of __per_cpu_offset called this_cpu_off, which can be used to calculate addresses for this CPU's variables. (4) Simplifies startup, because %fs doesn't need to be loaded with a special segment at early boot; it can be deferred until the first percpu area is allocated (or never for UP). The result is less code and one less x86-specific concept. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> |
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.. | ||
acpi | ||
cpu | ||
.gitignore | ||
alternative.c | ||
apic.c | ||
apm.c | ||
asm-offsets.c | ||
bootflag.c | ||
cpuid.c | ||
crash.c | ||
crash_dump.c | ||
doublefault.c | ||
e820.c | ||
early_printk.c | ||
efi.c | ||
efi_stub.S | ||
entry.S | ||
head.S | ||
hpet.c | ||
i386_ksyms.c | ||
i387.c | ||
i8237.c | ||
i8253.c | ||
i8259.c | ||
init_task.c | ||
io_apic.c | ||
ioport.c | ||
irq.c | ||
kprobes.c | ||
ldt.c | ||
machine_kexec.c | ||
Makefile | ||
mca.c | ||
microcode.c | ||
module.c | ||
mpparse.c | ||
msr.c | ||
nmi.c | ||
numaq.c | ||
paravirt.c | ||
pci-dma.c | ||
pcspeaker.c | ||
process.c | ||
ptrace.c | ||
quirks.c | ||
reboot.c | ||
reboot_fixups.c | ||
relocate_kernel.S | ||
scx200.c | ||
setup.c | ||
sigframe.h | ||
signal.c | ||
smp.c | ||
smpboot.c | ||
srat.c | ||
summit.c | ||
sys_i386.c | ||
syscall_table.S | ||
sysenter.c | ||
time.c | ||
topology.c | ||
trampoline.S | ||
traps.c | ||
tsc.c | ||
tsc_sync.c | ||
vm86.c | ||
vmi.c | ||
vmitime.c | ||
vmlinux.lds.S | ||
vsyscall-int80.S | ||
vsyscall-note.S | ||
vsyscall-sigreturn.S | ||
vsyscall-sysenter.S | ||
vsyscall.lds.S | ||
vsyscall.S |