[Xen-changelog] Ensure cur_pgd per-cpu variables are initialised early.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID a0b4156cc0ce4e6495cfa316c5383ee2be81c22f
# Parent  f80278e5e4407141ca73caf6627d1c5d7aa65312
Ensure cur_pgd per-cpu variables are initialised early.
Secondary VCPUs can take page faults immediately after
booting, because of writable pagetable logic.

Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r f80278e5e440 -r a0b4156cc0ce 
linux-2.6-xen-sparse/arch/xen/i386/mm/init.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/init.c      Tue Aug 23 17:28:53 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/init.c      Tue Aug 23 17:29:46 2005
@@ -348,9 +348,12 @@
 {
        unsigned long vaddr;
        pgd_t *pgd_base = (pgd_t *)xen_start_info.pt_base;
+       int i;
 
        swapper_pg_dir = pgd_base;
        init_mm.pgd    = pgd_base;
+       for (i = 0; i < NR_CPUS; i++)
+               per_cpu(cur_pgd, i) = pgd_base;
 
        /* Enable PSE if available */
        if (cpu_has_pse) {
diff -r f80278e5e440 -r a0b4156cc0ce 
linux-2.6-xen-sparse/arch/xen/x86_64/mm/init.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/mm/init.c    Tue Aug 23 17:28:53 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/mm/init.c    Tue Aug 23 17:29:46 2005
@@ -559,6 +559,11 @@
 
 void __init xen_init_pt(void)
 {
+       int i;
+
+       for (i = 0; i < NR_CPUS; i++)
+               per_cpu(cur_pgd, i) = init_mm.pgd;
+
        memcpy((void *)init_level4_pgt, 
               (void *)xen_start_info.pt_base, PAGE_SIZE);
 

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