percpu: make percpu symbols in xen unique
This patch updates percpu related symbols in xen such that percpu
symbols are unique and don't clash with local symbols. This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.
* arch/x86/xen/smp.c, arch/x86/xen/time.c, arch/ia64/xen/irq_xen.c:
add xen_ prefix to percpu variables
* arch/ia64/xen/time.c: add xen_ prefix to percpu variables, drop
processed_ prefix and make them static
Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
diff --git a/arch/ia64/xen/time.c b/arch/ia64/xen/time.c
index dbeadb9..c1c5445 100644
--- a/arch/ia64/xen/time.c
+++ b/arch/ia64/xen/time.c
@@ -34,15 +34,15 @@
#include "../kernel/fsyscall_gtod_data.h"
-DEFINE_PER_CPU(struct vcpu_runstate_info, runstate);
-DEFINE_PER_CPU(unsigned long, processed_stolen_time);
-DEFINE_PER_CPU(unsigned long, processed_blocked_time);
+static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate);
+static DEFINE_PER_CPU(unsigned long, xen_stolen_time);
+static DEFINE_PER_CPU(unsigned long, xen_blocked_time);
/* taken from i386/kernel/time-xen.c */
static void xen_init_missing_ticks_accounting(int cpu)
{
struct vcpu_register_runstate_memory_area area;
- struct vcpu_runstate_info *runstate = &per_cpu(runstate, cpu);
+ struct vcpu_runstate_info *runstate = &per_cpu(xen_runstate, cpu);
int rc;
memset(runstate, 0, sizeof(*runstate));
@@ -52,8 +52,8 @@
&area);
WARN_ON(rc && rc != -ENOSYS);
- per_cpu(processed_blocked_time, cpu) = runstate->time[RUNSTATE_blocked];
- per_cpu(processed_stolen_time, cpu) = runstate->time[RUNSTATE_runnable]
+ per_cpu(xen_blocked_time, cpu) = runstate->time[RUNSTATE_blocked];
+ per_cpu(xen_stolen_time, cpu) = runstate->time[RUNSTATE_runnable]
+ runstate->time[RUNSTATE_offline];
}
@@ -68,7 +68,7 @@
BUG_ON(preemptible());
- state = &__get_cpu_var(runstate);
+ state = &__get_cpu_var(xen_runstate);
/*
* The runstate info is always updated by the hypervisor on
@@ -103,12 +103,12 @@
* This function just checks and reject this effect.
*/
if (!time_after_eq(runstate.time[RUNSTATE_blocked],
- per_cpu(processed_blocked_time, cpu)))
+ per_cpu(xen_blocked_time, cpu)))
blocked = 0;
if (!time_after_eq(runstate.time[RUNSTATE_runnable] +
runstate.time[RUNSTATE_offline],
- per_cpu(processed_stolen_time, cpu)))
+ per_cpu(xen_stolen_time, cpu)))
stolen = 0;
if (!time_after(delta_itm + new_itm, ia64_get_itc()))
@@ -147,8 +147,8 @@
} else {
local_cpu_data->itm_next = delta_itm + new_itm;
}
- per_cpu(processed_stolen_time, cpu) += NS_PER_TICK * stolen;
- per_cpu(processed_blocked_time, cpu) += NS_PER_TICK * blocked;
+ per_cpu(xen_stolen_time, cpu) += NS_PER_TICK * stolen;
+ per_cpu(xen_blocked_time, cpu) += NS_PER_TICK * blocked;
}
return delta_itm;
}