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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>
This commit is contained in:
Tejun Heo 2009-10-29 22:34:13 +09:00
parent f16250669d
commit c6e22f9e3e
4 changed files with 111 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

131
arch/ia64/xen/irq_xen.c
View File

@ -63,19 +63,19 @@ xen_free_irq_vector(int vector)
}
static DEFINE_PER_CPU(int, timer_irq) = -1;
static DEFINE_PER_CPU(int, ipi_irq) = -1;
static DEFINE_PER_CPU(int, resched_irq) = -1;
static DEFINE_PER_CPU(int, cmc_irq) = -1;
static DEFINE_PER_CPU(int, cmcp_irq) = -1;
static DEFINE_PER_CPU(int, cpep_irq) = -1;
static DEFINE_PER_CPU(int, xen_timer_irq) = -1;
static DEFINE_PER_CPU(int, xen_ipi_irq) = -1;
static DEFINE_PER_CPU(int, xen_resched_irq) = -1;
static DEFINE_PER_CPU(int, xen_cmc_irq) = -1;
static DEFINE_PER_CPU(int, xen_cmcp_irq) = -1;
static DEFINE_PER_CPU(int, xen_cpep_irq) = -1;
#define NAME_SIZE 15
static DEFINE_PER_CPU(char[NAME_SIZE], timer_name);
static DEFINE_PER_CPU(char[NAME_SIZE], ipi_name);
static DEFINE_PER_CPU(char[NAME_SIZE], resched_name);
static DEFINE_PER_CPU(char[NAME_SIZE], cmc_name);
static DEFINE_PER_CPU(char[NAME_SIZE], cmcp_name);
static DEFINE_PER_CPU(char[NAME_SIZE], cpep_name);
static DEFINE_PER_CPU(char[NAME_SIZE], xen_timer_name);
static DEFINE_PER_CPU(char[NAME_SIZE], xen_ipi_name);
static DEFINE_PER_CPU(char[NAME_SIZE], xen_resched_name);
static DEFINE_PER_CPU(char[NAME_SIZE], xen_cmc_name);
static DEFINE_PER_CPU(char[NAME_SIZE], xen_cmcp_name);
static DEFINE_PER_CPU(char[NAME_SIZE], xen_cpep_name);
#undef NAME_SIZE
struct saved_irq {
@ -144,64 +144,64 @@ __xen_register_percpu_irq(unsigned int cpu, unsigned int vec,
if (xen_slab_ready) {
switch (vec) {
case IA64_TIMER_VECTOR:
snprintf(per_cpu(timer_name, cpu),
sizeof(per_cpu(timer_name, cpu)),
snprintf(per_cpu(xen_timer_name, cpu),
sizeof(per_cpu(xen_timer_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_virq_to_irqhandler(VIRQ_ITC, cpu,
action->handler, action->flags,
per_cpu(timer_name, cpu), action->dev_id);
per_cpu(timer_irq, cpu) = irq;
per_cpu(xen_timer_name, cpu), action->dev_id);
per_cpu(xen_timer_irq, cpu) = irq;
break;
case IA64_IPI_RESCHEDULE:
snprintf(per_cpu(resched_name, cpu),
sizeof(per_cpu(resched_name, cpu)),
snprintf(per_cpu(xen_resched_name, cpu),
sizeof(per_cpu(xen_resched_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR, cpu,
action->handler, action->flags,
per_cpu(resched_name, cpu), action->dev_id);
per_cpu(resched_irq, cpu) = irq;
per_cpu(xen_resched_name, cpu), action->dev_id);
per_cpu(xen_resched_irq, cpu) = irq;
break;
case IA64_IPI_VECTOR:
snprintf(per_cpu(ipi_name, cpu),
sizeof(per_cpu(ipi_name, cpu)),
snprintf(per_cpu(xen_ipi_name, cpu),
sizeof(per_cpu(xen_ipi_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_IPI_VECTOR, cpu,
action->handler, action->flags,
per_cpu(ipi_name, cpu), action->dev_id);
per_cpu(ipi_irq, cpu) = irq;
per_cpu(xen_ipi_name, cpu), action->dev_id);
per_cpu(xen_ipi_irq, cpu) = irq;
break;
case IA64_CMC_VECTOR:
snprintf(per_cpu(cmc_name, cpu),
sizeof(per_cpu(cmc_name, cpu)),
snprintf(per_cpu(xen_cmc_name, cpu),
sizeof(per_cpu(xen_cmc_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_virq_to_irqhandler(VIRQ_MCA_CMC, cpu,
action->handler,
action->flags,
per_cpu(cmc_name, cpu),
action->dev_id);
per_cpu(cmc_irq, cpu) = irq;
action->handler,
action->flags,
per_cpu(xen_cmc_name, cpu),
action->dev_id);
per_cpu(xen_cmc_irq, cpu) = irq;
break;
case IA64_CMCP_VECTOR:
snprintf(per_cpu(cmcp_name, cpu),
sizeof(per_cpu(cmcp_name, cpu)),
snprintf(per_cpu(xen_cmcp_name, cpu),
sizeof(per_cpu(xen_cmcp_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_CMCP_VECTOR, cpu,
action->handler,
action->flags,
per_cpu(cmcp_name, cpu),
action->dev_id);
per_cpu(cmcp_irq, cpu) = irq;
action->handler,
action->flags,
per_cpu(xen_cmcp_name, cpu),
action->dev_id);
per_cpu(xen_cmcp_irq, cpu) = irq;
break;
case IA64_CPEP_VECTOR:
snprintf(per_cpu(cpep_name, cpu),
sizeof(per_cpu(cpep_name, cpu)),
snprintf(per_cpu(xen_cpep_name, cpu),
sizeof(per_cpu(xen_cpep_name, cpu)),
"%s%d", action->name, cpu);
irq = bind_ipi_to_irqhandler(XEN_CPEP_VECTOR, cpu,
action->handler,
action->flags,
per_cpu(cpep_name, cpu),
action->dev_id);
per_cpu(cpep_irq, cpu) = irq;
action->handler,
action->flags,
per_cpu(xen_cpep_name, cpu),
action->dev_id);
per_cpu(xen_cpep_irq, cpu) = irq;
break;
case IA64_CPE_VECTOR:
case IA64_MCA_RENDEZ_VECTOR:
@ -275,30 +275,33 @@ unbind_evtchn_callback(struct notifier_block *nfb,
if (action == CPU_DEAD) {
/* Unregister evtchn. */
if (per_cpu(cpep_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(cpep_irq, cpu), NULL);
per_cpu(cpep_irq, cpu) = -1;
if (per_cpu(xen_cpep_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(xen_cpep_irq, cpu),
NULL);
per_cpu(xen_cpep_irq, cpu) = -1;
}
if (per_cpu(cmcp_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(cmcp_irq, cpu), NULL);
per_cpu(cmcp_irq, cpu) = -1;
if (per_cpu(xen_cmcp_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(xen_cmcp_irq, cpu),
NULL);
per_cpu(xen_cmcp_irq, cpu) = -1;
}
if (per_cpu(cmc_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(cmc_irq, cpu), NULL);
per_cpu(cmc_irq, cpu) = -1;
if (per_cpu(xen_cmc_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(xen_cmc_irq, cpu), NULL);
per_cpu(xen_cmc_irq, cpu) = -1;
}
if (per_cpu(ipi_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(ipi_irq, cpu), NULL);
per_cpu(ipi_irq, cpu) = -1;
if (per_cpu(xen_ipi_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(xen_ipi_irq, cpu), NULL);
per_cpu(xen_ipi_irq, cpu) = -1;
}
if (per_cpu(resched_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(resched_irq, cpu),
NULL);
per_cpu(resched_irq, cpu) = -1;
if (per_cpu(xen_resched_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu),
NULL);
per_cpu(xen_resched_irq, cpu) = -1;
}
if (per_cpu(timer_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(timer_irq, cpu), NULL);
per_cpu(timer_irq, cpu) = -1;
if (per_cpu(xen_timer_irq, cpu) >= 0) {
unbind_from_irqhandler(per_cpu(xen_timer_irq, cpu),
NULL);
per_cpu(xen_timer_irq, cpu) = -1;
}
}
return NOTIFY_OK;

22
arch/ia64/xen/time.c
View File

@ -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 @@ static void xen_init_missing_ticks_accounting(int cpu)
&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 @@ static void get_runstate_snapshot(struct vcpu_runstate_info *res)
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 @@ consider_steal_time(unsigned long new_itm)
* 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 @@ consider_steal_time(unsigned long new_itm)
} 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;
}

41
arch/x86/xen/smp.c
View File

@ -35,10 +35,10 @@
cpumask_var_t xen_cpu_initialized_map;
static DEFINE_PER_CPU(int, resched_irq);
static DEFINE_PER_CPU(int, callfunc_irq);
static DEFINE_PER_CPU(int, callfuncsingle_irq);
static DEFINE_PER_CPU(int, debug_irq) = -1;
static DEFINE_PER_CPU(int, xen_resched_irq);
static DEFINE_PER_CPU(int, xen_callfunc_irq);
static DEFINE_PER_CPU(int, xen_callfuncsingle_irq);
static DEFINE_PER_CPU(int, xen_debug_irq) = -1;
static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id);
static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id);
@ -103,7 +103,7 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
per_cpu(resched_irq, cpu) = rc;
per_cpu(xen_resched_irq, cpu) = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_VECTOR,
@ -114,7 +114,7 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
per_cpu(callfunc_irq, cpu) = rc;
per_cpu(xen_callfunc_irq, cpu) = rc;
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt,
@ -122,7 +122,7 @@ static int xen_smp_intr_init(unsigned int cpu)
debug_name, NULL);
if (rc < 0)
goto fail;
per_cpu(debug_irq, cpu) = rc;
per_cpu(xen_debug_irq, cpu) = rc;
callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,
@ -133,19 +133,20 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
per_cpu(callfuncsingle_irq, cpu) = rc;
per_cpu(xen_callfuncsingle_irq, cpu) = rc;
return 0;
fail:
if (per_cpu(resched_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
if (per_cpu(callfunc_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
if (per_cpu(debug_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL);
if (per_cpu(callfuncsingle_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(callfuncsingle_irq, cpu), NULL);
if (per_cpu(xen_resched_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu), NULL);
if (per_cpu(xen_callfunc_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
if (per_cpu(xen_debug_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
if (per_cpu(xen_callfuncsingle_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu),
NULL);
return rc;
}
@ -348,10 +349,10 @@ static void xen_cpu_die(unsigned int cpu)
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ/10);
}
unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(callfuncsingle_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);
xen_uninit_lock_cpu(cpu);
xen_teardown_timer(cpu);

24
arch/x86/xen/time.c
View File

@ -31,14 +31,14 @@
#define NS_PER_TICK (1000000000LL / HZ)
/* runstate info updated by Xen */
static DEFINE_PER_CPU(struct vcpu_runstate_info, runstate);
static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate);
/* snapshots of runstate info */
static DEFINE_PER_CPU(struct vcpu_runstate_info, runstate_snapshot);
static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate_snapshot);
/* unused ns of stolen and blocked time */
static DEFINE_PER_CPU(u64, residual_stolen);
static DEFINE_PER_CPU(u64, residual_blocked);
static DEFINE_PER_CPU(u64, xen_residual_stolen);
static DEFINE_PER_CPU(u64, xen_residual_blocked);
/* return an consistent snapshot of 64-bit time/counter value */
static u64 get64(const u64 *p)
@ -79,7 +79,7 @@ static void get_runstate_snapshot(struct vcpu_runstate_info *res)
BUG_ON(preemptible());
state = &__get_cpu_var(runstate);
state = &__get_cpu_var(xen_runstate);
/*
* The runstate info is always updated by the hypervisor on
@ -97,14 +97,14 @@ static void get_runstate_snapshot(struct vcpu_runstate_info *res)
/* return true when a vcpu could run but has no real cpu to run on */
bool xen_vcpu_stolen(int vcpu)
{
return per_cpu(runstate, vcpu).state == RUNSTATE_runnable;
return per_cpu(xen_runstate, vcpu).state == RUNSTATE_runnable;
}
static void setup_runstate_info(int cpu)
{
struct vcpu_register_runstate_memory_area area;
area.addr.v = &per_cpu(runstate, cpu);
area.addr.v = &per_cpu(xen_runstate, cpu);
if (HYPERVISOR_vcpu_op(VCPUOP_register_runstate_memory_area,
cpu, &area))
@ -122,7 +122,7 @@ static void do_stolen_accounting(void)
WARN_ON(state.state != RUNSTATE_running);
snap = &__get_cpu_var(runstate_snapshot);
snap = &__get_cpu_var(xen_runstate_snapshot);
/* work out how much time the VCPU has not been runn*ing* */
blocked = state.time[RUNSTATE_blocked] - snap->time[RUNSTATE_blocked];
@ -133,24 +133,24 @@ static void do_stolen_accounting(void)
/* Add the appropriate number of ticks of stolen time,
including any left-overs from last time. */
stolen = runnable + offline + __get_cpu_var(residual_stolen);
stolen = runnable + offline + __get_cpu_var(xen_residual_stolen);
if (stolen < 0)
stolen = 0;
ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
__get_cpu_var(residual_stolen) = stolen;
__get_cpu_var(xen_residual_stolen) = stolen;
account_steal_ticks(ticks);
/* Add the appropriate number of ticks of blocked time,
including any left-overs from last time. */
blocked += __get_cpu_var(residual_blocked);
blocked += __get_cpu_var(xen_residual_blocked);
if (blocked < 0)
blocked = 0;
ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked);
__get_cpu_var(residual_blocked) = blocked;
__get_cpu_var(xen_residual_blocked) = blocked;
account_idle_ticks(ticks);
}