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Diffstat (limited to 'arch/powerpc/platforms/pseries/xics.c')
-rw-r--r--arch/powerpc/platforms/pseries/xics.c32
1 files changed, 14 insertions, 18 deletions
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index f5f79196721..4ca641042ec 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -127,7 +127,7 @@ static inline unsigned int lpar_xirr_info_get(void)
lpar_rc = plpar_xirr(&return_value);
if (lpar_rc != H_SUCCESS)
- panic(" bad return code xirr - rc = %lx \n", lpar_rc);
+ panic(" bad return code xirr - rc = %lx\n", lpar_rc);
return (unsigned int)return_value;
}
@@ -424,7 +424,7 @@ static int xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
}
static struct irq_chip xics_pic_direct = {
- .name = " XICS ",
+ .name = "XICS",
.startup = xics_startup,
.mask = xics_mask_irq,
.unmask = xics_unmask_irq,
@@ -433,7 +433,7 @@ static struct irq_chip xics_pic_direct = {
};
static struct irq_chip xics_pic_lpar = {
- .name = " XICS ",
+ .name = "XICS",
.startup = xics_startup,
.mask = xics_mask_irq,
.unmask = xics_unmask_irq,
@@ -510,15 +510,13 @@ static void __init xics_init_host(void)
/*
* XICS only has a single IPI, so encode the messages per CPU
*/
-struct xics_ipi_struct {
- unsigned long value;
- } ____cacheline_aligned;
-
-static struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
+static DEFINE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message);
static inline void smp_xics_do_message(int cpu, int msg)
{
- set_bit(msg, &xics_ipi_message[cpu].value);
+ unsigned long *tgt = &per_cpu(xics_ipi_message, cpu);
+
+ set_bit(msg, tgt);
mb();
if (firmware_has_feature(FW_FEATURE_LPAR))
lpar_qirr_info(cpu, IPI_PRIORITY);
@@ -544,25 +542,23 @@ void smp_xics_message_pass(int target, int msg)
static irqreturn_t xics_ipi_dispatch(int cpu)
{
+ unsigned long *tgt = &per_cpu(xics_ipi_message, cpu);
+
WARN_ON(cpu_is_offline(cpu));
mb(); /* order mmio clearing qirr */
- while (xics_ipi_message[cpu].value) {
- if (test_and_clear_bit(PPC_MSG_CALL_FUNCTION,
- &xics_ipi_message[cpu].value)) {
+ while (*tgt) {
+ if (test_and_clear_bit(PPC_MSG_CALL_FUNCTION, tgt)) {
smp_message_recv(PPC_MSG_CALL_FUNCTION);
}
- if (test_and_clear_bit(PPC_MSG_RESCHEDULE,
- &xics_ipi_message[cpu].value)) {
+ if (test_and_clear_bit(PPC_MSG_RESCHEDULE, tgt)) {
smp_message_recv(PPC_MSG_RESCHEDULE);
}
- if (test_and_clear_bit(PPC_MSG_CALL_FUNC_SINGLE,
- &xics_ipi_message[cpu].value)) {
+ if (test_and_clear_bit(PPC_MSG_CALL_FUNC_SINGLE, tgt)) {
smp_message_recv(PPC_MSG_CALL_FUNC_SINGLE);
}
#if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
- if (test_and_clear_bit(PPC_MSG_DEBUGGER_BREAK,
- &xics_ipi_message[cpu].value)) {
+ if (test_and_clear_bit(PPC_MSG_DEBUGGER_BREAK, tgt)) {
smp_message_recv(PPC_MSG_DEBUGGER_BREAK);
}
#endif