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| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-04-28 16:05:01 +0100 |
|---|---|---|
| committer |   Arnd Bergmann <arnd@arndb.de> | 2016-05-09 16:36:03 +0200 |
| commit | 5420f9fd159761b88978c312c3b350546f8615bb (patch) | |
| tree | 3f596fe83edce5d6ba7776f7f2fe016778a688d4 /drivers/bus | |
| parent | Merge tag 'reset-for-4.7-2' of git://git.pengutronix.de/git/pza/linux into next/drivers (diff) | |
| download | wireguard-linux-5420f9fd159761b88978c312c3b350546f8615bb.tar.xz wireguard-linux-5420f9fd159761b88978c312c3b350546f8615bb.zip | |
arm-ccn: Enable building as module
arm-ccn driver uses irq_set_affinity, which is not exported and
hence cannot be built as a module, eventhough we have all the
bits ready. This patch makes use of the exported helper
irq_set_affinity_hint() instead. Also, the __free_irq expects
the affinity_hint to be NULL when we free the irq. So set the
affinity_hint to NULL at clean up.
Now that we can build it as a module, update the Kconfig to
reflect the change.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/bus/arm-ccn.c | 7 |
2 files changed, 5 insertions, 4 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index f5ea153f53e9..c5a7de9bc783 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -48,7 +48,7 @@ config ARM_CCI5xx_PMU If unsure, say Y config ARM_CCN - bool "ARM CCN driver support" + tristate "ARM CCN driver support" depends on ARM || ARM64 depends on PERF_EVENTS help diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c index 7082c7268845..acc3eb542c74 100644 --- a/drivers/bus/arm-ccn.c +++ b/drivers/bus/arm-ccn.c @@ -1189,7 +1189,7 @@ static int arm_ccn_pmu_cpu_notifier(struct notifier_block *nb, perf_pmu_migrate_context(&dt->pmu, cpu, target); cpumask_set_cpu(target, &dt->cpu); if (ccn->irq) - WARN_ON(irq_set_affinity(ccn->irq, &dt->cpu) != 0); + WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0); default: break; } @@ -1278,7 +1278,7 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn) /* Also make sure that the overflow interrupt is handled by this CPU */ if (ccn->irq) { - err = irq_set_affinity(ccn->irq, &ccn->dt.cpu); + err = irq_set_affinity_hint(ccn->irq, &ccn->dt.cpu); if (err) { dev_err(ccn->dev, "Failed to set interrupt affinity!\n"); goto error_set_affinity; @@ -1306,7 +1306,8 @@ static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn) { int i; - irq_set_affinity(ccn->irq, cpu_possible_mask); + if (ccn->irq) + irq_set_affinity_hint(ccn->irq, NULL); unregister_cpu_notifier(&ccn->dt.cpu_nb); for (i = 0; i < ccn->num_xps; i++) writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL); |