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From:   Atish Patra <atish.patra@wdc.com>
To:     palmer@sifive.com, linux-riscv@lists.infradead.org,
        hch@infradead.org
Cc:     anup@brainfault.org, atish.patra@wdc.com, mark.rutland@arm.com,
        tglx@linutronix.de, linux-kernel@vger.kernel.org,
        Damien.LeMoal@wdc.com, marc.zyngier@arm.com, robh@kernel.org
Subject: [RFC 3/3] RISC-V: Remove per cpu clocksource
Date:   Fri, 14 Sep 2018 14:54:56 -0700
Message-Id: <1536962096-233842-4-git-send-email-atish.patra@wdc.com>
In-Reply-To: <1536962096-233842-1-git-send-email-atish.patra@wdc.com>
References: <1536962096-233842-1-git-send-email-atish.patra@wdc.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

There is only one clocksource in RISC-V. The boot cpu initializes
that clocksource. No need to keep a percpu data structure.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 drivers/clocksource/riscv_timer.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/riscv_timer.c b/drivers/clocksource/riscv_timer.c
index 335bdb91..537c5c70 100644
--- a/drivers/clocksource/riscv_timer.c
+++ b/drivers/clocksource/riscv_timer.c
@@ -49,7 +49,7 @@ static unsigned long long riscv_clocksource_rdtime(struct clocksource *cs)
 	return get_cycles64();
 }
 
-static DEFINE_PER_CPU(struct clocksource, riscv_clocksource) = {
+static struct clocksource riscv_clocksource = {
 	.name		= "riscv_clocksource",
 	.rating		= 300,
 	.mask		= CLOCKSOURCE_MASK(BITS_PER_LONG),
@@ -101,7 +101,6 @@ static long __init riscv_timebase_frequency(struct device_node *node)
 static int __init riscv_timer_init_dt(struct device_node *n)
 {
 	int cpuid, hartid, error;
-	struct clocksource *cs;
 
 	hartid = riscv_of_processor_hartid(n);
 	cpuid = riscv_hartid_to_cpuid(hartid);
@@ -110,8 +109,7 @@ static int __init riscv_timer_init_dt(struct device_node *n)
 		return 0;
 
 	riscv_timebase = riscv_timebase_frequency(n);
-	cs = per_cpu_ptr(&riscv_clocksource, cpuid);
-	clocksource_register_hz(cs, riscv_timebase);
+	clocksource_register_hz(&riscv_clocksource, riscv_timebase);
 
 	error = cpuhp_setup_state(CPUHP_AP_RISCV_TIMER_STARTING,
 			 "clockevents/riscv/timer:starting",
-- 
2.7.4