linux-kernel - [PATCH] drivers/firmware: psci: Convert timers to use timer

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Message-ID: <20171024101331.GA69243@beast>
Date:   Tue, 24 Oct 2017 03:13:31 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Mark Rutland <mark.rutland@....com>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] drivers/firmware: psci: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Also adds missing call to
destroy_timer_on_stack().

Cc: Mark Rutland <mark.rutland@....com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/firmware/psci_checker.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/psci_checker.c b/drivers/firmware/psci_checker.c
index 6523ce962865..f3f4f810e5df 100644
--- a/drivers/firmware/psci_checker.c
+++ b/drivers/firmware/psci_checker.c
@@ -220,7 +220,7 @@ static int hotplug_tests(void)
 	return err;
 }
 
-static void dummy_callback(unsigned long ignored) {}
+static void dummy_callback(struct timer_list *unused) {}
 
 static int suspend_cpu(int index, bool broadcast)
 {
@@ -287,7 +287,7 @@ static int suspend_test_thread(void *arg)
 	pr_info("CPU %d entering suspend cycles, states 1 through %d\n",
 		cpu, drv->state_count - 1);
 
-	setup_timer_on_stack(&wakeup_timer, dummy_callback, 0);
+	timer_setup_on_stack(&wakeup_timer, dummy_callback, 0);
 	for (i = 0; i < NUM_SUSPEND_CYCLE; ++i) {
 		int index;
 		/*
@@ -340,6 +340,7 @@ static int suspend_test_thread(void *arg)
 	 * later.
 	 */
 	del_timer(&wakeup_timer);
+	destroy_timer_on_stack(&wakeup_timer);
 
 	if (atomic_dec_return_relaxed(&nb_active_threads) == 0)
 		complete(&suspend_threads_done);
-- 
2.7.4


-- 
Kees Cook
Pixel Security