drivers: Update timer APIs for Linux v6.15

In Linux v6.15, the timer APIs hrtimer_init() and del_timer() have been
removed. The hrtimer_setup() was added in Linux v6.13 to replace
hrtimer_init() and hrtimer_init() have finally been removed. The
functions del_timer()/del_timer_sync() were renamed to
timer_delete()/timer_delete_sync() in Linux v6.15. Use conftest to
detect these changes and update the drivers as necessary.

JIRA LINQPJ14-47

Change-Id: Id3994900384aad4b91155507cda91e04898ab12c
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3336168
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>

drivers/block/tegra_virt_storage/tegra_hv_vblk.c

@@ -193,7 +193,11 @@ static void vblk_put_req(struct vsc_request *req)
 			(vblkdev->queue_state == VBLK_QUEUE_SUSPENDED)) {
 			complete(&vblkdev->req_queue_empty);
 		}
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+		timer_delete(&req->timer);
+#else
 		del_timer(&req->timer);
+#endif
 	}
 }
 

drivers/gpu/host1x-emu/poll.c

@@ -1,5 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0-only
 // SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+#include <nvidia/conftest.h>
+
 #include "dev.h"
 #include "fence.h"
 #include "poll.h"
@@ -178,8 +181,13 @@ void host1x_poll_start(struct host1x *host)
 
 		hr_timer_host = host;
 		ktime = ktime_set(HRTIMER_TIMEOUT_SEC, host->hr_polling_intrval);
+#if defined(NV_HRTIMER_SETUP_PRESENT) /* Linux v6.13 */
+		hrtimer_setup(&emu_hr_timer, &timer_callback, CLOCK_MONOTONIC,
+			      HRTIMER_MODE_REL);
+#else
 		hrtimer_init(&emu_hr_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		emu_hr_timer.function = &timer_callback;
+#endif
 		hrtimer_start(&emu_hr_timer, ktime, HRTIMER_MODE_REL);
 	}
 #endif

drivers/media/platform/tegra/cdi/cdi_mgr.c

@@ -1782,9 +1782,14 @@ static int cdi_mgr_probe(struct platform_device *pdev)
 	for (i = 0; i < ARRAY_SIZE(cdi_mgr->gpios); i++) {
 		pin = &cdi_mgr->gpios[i];
 		pin->mgr = cdi_mgr;
+#if defined(NV_HRTIMER_SETUP_PRESENT) /* Linux v6.13 */
+		hrtimer_setup(&pin->timers.timer, &cdi_mgr_intr_timer,
+			      CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+#else
 		hrtimer_init(&pin->timers.timer, CLOCK_MONOTONIC,
 			HRTIMER_MODE_ABS);
 		pin->timers.timer.function = &cdi_mgr_intr_timer;
+#endif
 	}
 
 	if (pdev->dev.of_node) {

drivers/media/platform/tegra/v4l2loopback/v4l2loopback.c

@@ -36,6 +36,8 @@
 #include <linux/miscdevice.h>
 #include "v4l2loopback.h"
 
+#include <nvidia/conftest.h>
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
 #error This module is not supported on kernels before 4.0.0.
 #endif
@@ -1706,8 +1708,13 @@ static int vidioc_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 static void buffer_written(struct v4l2_loopback_device *dev,
 			   struct v4l2l_buffer *buf)
 {
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&dev->sustain_timer);
+	timer_delete_sync(&dev->timeout_timer);
+#else
 	del_timer_sync(&dev->sustain_timer);
 	del_timer_sync(&dev->timeout_timer);
+#endif
 
 	spin_lock_bh(&dev->list_lock);
 	list_move_tail(&buf->list_head, &dev->outbufs_list);
@@ -2274,8 +2281,13 @@ static int v4l2_loopback_close(struct file *file)
 
 	atomic_dec(&dev->open_count);
 	if (dev->open_count.counter == 0) {
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+		timer_delete_sync(&dev->sustain_timer);
+		timer_delete_sync(&dev->timeout_timer);
+#else
 		del_timer_sync(&dev->sustain_timer);
 		del_timer_sync(&dev->timeout_timer);
+#endif
 	}
 	try_free_buffers(dev);
 

drivers/misc/bluedroid_pm.c

@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-// SPDX-FileCopyrightText: Copyright (c) 2019-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-
-#include <nvidia/conftest.h>
+// SPDX-FileCopyrightText: Copyright (c) 2019-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 #include <nvidia/conftest.h>
 
@@ -267,7 +265,11 @@ static ssize_t lpm_write_proc(struct file *file, const char __user *buffer,
 			bluedroid_pm_gpio_set_value(
 				bluedroid_pm->ext_wake, 1);
 			__pm_stay_awake(&bluedroid_pm->wake_lock);
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+			timer_delete(&bluedroid_pm_timer);
+#else
 			del_timer(&bluedroid_pm_timer);
+#endif
 			set_bit(BT_WAKE, &bluedroid_pm->flags);
 		} else {
 			kfree(buf);
@@ -507,7 +509,11 @@ static int bluedroid_pm_remove(struct platform_device *pdev)
 	if ((bluedroid_pm->ext_wake)) {
 		wakeup_source_destroy(&bluedroid_pm->wake_lock);
 		remove_bt_proc_interface();
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+		timer_delete(&bluedroid_pm_timer);
+#else
 		del_timer(&bluedroid_pm_timer);
+#endif
 	}
 	if (((bluedroid_pm->gpio_reset)) ||
 		((bluedroid_pm->gpio_shutdown)) ||

drivers/net/can/mttcan/native/m_ttcan_linux.c

@@ -1,7 +1,5 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2022-2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
- */
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2022-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 #include <nvidia/conftest.h>
 
@@ -1954,7 +1952,11 @@ static int mttcan_remove(struct platform_device *pdev)
 
 	dev_info(&dev->dev, "%s\n", __func__);
 
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&priv->timer);
+#else
 	del_timer_sync(&priv->timer);
+#endif
 	mttcan_delete_sys_files(&dev->dev);
 	unregister_mttcan_dev(dev);
 	mttcan_unprepare_clock(priv);

drivers/net/ethernet/nvidia/nvethernet/ether_linux.c

@@ -3394,7 +3394,11 @@ int ether_close(struct net_device *ndev)
 	int i;
 
 #ifdef ETHER_NVGRO
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&pdata->nvgro_timer);
+#else
 	del_timer_sync(&pdata->nvgro_timer);
+#endif
 	/* TODO: purge the queues */
 #endif
 
@@ -7514,10 +7518,16 @@ int ether_probe(struct platform_device *pdev)
 		chan = osi_dma->dma_chans[i];
 		atomic_set(&pdata->tx_napi[chan]->tx_usecs_timer_armed,
 			   OSI_DISABLE);
+#if defined(NV_HRTIMER_SETUP_PRESENT) /* Linux v6.13 */
+		hrtimer_setup(&pdata->tx_napi[chan]->tx_usecs_timer,
+			      ether_tx_usecs_hrtimer, CLOCK_MONOTONIC,
+			      HRTIMER_MODE_REL);
+#else
 		hrtimer_init(&pdata->tx_napi[chan]->tx_usecs_timer,
 			     CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		pdata->tx_napi[chan]->tx_usecs_timer.function =
 			ether_tx_usecs_hrtimer;
+#endif
 	}
 
 	ret = register_netdev(ndev);

drivers/nvpps/nvpps_main.c

@@ -509,7 +509,11 @@ static int set_mode(struct nvpps_device_data *pdev_data, u32 mode)
 				if (!pdev_data->only_timer_mode) {
 					if (pdev_data->timer_inited) {
 						pdev_data->timer_inited = false;
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+						timer_delete_sync(&pdev_data->timer);
+#else
 						del_timer_sync(&pdev_data->timer);
+#endif
 					}
 					if (!pdev_data->irq_registered) {
 						/* register IRQ handler */
@@ -1377,7 +1381,11 @@ static int nvpps_remove(struct platform_device *pdev)
 	if (pdev_data) {
 		if (pdev_data->timer_inited) {
 			pdev_data->timer_inited = false;
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+			timer_delete_sync(&pdev_data->timer);
+#else
 			del_timer_sync(&pdev_data->timer);
+#endif
 		}
 		if (pdev_data->mac_base_addr) {
 			devm_iounmap(&pdev->dev, pdev_data->mac_base_addr);
@@ -1385,7 +1393,11 @@ static int nvpps_remove(struct platform_device *pdev)
 				pdev_data->mac_base_addr);
 		}
 		if (pdev_data->support_tsc) {
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+			timer_delete_sync(&pdev_data->tsc_timer);
+#else
 			del_timer_sync(&pdev_data->tsc_timer);
+#endif
 			iounmap(pdev_data->tsc_reg_map_base);
 		}
 		device_destroy(s_nvpps_class, pdev_data->dev->devt);

drivers/platform/tegra/nvadsp/emc_dfs.c

@@ -1,21 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2014-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 /*
- * emc_dfs.c
- *
  * Emc dynamic frequency scaling due to APE
- *
- * Copyright (C) 2014-2020, NVIDIA Corporation. All rights reserved.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
+#include <nvidia/conftest.h>
 #include <linux/tegra_nvadsp.h>
 #include <linux/tick.h>
 #include <linux/timer.h>
@@ -193,7 +182,11 @@ static void emc_dfs_disable(void)
 	einfo->rd_cnt = read64((u32)ABRIDGE_STATS_READ_0);
 	einfo->wr_cnt = read64((u32)ABRIDGE_STATS_WRITE_0);
 
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&einfo->cnt_timer);
+#else
 	del_timer_sync(&einfo->cnt_timer);
+#endif
 }
 
 #ifdef CONFIG_DEBUG_FS

drivers/virt/tegra/tegra_hv_vcpu_yield.c

@@ -139,9 +139,14 @@ static int tegra_hv_vcpu_yield_open(struct inode *inode, struct file *filp)
 
 	mutex_unlock(&data->mutex_lock);
 
+#if defined(NV_HRTIMER_SETUP_PRESENT) /* Linux v6.13 */
+	hrtimer_setup(&data->yield_timer, &timer_callback_func,
+		      CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
+#else
 	hrtimer_init(&data->yield_timer, CLOCK_MONOTONIC,
 		HRTIMER_MODE_REL_PINNED);
 	data->yield_timer.function = &timer_callback_func;
+#endif
 
 out:
 	return ret;

drivers/watchdog/softdog-platform.c

@@ -1,8 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2014-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 /*
  * A platform based Software Watchdog Device
- *
- * SPDX-FileCopyrightText: Copyright (c) 2014-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
  */
 
 #include <nvidia/conftest.h>
@@ -186,7 +185,11 @@ static int softdog_platform_probe(struct platform_device *pdev)
 reboot_unreg:
 	unregister_reboot_notifier(&swdt->nb);
 timer_del:
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&swdt->watchdog_ticktock);
+#else
 	del_timer_sync(&swdt->watchdog_ticktock);
+#endif
 	return ret;
 }
 
@@ -194,7 +197,11 @@ static int softdog_platform_remove(struct platform_device *pdev)
 {
 	struct softdog_platform_wdt *swdt = platform_get_drvdata(pdev);
 
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&swdt->watchdog_ticktock);
+#else
 	del_timer_sync(&swdt->watchdog_ticktock);
+#endif
 	watchdog_unregister_device(&swdt->wdt_dev);
 	unregister_reboot_notifier(&swdt->nb);
 	return 0;
@@ -204,7 +211,11 @@ static void softdog_platform_shutdown(struct platform_device *pdev)
 {
 	struct softdog_platform_wdt *swdt = platform_get_drvdata(pdev);
 
+#if defined(NV_TIMER_DELETE_PRESENT) /* Linux v6.15 */
+	timer_delete_sync(&swdt->watchdog_ticktock);
+#else
 	del_timer_sync(&swdt->watchdog_ticktock);
+#endif
 }
 
 #ifdef CONFIG_PM_SLEEP

scripts/conftest/Makefile

@@ -149,6 +149,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += fop_unsigned_offset
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += genpd_xlate_t_has_const_of_phandle_args
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += get_file_rcu_has_double_ptr_file_arg
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += get_user_pages
+NV_CONFTEST_FUNCTION_COMPILE_TESTS += hrtimer_setup
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += icc_get
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += icc_put
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += icc_set_bw
@@ -222,6 +223,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += tegra_ivc_use_ivc_ext_driver
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += thermal_zone_device_priv
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += thermal_zone_device_ops_struct_has_get_trip_type
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += thermal_zone_for_each_trip
+NV_CONFTEST_FUNCTION_COMPILE_TESTS += timer_delete
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += tty_operations_struct_send_xchar_has_u8_arg
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += tty_operations_struct_write_has_u8_ptr_arg
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += tty_operations_struct_set_termios_has_const_ktermios_arg

scripts/conftest/conftest.sh

@@ -7682,6 +7682,22 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_GPIO_DEVICE_GET_CHIP_PRESENT" "" "functions"
         ;;
 
+        hrtimer_setup)
+            #
+            # Determine if the function hrtimer_setup() is present.
+            #
+            # This change was made in Linux v6.13 by commit 908a1d775422
+            # ("hrtimers: Introduce hrtimer_setup() to replace hrtimer_init()").
+            #
+            CODE="
+            #include <linux/hrtimer.h>
+            bool conftest_hrtimer_setup(void) {
+                return hrtimer_setup();
+            }"
+
+            compile_check_conftest "$CODE" "NV_HRTIMER_SETUP_PRESENT" "" "functions"
+        ;;
+
         netif_set_tso_max_size)
             #
             # Determine if netif_set_tso_max_size() function is present
@@ -8680,6 +8696,22 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_TEGRA_DEV_IOMMU_GET_STREAM_ID_PRESENT" "" "functions"
         ;;
 
+        timer_delete)
+            #
+            # Determine if the function timer_delete() is present.
+            #
+            # This change was made in Linux v6.15 by commit 8fa7292fee5c
+            # ("treewide: Switch/rename to timer_delete[_sync]()").
+            #
+            CODE="
+            #include <linux/timer.h>
+            bool conftest_timer_delete(void) {
+                return timer_delete();
+            }"
+
+            compile_check_conftest "$CODE" "NV_TIMER_DELETE_PRESENT" "" "functions"
+        ;;
+
         tty_operations_struct_send_xchar_has_u8_arg)
             #
             # Determine if the struct tty_operations::send_xchar argument is of type u8.