diff mbox

[05/11] platform: use a dedicated list_head for early devices

Message ID 20180424173051.15099-6-brgl@bgdev.pl (mailing list archive)
State New, archived
Headers show

Commit Message

Bartosz Golaszewski April 24, 2018, 5:30 p.m. UTC 
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

The current implementation of early platform device support uses the
devres list head in struct device. This causes problems when adding
support for device tree based early devices. Use a dedicated list_head
which is included in struct device conditionally in order to avoid
adding bloat for all architectures.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/base/platform.c | 23 +++++++++++------------
 include/linux/device.h  |  4 ++++
 2 files changed, 15 insertions(+), 12 deletions(-)

Comments

kernel test robot April 26, 2018, 4:27 a.m. UTC | #1 
Hi Bartosz,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v4.17-rc2]
[cannot apply to next-20180424]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Bartosz-Golaszewski/platform-device-tree-support-for-early-platform-drivers/20180426-003135
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   include/net/mac80211.h:2083: warning: bad line: >
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'rx_stats_avg' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'rx_stats_avg.signal' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'rx_stats_avg.chain_signal' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.filtered' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.retry_failed' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.retry_count' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.lost_packets' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.last_tdls_pkt_time' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.msdu_retries' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.msdu_failed' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.last_ack' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.last_ack_signal' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'status_stats.ack_signal_filled' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'tx_stats.packets' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'tx_stats.bytes' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'tx_stats.last_rate' not described in 'sta_info'
   net/mac80211/sta_info.h:586: warning: Function parameter or member 'tx_stats.msdu' not described in 'sta_info'
   kernel/sched/fair.c:3731: warning: Function parameter or member 'flags' not described in 'attach_entity_load_avg'
   include/linux/dma-buf.h:307: warning: Function parameter or member 'cb_excl.cb' not described in 'dma_buf'
   include/linux/dma-buf.h:307: warning: Function parameter or member 'cb_excl.poll' not described in 'dma_buf'
   include/linux/dma-buf.h:307: warning: Function parameter or member 'cb_excl.active' not described in 'dma_buf'
   include/linux/dma-buf.h:307: warning: Function parameter or member 'cb_shared.cb' not described in 'dma_buf'
   include/linux/dma-buf.h:307: warning: Function parameter or member 'cb_shared.poll' not described in 'dma_buf'
   include/linux/dma-buf.h:307: warning: Function parameter or member 'cb_shared.active' not described in 'dma_buf'
   include/linux/dma-fence-array.h:54: warning: Function parameter or member 'work' not described in 'dma_fence_array'
   Error: Cannot open file drivers/base/firmware_class.c
   WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -function request_firmware drivers/base/firmware_class.c' failed with return code 1
   Error: Cannot open file drivers/base/firmware_class.c
   WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -function request_firmware_direct drivers/base/firmware_class.c' failed with return code 1
   Error: Cannot open file drivers/base/firmware_class.c
   WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -function request_firmware_into_buf drivers/base/firmware_class.c' failed with return code 1
   Error: Cannot open file drivers/base/firmware_class.c
   WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -function request_firmware_nowait drivers/base/firmware_class.c' failed with return code 1
   Error: Cannot open file drivers/base/firmware_class.c
   WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -function firmware_request_cache drivers/base/firmware_class.c' failed with return code 1
   include/linux/gpio/driver.h:142: warning: Function parameter or member 'request_key' not described in 'gpio_irq_chip'
   include/linux/iio/iio.h:270: warning: Function parameter or member 'scan_type.sign' not described in 'iio_chan_spec'
   include/linux/iio/iio.h:270: warning: Function parameter or member 'scan_type.realbits' not described in 'iio_chan_spec'
   include/linux/iio/iio.h:270: warning: Function parameter or member 'scan_type.storagebits' not described in 'iio_chan_spec'
   include/linux/iio/iio.h:270: warning: Function parameter or member 'scan_type.shift' not described in 'iio_chan_spec'
   include/linux/iio/iio.h:270: warning: Function parameter or member 'scan_type.repeat' not described in 'iio_chan_spec'
   include/linux/iio/iio.h:270: warning: Function parameter or member 'scan_type.endianness' not described in 'iio_chan_spec'
   include/linux/iio/hw-consumer.h:1: warning: no structured comments found
>> include/linux/device.h:998: warning: Function parameter or member 'early_dev_head' not described in 'device'
   Error: Cannot open file drivers/base/firmware_class.c
   Error: Cannot open file drivers/base/firmware_class.c
   WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -export drivers/base/firmware_class.c' failed with return code 2
   include/linux/input/sparse-keymap.h:46: warning: Function parameter or member 'sw' not described in 'key_entry'
   include/linux/mtd/rawnand.h:752: warning: Function parameter or member 'timings.sdr' not described in 'nand_data_interface'
   include/linux/mtd/rawnand.h:817: warning: Function parameter or member 'buf' not described in 'nand_op_data_instr'
   include/linux/mtd/rawnand.h:817: warning: Function parameter or member 'buf.in' not described in 'nand_op_data_instr'
   include/linux/mtd/rawnand.h:817: warning: Function parameter or member 'buf.out' not described in 'nand_op_data_instr'
   include/linux/mtd/rawnand.h:863: warning: Function parameter or member 'ctx' not described in 'nand_op_instr'
   include/linux/mtd/rawnand.h:863: warning: Function parameter or member 'ctx.cmd' not described in 'nand_op_instr'
   include/linux/mtd/rawnand.h:863: warning: Function parameter or member 'ctx.addr' not described in 'nand_op_instr'
   include/linux/mtd/rawnand.h:863: warning: Function parameter or member 'ctx.data' not described in 'nand_op_instr'
   include/linux/mtd/rawnand.h:863: warning: Function parameter or member 'ctx.waitrdy' not described in 'nand_op_instr'
   include/linux/mtd/rawnand.h:1010: warning: Function parameter or member 'ctx' not described in 'nand_op_parser_pattern_elem'
   include/linux/mtd/rawnand.h:1010: warning: Function parameter or member 'ctx.addr' not described in 'nand_op_parser_pattern_elem'
   include/linux/mtd/rawnand.h:1010: warning: Function parameter or member 'ctx.data' not described in 'nand_op_parser_pattern_elem'
   include/linux/mtd/rawnand.h:1313: warning: Function parameter or member 'manufacturer.desc' not described in 'nand_chip'
   include/linux/mtd/rawnand.h:1313: warning: Function parameter or member 'manufacturer.priv' not described in 'nand_chip'
   include/linux/regulator/driver.h:222: warning: Function parameter or member 'resume_early' not described in 'regulator_ops'
   drivers/regulator/core.c:4306: warning: Excess function parameter 'state' description in 'regulator_suspend_late'
   arch/s390/include/asm/cio.h:245: warning: Function parameter or member 'esw.esw0' not described in 'irb'
   arch/s390/include/asm/cio.h:245: warning: Function parameter or member 'esw.esw1' not described in 'irb'
   arch/s390/include/asm/cio.h:245: warning: Function parameter or member 'esw.esw2' not described in 'irb'
   arch/s390/include/asm/cio.h:245: warning: Function parameter or member 'esw.esw3' not described in 'irb'
   arch/s390/include/asm/cio.h:245: warning: Function parameter or member 'esw.eadm' not described in 'irb'
   drivers/usb/typec/mux.c:186: warning: Function parameter or member 'mux' not described in 'typec_mux_unregister'
   drivers/usb/typec/mux.c:186: warning: Excess function parameter 'sw' description in 'typec_mux_unregister'

vim +998 include/linux/device.h

^1da177e Linus Torvalds 2005-04-16 @998  

:::::: The code at line 998 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
diff mbox

Patch

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index af440d703f0b..90526acdcb84 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1264,12 +1264,10 @@  void __init early_platform_add_devices(struct platform_device **devs, int num)
 	for (i = 0; i < num; i++) {
 		dev = &devs[i]->dev;
 
-		if (!dev->devres_head.next) {
-			pm_runtime_early_init(dev);
-			INIT_LIST_HEAD(&dev->devres_head);
-			list_add_tail(&dev->devres_head,
-				      &early_platform_device_list);
-		}
+		pm_runtime_early_init(dev);
+		INIT_LIST_HEAD(&dev->early_dev_head);
+		list_add_tail(&dev->early_dev_head,
+			      &early_platform_device_list);
 	}
 }
 
@@ -1310,7 +1308,7 @@  early_platform_match(struct early_platform_driver *epdrv, int id)
 {
 	struct platform_device *pd;
 
-	list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
+	list_for_each_entry(pd, &early_platform_device_list, dev.early_dev_head)
 		if (platform_match(&pd->dev, &epdrv->pdrv->driver))
 			if (pd->id == id)
 				return pd;
@@ -1328,7 +1326,7 @@  static int __init early_platform_left(struct early_platform_driver *epdrv,
 {
 	struct platform_device *pd;
 
-	list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
+	list_for_each_entry(pd, &early_platform_device_list, dev.early_dev_head)
 		if (platform_match(&pd->dev, &epdrv->pdrv->driver))
 			if (pd->id >= id)
 				return 1;
@@ -1465,11 +1463,12 @@  void __init early_platform_cleanup(void)
 {
 	struct platform_device *pd, *pd2;
 
-	/* clean up the devres list used to chain devices */
+	/* clean up the list used to chain devices */
 	list_for_each_entry_safe(pd, pd2, &early_platform_device_list,
-				 dev.devres_head) {
-		list_del(&pd->dev.devres_head);
-		memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
+				 dev.early_dev_head) {
+		list_del(&pd->dev.early_dev_head);
+		memset(&pd->dev.early_dev_head, 0,
+		       sizeof(pd->dev.early_dev_head));
 	}
 }
 
diff --git a/include/linux/device.h b/include/linux/device.h
index 0059b99e1f25..4fadba0f9a35 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -979,6 +979,10 @@  struct device {
 	spinlock_t		devres_lock;
 	struct list_head	devres_head;
 
+#ifdef CONFIG_EARLY_PLATFORM_DEVICES
+	struct list_head	early_dev_head;
+#endif
+
 	struct klist_node	knode_class;
 	struct class		*class;
 	const struct attribute_group **groups;	/* optional groups */