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From: Tianfei Zhang <tianfei.zhang@intel.com>
To: bhelgaas@google.com, linux-pci@vger.kernel.org,
	linux-fpga@vger.kernel.org, lukas@wunner.de, kabel@kernel.org,
	mani@kernel.org, pali@kernel.org, mdf@kernel.org,
	hao.wu@intel.com, yilun.xu@intel.com, trix@redhat.com,
	jgg@ziepe.ca, ira.weiny@intel.com,
	andriy.shevchenko@linux.intel.com, dan.j.williams@intel.com,
	keescook@chromium.org, rafael@kernel.org,
	russell.h.weight@intel.com, corbet@lwn.net,
	linux-doc@vger.kernel.org, ilpo.jarvinen@linux.intel.com,
	lee@kernel.org, gregkh@linuxfoundation.org,
	matthew.gerlach@linux.intel.com
Cc: Tianfei Zhang <tianfei.zhang@intel.com>
Subject: [PATCH v1 06/12] driver core: expose device_is_ancestor() API
Date: Wed, 18 Jan 2023 20:35:56 -0500	[thread overview]
Message-ID: <20230119013602.607466-7-tianfei.zhang@intel.com> (raw)
In-Reply-To: <20230119013602.607466-1-tianfei.zhang@intel.com>

Exposes device_is_ancestor() API which can be used
for check the device is the target device's ancestor or not.

Signed-off-by: Tianfei Zhang <tianfei.zhang@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/base/core.c    | 3 ++-
 include/linux/device.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index a3e14143ec0c..597192b38198 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -262,7 +262,7 @@ static void device_link_remove_from_lists(struct device_link *link)
 }
 #endif /* !CONFIG_SRCU */
 
-static bool device_is_ancestor(struct device *dev, struct device *target)
+bool device_is_ancestor(struct device *dev, struct device *target)
 {
 	while (target->parent) {
 		target = target->parent;
@@ -271,6 +271,7 @@ static bool device_is_ancestor(struct device *dev, struct device *target)
 	}
 	return false;
 }
+EXPORT_SYMBOL_GPL(device_is_ancestor);
 
 /**
  * device_is_dependent - Check if one device depends on another one
diff --git a/include/linux/device.h b/include/linux/device.h
index 44e3acae7b36..35e35982d9a5 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -909,6 +909,7 @@ int device_move(struct device *dev, struct device *new_parent,
 int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid);
 const char *device_get_devnode(struct device *dev, umode_t *mode, kuid_t *uid,
 			       kgid_t *gid, const char **tmp);
+bool device_is_ancestor(struct device *dev, struct device *target);
 int device_is_dependent(struct device *dev, void *target);
 
 static inline bool device_supports_offline(struct device *dev)
-- 
2.38.1


  parent reply	other threads:[~2023-01-19  1:33 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-19  1:35 [PATCH v1 00/12] add FPGA hotplug manager driver Tianfei Zhang
2023-01-19  1:35 ` [PATCH v1 01/12] PCI: hotplug: add new callbacks on hotplug_slot_ops Tianfei Zhang
2023-01-19 13:31   ` Greg KH
2023-01-19  1:35 ` [PATCH v1 02/12] PCI: hotplug: expose APIs from pciehp driver Tianfei Zhang
2023-01-19  1:35 ` [PATCH v1 03/12] PCI: hotplug: add and expose link disable API Tianfei Zhang
2023-01-19  1:35 ` [PATCH v1 04/12] PCI: hotplug: add FPGA PCI hotplug manager driver Tianfei Zhang
2023-01-19  1:35 ` [PATCH v1 05/12] fpga: dfl: register dfl-pci device into fpgahph driver Tianfei Zhang
2023-01-19  1:35 ` Tianfei Zhang [this message]
2023-01-19  1:35 ` [PATCH v1 07/12] PCI: hotplug: add register/unregister function for BMC device Tianfei Zhang
2023-01-19  1:35 ` [PATCH v1 08/12] fpga: m10bmc-sec: register BMC device into fpgahp driver Tianfei Zhang
2023-01-19  1:35 ` [PATCH v1 09/12] fpga: dfl: remove non-reserved devices Tianfei Zhang
2023-01-19  1:36 ` [PATCH v1 10/12] PCI: hotplug: implement the hotplug_slot_ops callback for fpgahp Tianfei Zhang
2023-01-19 13:28   ` Greg KH
2023-01-20 22:38     ` Russ Weight
2023-01-21  7:35       ` Greg KH
2023-01-19  1:36 ` [PATCH v1 11/12] fpga: m10bmc-sec: add m10bmc_sec_retimer_load callback Tianfei Zhang
2023-01-19 14:22   ` Lee Jones
2023-01-19  1:36 ` [PATCH v1 12/12] Documentation: fpga: add description of fpgahp driver Tianfei Zhang
2023-01-19  9:38   ` Bagas Sanjaya
2023-01-19  8:06 ` [PATCH v1 00/12] add FPGA hotplug manager driver Pali Rohár
2023-01-19  8:17   ` Zhang, Tianfei
2023-01-19 11:27     ` andriy.shevchenko
2023-01-19 12:09       ` Zhang, Tianfei
2023-01-19 13:33 ` Greg KH
2023-01-19 13:43   ` Rafael J. Wysocki
2023-01-19 15:33     ` Greg KH
2023-01-20 16:28   ` Russ Weight
2023-01-20 18:42     ` Lukas Wunner
2023-01-21  7:34       ` Greg KH

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