kernel/linux.git/drivers/hwspinlock/hwspinlock_core.c, branch v6.7

hwspinlock: remove MODULE_LICENSE in non-modules

2023-04-13T20:13:52+00:00

Since commit 8b41fc4454e ("kbuild: create modules.builtin without Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations are used to identify modules. As a consequence, uses of the macro in non-modules will cause modprobe to misidentify their containing object file as a module when it is not (false positives), and modprobe might succeed rather than failing with a suitable error message. So remove it in the files in this commit, none of which can be built as modules. Signed-off-by: Nick Alcock Suggested-by: Luis Chamberlain Cc: Luis Chamberlain Cc: linux-modules@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Hitomi Hasegawa Cc: Ohad Ben-Cohen Cc: Bjorn Andersson Cc: linux-remoteproc@vger.kernel.org Signed-off-by: Luis Chamberlain

hwspinlock: Use device_match_of_node()

2022-12-28T16:39:20+00:00

Replace the open-code with device_match_of_node(). Signed-off-by: ye xingchen Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Baolin Wang Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/202211251544369078587@zte.com.cn

hwspinlock: Let the PM runtime can be optional

2019-11-09T00:42:00+00:00

Now some hwspinlock controllers did not have the requirement to implement the PM runtime, but drivers must enable the PM runtime to comply with the hwspinlock core. Thus we can change the PM runtime support to be optional by validating the -EACCES error number which means the PM runtime is not enabled, and removing the return value validating of pm_runtime_put(). So that we can remove some redundant PM runtime code in drivers. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: Remove BUG_ON() from the hwspinlock core

2019-11-09T00:41:13+00:00

The original code use BUG_ON() to validate the parameters when locking or unlocking one hardware lock, but we should not crash the whole kernel though the hwlock parameters are incorrect, instead we can return the error number for users and give some warning. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: add the 'in_atomic' API

2019-06-30T04:08:14+00:00

Add the 'in_atomic' mode which can be called from an atomic context. This mode relies on the existing 'raw' mode (no lock, no preemption/irq disabling) with the difference that the timeout is not based on jiffies (jiffies won't increase when irq are disabled) but handled with busy-waiting udelay() calls. Signed-off-by: Fabien Dessenne Signed-off-by: Bjorn Andersson

hwspinlock: ignore disabled device

2019-06-29T19:05:06+00:00

Do not wait for hwspinlock device registration if it is not available for use. Acked-by: Suman Anna Signed-off-by: Fabien Dessenne Signed-off-by: Bjorn Andersson

hwspinlock: Fix incorrect return pointers

2018-07-31T03:54:51+00:00

The commit 4f1acd758b08 ("hwspinlock: Add devm_xxx() APIs to request/free hwlock") introduces one bug, that will return one error pointer if failed to request one hwlock, but we expect NULL pointer on error for consumers. This patch will fix this issue. Reported-by: Dan Carpenter Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: Fix one comment mistake

2018-06-26T20:46:34+00:00

Fix one comment mistake with correct function names. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: Add devm_xxx() APIs to register/unregister one hwlock controller

2018-06-26T20:46:23+00:00

This patch introduces devm_hwspin_lock_register() and devm_hwspin_lock_unregister() interfaces to help to register or unregister one hardware spinlock controller, that will help to simplify the cleanup code for hwspinlock drivers. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: Add devm_xxx() APIs to request/free hwlock

2018-06-26T20:27:58+00:00

This patch introduces some devm_xxx() APIs to help to request or free the hwlocks, which will help to simplify the cleanup code for drivers requesting one hwlock, ensuring that the hwlock is automatically freed whenever the device is unbound. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson