unimore/kernel-hacking-2024-linux-steffo
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nvmem: core: Notify when a new layout is registered

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Tell listeners a new layout was introduced and is now available.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230823132744.350618-23-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Miquel Raynal 2023-08-23 14:27:44 +01:00 committed by Greg Kroah-Hartman
parent b97400912a
commit eb176cb461
2 changed files with 6 additions and 0 deletions
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4
drivers/nvmem/core.c
View file

@ -771,12 +771,16 @@ int __nvmem_layout_register(struct nvmem_layout *layout, struct module *owner)
list_add(&layout->node, &nvmem_layouts);
spin_unlock(&nvmem_layout_lock);
blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_ADD, layout);
return 0;
}
EXPORT_SYMBOL_GPL(__nvmem_layout_register);
void nvmem_layout_unregister(struct nvmem_layout *layout)
{
blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_REMOVE, layout);
spin_lock(&nvmem_layout_lock);
list_del(&layout->node);
spin_unlock(&nvmem_layout_lock);

2
include/linux/nvmem-consumer.h
View file

@ -43,6 +43,8 @@ enum {
NVMEM_REMOVE,
NVMEM_CELL_ADD,
NVMEM_CELL_REMOVE,
NVMEM_LAYOUT_ADD,
NVMEM_LAYOUT_REMOVE,
};
#if IS_ENABLED(CONFIG_NVMEM)