From: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> [ Upstream commit 9b8303fc6efa724bd6a90656434fbde2cc6ceb2c ] nvmem_cell_write's buf argument uses different types based on the configuration of CONFIG_NVMEM. The function prototype for enabled NVMEM uses 'void *' type, but the static dummy function for disabled NVMEM uses 'const char *' instead. Fix the different behaviour by always expecting a 'void *' typed buf argument. Fixes: 7a78a7f7695b ("power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface") Reported-by: kbuild test robot <lkp@xxxxxxxxx> Cc: Han Nandor <nandor.han@xxxxxxxxxxx> Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Cc: linux-kernel@xxxxxxxxxxxxxxx Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> Reviewed-By: Han Nandor <nandor.han@xxxxxxxxxxx> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Link: https://lore.kernel.org/r/20191029114240.14905-2-srinivas.kandagatla@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- include/linux/nvmem-consumer.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h index 8f8be5b000602..5c17cb7332241 100644 --- a/include/linux/nvmem-consumer.h +++ b/include/linux/nvmem-consumer.h @@ -118,7 +118,7 @@ static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len) } static inline int nvmem_cell_write(struct nvmem_cell *cell, - const char *buf, size_t len) + void *buf, size_t len) { return -EOPNOTSUPP; } -- 2.20.1