linux-kernel - [PATCH 4.4 22/93] nvmem: Declare nvmem_cell

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Message-Id: <20161006074732.065210945@linuxfoundation.org>
Date:   Thu,  6 Oct 2016 10:28:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 4.4 22/93] nvmem: Declare nvmem_cell_read() consistently

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Guenter Roeck <linux@...ck-us.net>

commit a6c50912508d80164a5e607993b617be85a46d73 upstream.

nvmem_cell_read() is declared as void * if CONFIG_NVMEM is enabled, and
as char * otherwise. This can result in a build warning if CONFIG_NVMEM
is not enabled and a caller asigns the result to a type other than char *
without using a typecast. Use a consistent declaration to avoid the
problem.

Fixes: e2a5402ec7c6 ("nvmem: Add nvmem_device based consumer apis.")
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/linux/nvmem-consumer.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -74,7 +74,7 @@ static inline void nvmem_cell_put(struct
 {
 }
 
-static inline char *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
+static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
 {
 	return ERR_PTR(-ENOSYS);
 }