diff mbox series

[net-next] mlxsw: item: Annotate item helpers with '__maybe_unused'

Message ID 20211008132315.90211-1-idosch@idosch.org (mailing list archive)
State Accepted
Commit f12e658c620a925aba4caead54a05eb157728863
Delegated to: Netdev Maintainers
Headers show
Series [net-next] mlxsw: item: Annotate item helpers with '__maybe_unused' | expand

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Context Check Description
netdev/cover_letter success Single patches do not need cover letters
netdev/fixes_present success Fixes tag not required for -next series
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for net-next
netdev/subject_prefix success Link
netdev/cc_maintainers warning 2 maintainers not CCed: ndesaulniers@google.com llvm@lists.linux.dev
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success No Fixes tag
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success No static functions without inline keyword in header files

Commit Message

Ido Schimmel Oct. 8, 2021, 1:23 p.m. UTC 
From: Ido Schimmel <idosch@nvidia.com>

mlxsw is using helpers to get / set fields in messages exchanged with
the device. It is possible that some fields are only set or only get.
This causes LLVM to emit warnings such as the following when building
with W=1 [1]:

drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c:2022:1: warning: unused function 'mlxsw_afa_sampler_mirror_agent_get'

The fact that some fields are only set or only get is very much
intentional and not indicative of functions that need to be removed.

Therefore, annotate the item helpers with '__maybe_unused' to suppress
these warnings.

[1] https://lkml.org/lkml/2021/9/29/685

Cc: Nathan Chancellor <nathan@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/item.h | 56 ++++++++++++----------
 1 file changed, 32 insertions(+), 24 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Oct. 9, 2021, 12:30 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Fri,  8 Oct 2021 16:23:15 +0300 you wrote:
> From: Ido Schimmel <idosch@nvidia.com>
> 
> mlxsw is using helpers to get / set fields in messages exchanged with
> the device. It is possible that some fields are only set or only get.
> This causes LLVM to emit warnings such as the following when building
> with W=1 [1]:
> 
> [...]

Here is the summary with links:
  - [net-next] mlxsw: item: Annotate item helpers with '__maybe_unused'
    https://git.kernel.org/netdev/net-next/c/f12e658c620a

You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlxsw/item.h b/drivers/net/ethernet/mellanox/mlxsw/item.h
index e92cadc98128..ab70a873a01a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/item.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/item.h
@@ -270,11 +270,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u8 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
+static inline u8 __maybe_unused							\
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)			\
 {										\
 	return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
 }										\
-static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u8 val)\
+static inline void __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u8 val)			\
 {										\
 	__mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val);	\
 }
@@ -290,13 +292,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u8								\
+static inline u8 __maybe_unused							\
 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
 {										\
 	return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname),	\
 				 index);					\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
 					  u8 val)				\
 {										\
@@ -311,11 +313,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u16 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
+static inline u16 __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)			\
 {										\
 	return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
 }										\
-static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val)\
+static inline void __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val)			\
 {										\
 	__mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val);	\
 }
@@ -331,13 +335,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u16								\
+static inline u16 __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
 {										\
 	return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname),	\
 				  index);					\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
 					  u16 val)				\
 {										\
@@ -352,11 +356,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u32 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
+static inline u32 __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)			\
 {										\
 	return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
 }										\
-static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val)\
+static inline void __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val)			\
 {										\
 	__mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val);	\
 }
@@ -372,13 +378,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u32								\
+static inline u32 __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
 {										\
 	return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname),	\
 				  index);					\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
 					  u32 val)				\
 {										\
@@ -393,11 +399,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u64 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
+static inline u64 __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)			\
 {										\
 	return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
 }										\
-static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u64 val)\
+static inline void __maybe_unused						\
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u64 val)			\
 {										\
 	__mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), 0,	val);	\
 }
@@ -413,13 +421,13 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bits = _sizebits,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u64								\
+static inline u64 __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
 {										\
 	return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname),	\
 				  index);					\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
 					  u64 val)				\
 {										\
@@ -433,19 +441,19 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bytes = _sizebytes,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf, char *dst)	\
 {										\
 	__mlxsw_item_memcpy_from(buf, dst,					\
 				 &__ITEM_NAME(_type, _cname, _iname), 0);	\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, const char *src)	\
 {										\
 	__mlxsw_item_memcpy_to(buf, src,					\
 			       &__ITEM_NAME(_type, _cname, _iname), 0);		\
 }										\
-static inline char *								\
+static inline char * __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_data(char *buf)				\
 {										\
 	return __mlxsw_item_data(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
@@ -460,7 +468,7 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bytes = _sizebytes,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf,		\
 						  unsigned short index,		\
 						  char *dst)			\
@@ -468,7 +476,7 @@  mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf,		\
 	__mlxsw_item_memcpy_from(buf, dst,					\
 				 &__ITEM_NAME(_type, _cname, _iname), index);	\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf,			\
 						unsigned short index,		\
 						const char *src)		\
@@ -476,7 +484,7 @@  mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf,			\
 	__mlxsw_item_memcpy_to(buf, src,					\
 			       &__ITEM_NAME(_type, _cname, _iname), index);	\
 }										\
-static inline char *								\
+static inline char * __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_data(char *buf, unsigned short index)	\
 {										\
 	return __mlxsw_item_data(buf,						\
@@ -491,14 +499,14 @@  static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
 	.size = {.bytes = _sizebytes,},						\
 	.name = #_type "_" #_cname "_" #_iname,					\
 };										\
-static inline u8								\
+static inline u8 __maybe_unused							\
 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, u16 index)		\
 {										\
 	return __mlxsw_item_bit_array_get(buf,					\
 					  &__ITEM_NAME(_type, _cname, _iname),	\
 					  index);				\
 }										\
-static inline void								\
+static inline void __maybe_unused						\
 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 index, u8 val)		\
 {										\
 	return __mlxsw_item_bit_array_set(buf,					\