linux-kernel - [PATCH v2 07/30] misc: vmw_vmci_defs: Mark 'struct vmci_handle VMCI_ANON_SRC_HANDLE' as __maybe

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Date:   Wed,  1 Jul 2020 09:30:55 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     arnd@...db.de, gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
        George Zhang <georgezhang@...are.com>
Subject: [PATCH v2 07/30] misc: vmw_vmci_defs: Mark 'struct vmci_handle VMCI_ANON_SRC_HANDLE' as __maybe_unused

vmw_vmci_defs.h is included by multiple source files.  Some of which
do not make use of 'struct vmci_handle VMCI_ANON_SRC_HANDLE' rendering
it unused.  Ensure the compiler knows that this is in fact intentional
by marking it as __maybe_unused.  This fixes the following W=1 warnings:

 In file included from drivers/misc/vmw_vmci/vmci_context.c:8:
 include/linux/vmw_vmci_defs.h:162:33: warning: ‘VMCI_ANON_SRC_HANDLE’ defined but not used [-Wunused-const-variable=]
 162 | static const struct vmci_handle VMCI_ANON_SRC_HANDLE = {
 | ^~~~~~~~~~~~~~~~~~~~
 In file included from drivers/misc/vmw_vmci/vmci_datagram.c:8:
 include/linux/vmw_vmci_defs.h:162:33: warning: ‘VMCI_ANON_SRC_HANDLE’ defined but not used [-Wunused-const-variable=]
 162 | static const struct vmci_handle VMCI_ANON_SRC_HANDLE = {
| ^~~~~~~~~~~~~~~~~~~~

Cc: George Zhang <georgezhang@...are.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 arch/arm/mach-omap2/mmc.h              | 4 ----
 drivers/mmc/host/omap.c                | 1 -
 include/linux/platform_data/mmc-omap.h | 3 +++
 include/linux/vmw_vmci_defs.h          | 2 +-
 4 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-omap2/mmc.h b/arch/arm/mach-omap2/mmc.h
index 7f4e053c34344..b5533e93cb632 100644
--- a/arch/arm/mach-omap2/mmc.h
+++ b/arch/arm/mach-omap2/mmc.h
@@ -16,7 +16,3 @@ static inline int omap_msdi_reset(struct omap_hwmod *oh)
 	return 0;
 }
 #endif
-
-/* called from board-specific card detection service routine */
-extern void omap_mmc_notify_cover_event(struct device *dev, int slot,
-					int is_closed);
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 33d7af7c7762a..6e4199556d000 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -28,7 +28,6 @@
 #include <linux/slab.h>
 #include <linux/platform_data/mmc-omap.h>
 
-
 #define	OMAP_MMC_REG_CMD	0x00
 #define	OMAP_MMC_REG_ARGL	0x01
 #define	OMAP_MMC_REG_ARGH	0x02
diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h
index 9acf0e87aa9be..f0b8947e6b07d 100644
--- a/include/linux/platform_data/mmc-omap.h
+++ b/include/linux/platform_data/mmc-omap.h
@@ -116,3 +116,6 @@ struct omap_mmc_platform_data {
 
 	} slots[OMAP_MMC_MAX_SLOTS];
 };
+
+extern void omap_mmc_notify_cover_event(struct device *dev, int slot,
+					int is_closed);
diff --git a/include/linux/vmw_vmci_defs.h b/include/linux/vmw_vmci_defs.h
index fefb5292403bc..be0afe6f379ba 100644
--- a/include/linux/vmw_vmci_defs.h
+++ b/include/linux/vmw_vmci_defs.h
@@ -159,7 +159,7 @@ static inline bool vmci_handle_is_invalid(struct vmci_handle h)
  */
 #define VMCI_ANON_SRC_CONTEXT_ID   VMCI_INVALID_ID
 #define VMCI_ANON_SRC_RESOURCE_ID  VMCI_INVALID_ID
-static const struct vmci_handle VMCI_ANON_SRC_HANDLE = {
+static const struct vmci_handle __maybe_unused VMCI_ANON_SRC_HANDLE = {
 	.context = VMCI_ANON_SRC_CONTEXT_ID,
 	.resource = VMCI_ANON_SRC_RESOURCE_ID
 };
-- 
2.25.1