Date:   Mon, 26 Sep 2016 11:21:51 +0530
From:   Sumit Saxena <sumit.saxena@...adcom.com>
To:     Baoyou Xie <baoyou.xie@...aro.org>, kashyap.desai@...gotech.com,
        sumit.saxena@...gotech.com, uday.lingala@...gotech.com,
        jejb@...ux.vnet.ibm.com, martin.petersen@...cle.com
Cc:     megaraidlinux.pdl@...gotech.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, arnd@...db.de, xie.baoyou@....com.cn
Subject: RE: [PATCH 1/3] megaraid_sas: mark symbols static where possible

>-----Original Message-----
>From: Baoyou Xie [mailto:baoyou.xie@...aro.org]
>Sent: Sunday, September 25, 2016 11:21 AM
>To: kashyap.desai@...gotech.com; sumit.saxena@...gotech.com;
>uday.lingala@...gotech.com; jejb@...ux.vnet.ibm.com;
>martin.petersen@...cle.com
>Cc: megaraidlinux.pdl@...gotech.com; linux-scsi@...r.kernel.org; linux-
>kernel@...r.kernel.org; arnd@...db.de; baoyou.xie@...aro.org;
>xie.baoyou@....com.cn
>Subject: [PATCH 1/3] megaraid_sas: mark symbols static where possible
>
>We get a few warnings when building kernel with W=1:
>drivers/scsi/megaraid/megaraid_sas_fp.c:94:5: warning: no previous
prototype
>for 'mega_mod64' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:112:5: warning: no previous
prototype
>for 'mega_div64_32' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:177:6: warning: no previous
prototype
>for 'MR_PopulateDrvRaidMap' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:315:5: warning: no previous
prototype
>for 'MR_GetSpanBlock' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:451:5: warning: no previous
prototype
>for 'mr_spanset_get_span_block' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:692:4: warning: no previous
prototype
>for 'get_arm' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:815:4: warning: no previous
prototype
>for 'MR_GetPhyParams' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fp.c:1293:4: warning: no previous
>prototype for 'megasas_get_best_arm_pd' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fusion.c:106:1: warning: no previous
>prototype for 'megasas_enable_intr_fusion' [-Wmissing-prototypes]
>drivers/scsi/megaraid/megaraid_sas_fusion.c:127:1: warning: no previous
>prototype for 'megasas_disable_intr_fusion' [-Wmissing-prototypes] ....
>
>In fact, these functions are only used in the file in which they are
declared and
>don't need a declaration, but can be made static.
>so this patch marks these functions with 'static'.
>
>Signed-off-by: Baoyou Xie <baoyou.xie@...aro.org>
>---
> drivers/scsi/megaraid/megaraid_sas_base.c   |  6 ++--
> drivers/scsi/megaraid/megaraid_sas_fp.c     | 30 ++++++++++-------
> drivers/scsi/megaraid/megaraid_sas_fusion.c | 52
+++++++++++++++--------------
> 3 files changed, 48 insertions(+), 40 deletions(-)
>
>diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c
>b/drivers/scsi/megaraid/megaraid_sas_base.c
>index c236c4d..1b033da 100644
>--- a/drivers/scsi/megaraid/megaraid_sas_base.c
>+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
>@@ -209,7 +209,7 @@ static int megasas_get_ld_vf_affiliation(struct
>megasas_instance *instance,  int megasas_check_mpio_paths(struct
>megasas_instance *instance,
> 			     struct scsi_cmnd *scmd);
>
>-int
>+static int
> megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd
>*cmd)  {
> 	instance->instancet->fire_cmd(instance,
>@@ -2057,7 +2057,7 @@ megasas_internal_reset_defer_cmds(struct
>megasas_instance *instance);  static void
process_fw_state_change_wq(struct
>work_struct *work);
>
>-void megasas_do_ocr(struct megasas_instance *instance)
>+static void megasas_do_ocr(struct megasas_instance *instance)
> {
> 	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
> 	(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) || @@ -
>3981,7 +3981,7 @@ int megasas_alloc_cmds(struct megasas_instance
*instance)
>  * Return 0 for only Fusion adapter, if driver load/unload is not in
progress
>  * or FW is not under OCR.
>  */
>-inline int
>+static inline int
> dcmd_timeout_ocr_possible(struct megasas_instance *instance) {
>
> 	if (!instance->ctrl_context)
>diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c
>b/drivers/scsi/megaraid/megaraid_sas_fp.c
>index e413113..d22bb59 100644
>--- a/drivers/scsi/megaraid/megaraid_sas_fp.c
>+++ b/drivers/scsi/megaraid/megaraid_sas_fp.c
>@@ -91,7 +91,7 @@ static u8 mr_spanset_get_phy_params(struct
>megasas_instance *instance, u32 ld,  static u64 get_row_from_strip(struct
>megasas_instance *instance, u32 ld,
> 	u64 strip, struct MR_DRV_RAID_MAP_ALL *map);
>
>-u32 mega_mod64(u64 dividend, u32 divisor)
>+static u32 mega_mod64(u64 dividend, u32 divisor)
> {
> 	u64 d;
> 	u32 remainder;
>@@ -109,7 +109,7 @@ u32 mega_mod64(u64 dividend, u32 divisor)
>  *
>  * @return quotient
>  **/
>-u64 mega_div64_32(uint64_t dividend, uint32_t divisor)
>+static u64 mega_div64_32(uint64_t dividend, uint32_t divisor)
> {
> 	u32 remainder;
> 	u64 d;
>@@ -174,7 +174,7 @@ static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld,
>u32 span,
> /*
>  * This function will Populate Driver Map using firmware raid map
>  */
>-void MR_PopulateDrvRaidMap(struct megasas_instance *instance)
>+static void MR_PopulateDrvRaidMap(struct megasas_instance *instance)
> {
> 	struct fusion_context *fusion = instance->ctrl_context;
> 	struct MR_FW_RAID_MAP_ALL     *fw_map_old    = NULL;
>@@ -312,8 +312,8 @@ u8 MR_ValidateMapInfo(struct megasas_instance
>*instance)
> 	return 1;
> }
>
>-u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk,
>-		    struct MR_DRV_RAID_MAP_ALL *map)
>+static u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk,
>+			   struct MR_DRV_RAID_MAP_ALL *map)
> {
> 	struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld,
>map);
> 	struct MR_QUAD_ELEMENT    *quad;
>@@ -448,8 +448,10 @@ static int getSpanInfo(struct MR_DRV_RAID_MAP_ALL
>*map,
> *    div_error	   - Devide error code.
> */
>
>-u32 mr_spanset_get_span_block(struct megasas_instance *instance,
>-		u32 ld, u64 row, u64 *span_blk, struct MR_DRV_RAID_MAP_ALL
>*map)
>+static u32
>+mr_spanset_get_span_block(struct megasas_instance *instance,
>+			  u32 ld, u64 row, u64 *span_blk,
>+			  struct MR_DRV_RAID_MAP_ALL *map)
> {
> 	struct fusion_context *fusion = instance->ctrl_context;
> 	struct MR_LD_RAID         *raid = MR_LdRaidGet(ld, map);
>@@ -689,8 +691,9 @@ static u32 get_arm_from_strip(struct megasas_instance
>*instance,  }
>
> /* This Function will return Phys arm */
>-u8 get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64
stripe,
>-		struct MR_DRV_RAID_MAP_ALL *map)
>+static u8
>+get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64 stripe,
>+	struct MR_DRV_RAID_MAP_ALL *map)
> {
> 	struct MR_LD_RAID  *raid = MR_LdRaidGet(ld, map);
> 	/* Need to check correct default value */ @@ -812,7 +815,8 @@
static
>u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld,
> *    span          - Span number
> *    block         - Absolute Block number in the physical disk
> */
>-u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64
stripRow,
>+static u8
>+MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64
>+stripRow,
> 		u16 stripRef, struct IO_REQUEST_INFO *io_info,
> 		struct RAID_CONTEXT *pRAID_Context,
> 		struct MR_DRV_RAID_MAP_ALL *map)
>@@ -1290,8 +1294,10 @@ void mr_update_load_balance_params(struct
>MR_DRV_RAID_MAP_ALL *drv_map,
> 	}
> }
>
>-u8 megasas_get_best_arm_pd(struct megasas_instance *instance,
>-	struct LD_LOAD_BALANCE_INFO *lbInfo, struct IO_REQUEST_INFO
>*io_info)
>+static u8
>+megasas_get_best_arm_pd(struct megasas_instance *instance,
>+			struct LD_LOAD_BALANCE_INFO *lbInfo,
>+			struct IO_REQUEST_INFO *io_info)
> {
> 	struct fusion_context *fusion;
> 	struct MR_LD_RAID  *raid;
>diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c
>b/drivers/scsi/megaraid/megaraid_sas_fusion.c
>index 52d8bbf..e7b77e1 100644
>--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
>+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
>@@ -102,7 +102,7 @@ static void megasas_free_reply_fusion(struct
>megasas_instance *instance);
>  * megasas_enable_intr_fusion -	Enables interrupts
>  * @regs:			MFI register set
>  */
>-void
>+static void
> megasas_enable_intr_fusion(struct megasas_instance *instance)  {
> 	struct megasas_register_set __iomem *regs; @@ -123,7 +123,7 @@
>megasas_enable_intr_fusion(struct megasas_instance *instance)
>  * megasas_disable_intr_fusion - Disables interrupt
>  * @regs:			 MFI register set
>  */
>-void
>+static void
> megasas_disable_intr_fusion(struct megasas_instance *instance)  {
> 	u32 mask = 0xFFFFFFFF;
>@@ -163,8 +163,8 @@ megasas_clear_intr_fusion(struct megasas_register_set
>__iomem *regs)
>  *
>  * Returns a blk_tag indexed mpt frame
>  */
>-inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct
>megasas_instance
>-						  *instance, u32 blk_tag)
>+static inline struct megasas_cmd_fusion * megasas_get_cmd_fusion(struct
>+megasas_instance *instance, u32 blk_tag)
> {
> 	struct fusion_context *fusion;
>
>@@ -384,7 +384,7 @@ static int megasas_create_sg_sense_fusion(struct
>megasas_instance *instance)
> 	return 0;
> }
>
>-int
>+static int
> megasas_alloc_cmdlist_fusion(struct megasas_instance *instance)  {
> 	u32 max_cmd, i;
>@@ -418,7 +418,7 @@ megasas_alloc_cmdlist_fusion(struct megasas_instance
>*instance)
> 	}
> 	return 0;
> }
>-int
>+static int
> megasas_alloc_request_fusion(struct megasas_instance *instance)  {
> 	struct fusion_context *fusion;
>@@ -456,7 +456,7 @@ megasas_alloc_request_fusion(struct megasas_instance
>*instance)
> 	return 0;
> }
>
>-int
>+static int
> megasas_alloc_reply_fusion(struct megasas_instance *instance)  {
> 	int i, count;
>@@ -498,7 +498,7 @@ megasas_alloc_reply_fusion(struct megasas_instance
>*instance)
> 	return 0;
> }
>
>-int
>+static int
> megasas_alloc_rdpq_fusion(struct megasas_instance *instance)  {
> 	int i, j, count;
>@@ -606,7 +606,7 @@ megasas_free_reply_fusion(struct megasas_instance
>*instance) {
>  * and is used as SMID of the cmd.
>  * SMID value range is from 1 to max_fw_cmds.
>  */
>-int
>+static int
> megasas_alloc_cmds_fusion(struct megasas_instance *instance)  {
> 	int i;
>@@ -1210,7 +1210,7 @@ megasas_display_intel_branding(struct
>megasas_instance *instance)
>  *
>  * This is the main function for initializing firmware.
>  */
>-u32
>+static u32
> megasas_init_adapter_fusion(struct megasas_instance *instance)  {
> 	struct megasas_register_set __iomem *reg_set; @@ -1382,7 +1382,7
>@@ megasas_init_adapter_fusion(struct megasas_instance *instance)
>  * @ext_status :	ext status of cmd returned by FW
>  */
>
>-void
>+static void
> map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
{
>
>@@ -1514,7 +1514,7 @@ megasas_make_sgl_fusion(struct megasas_instance
>*instance,
>  *
>  * Used to set the PD LBA in CDB for FP IOs
>  */
>-void
>+static void
> megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8
>cdb_len,
> 		   struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
> 		   struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
>@@ -1691,7 +1691,7 @@ megasas_set_pd_lba(struct
>MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
>  * Prepares the io_request and chain elements (sg_frame) for IO
>  * The IO can be for PD (Fast Path) or LD
>  */
>-void
>+static void
> megasas_build_ldio_fusion(struct megasas_instance *instance,
> 			  struct scsi_cmnd *scp,
> 			  struct megasas_cmd_fusion *cmd)
>@@ -2056,7 +2056,7 @@ megasas_build_syspd_fusion(struct megasas_instance
>*instance,
>  * Invokes helper functions to prepare request frames
>  * and sets flags appropriate for IO/Non-IO cmd
>  */
>-int
>+static int
> megasas_build_io_fusion(struct megasas_instance *instance,
> 			struct scsi_cmnd *scp,
> 			struct megasas_cmd_fusion *cmd)
>@@ -2144,7 +2144,7 @@ megasas_build_io_fusion(struct megasas_instance
>*instance,
> 	return 0;
> }
>
>-union MEGASAS_REQUEST_DESCRIPTOR_UNION *
>+static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
> megasas_get_request_descriptor(struct megasas_instance *instance, u16
index)
>{
> 	u8 *p;
>@@ -2229,7 +2229,7 @@ megasas_build_and_issue_cmd_fusion(struct
>megasas_instance *instance,
>  * @instance:			Adapter soft state
>  * Completes all commands that is in reply descriptor queue
>  */
>-int
>+static int
> complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)  {
> 	union MPI2_REPLY_DESCRIPTORS_UNION *desc; @@ -2405,7 +2405,7
>@@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
>  *
>  * Tasklet to complete cmds
>  */
>-void
>+static void
> megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)  {
> 	struct megasas_instance *instance =
>@@ -2430,7 +2430,7 @@ megasas_complete_cmd_dpc_fusion(unsigned long
>instance_addr)
> /**
>  * megasas_isr_fusion - isr entry point
>  */
>-irqreturn_t megasas_isr_fusion(int irq, void *devp)
>+static irqreturn_t megasas_isr_fusion(int irq, void *devp)
> {
> 	struct megasas_irq_context *irq_context = devp;
> 	struct megasas_instance *instance = irq_context->instance; @@
-2481,7
>+2481,7 @@ irqreturn_t megasas_isr_fusion(int irq, void *devp)
>  * mfi_cmd:			megasas_cmd pointer
>  *
>  */
>-u8
>+static u8
> build_mpt_mfi_pass_thru(struct megasas_instance *instance,
> 			struct megasas_cmd *mfi_cmd)
> {
>@@ -2541,7 +2541,7 @@ build_mpt_mfi_pass_thru(struct megasas_instance
>*instance,
>  * @cmd:			mfi cmd to build
>  *
>  */
>-union MEGASAS_REQUEST_DESCRIPTOR_UNION *
>+static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
> build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd
*cmd)
>{
> 	union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; @@ -
>2574,7 +2574,7 @@ build_mpt_cmd(struct megasas_instance *instance, struct
>megasas_cmd *cmd)
>  * @cmd:			mfi cmd pointer
>  *
>  */
>-int
>+static int
> megasas_issue_dcmd_fusion(struct megasas_instance *instance,
> 			  struct megasas_cmd *cmd)
> {
>@@ -2748,8 +2748,9 @@ megasas_check_reset_fusion(struct megasas_instance
>*instance,  }
>
> /* This function waits for outstanding commands on fusion to complete */
-int
>megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
>-					int reason, int *convert)
>+static int
>+megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
>+				    int reason, int *convert)
> {
> 	int i, outstanding, retval = 0, hb_seconds_missed = 0;
> 	u32 fw_state;
>@@ -2849,7 +2850,7 @@ void  megasas_reset_reply_desc(struct
>megasas_instance *instance)
>  * megasas_refire_mgmt_cmd :	Re-fire management commands
>  * @instance:				Controller's soft instance
> */
>-void megasas_refire_mgmt_cmd(struct megasas_instance *instance)
>+static void megasas_refire_mgmt_cmd(struct megasas_instance *instance)
> {
> 	int j;
> 	struct megasas_cmd_fusion *cmd_fusion; @@ -3332,7 +3333,8 @@ int
>megasas_reset_target_fusion(struct scsi_cmnd *scmd)  }
>
> /*SRIOV get other instance in cluster if any*/ -struct megasas_instance
>*megasas_get_peer_instance(struct megasas_instance *instance)
>+static struct megasas_instance *
>+megasas_get_peer_instance(struct megasas_instance *instance)
> {
> 	int i;
Acked-by: Sumit Saxena <sumit.saxena@...adcom.com>
 >
>--
>2.7.4

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