From 127102aea2ea9ec4e9ca233e2b1a75c8d3b058c4 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 7 Apr 2008 22:47:21 +0900 Subject: libata: make SFF support optional Now that SFF support is completely separated out from the core layer, it can be made optional. Add CONFIG_ATA_SFF and let SFF drivers depend on it. If CONFIG_ATA_SFF isn't set, all codes in libata-sff.c and data structures for SFF support are disabled. This saves good number of bytes for small systems. Signed-off-by: Tejun Heo --- include/linux/libata.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux/libata.h') diff --git a/include/linux/libata.h b/include/linux/libata.h index 037db1883ba..db77b90003f 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -445,6 +445,7 @@ enum link_pm { }; extern struct class_device_attribute class_device_attr_link_power_management_policy; +#ifdef CONFIG_ATA_SFF struct ata_ioports { void __iomem *cmd_addr; void __iomem *data_addr; @@ -462,6 +463,7 @@ struct ata_ioports { void __iomem *bmdma_addr; void __iomem *scr_addr; }; +#endif /* CONFIG_ATA_SFF */ struct ata_host { spinlock_t lock; @@ -648,7 +650,9 @@ struct ata_port { struct ata_prd *prd; /* our SG list */ dma_addr_t prd_dma; /* and its DMA mapping */ +#ifdef CONFIG_ATA_SFF struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ +#endif /* CONFIG_ATA_SFF */ u8 ctl; /* cache of ATA control register */ u8 last_ctl; /* Cache last written value */ @@ -760,6 +764,7 @@ struct ata_port_operations { void (*port_stop)(struct ata_port *ap); void (*host_stop)(struct ata_host *host); +#ifdef CONFIG_ATA_SFF /* * SFF / taskfile oriented ops */ @@ -779,6 +784,7 @@ struct ata_port_operations { void (*bmdma_start)(struct ata_queued_cmd *qc); void (*bmdma_stop)(struct ata_queued_cmd *qc); u8 (*bmdma_status)(struct ata_port *ap); +#endif /* CONFIG_ATA_SFF */ /* * Obsolete @@ -1349,6 +1355,8 @@ static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) /************************************************************************** * SFF - drivers/ata/libata-sff.c */ +#ifdef CONFIG_ATA_SFF + extern const struct ata_port_operations ata_sff_port_ops; extern const struct ata_port_operations ata_bmdma_port_ops; @@ -1489,5 +1497,6 @@ static inline u8 ata_wait_idle(struct ata_port *ap) return status; } +#endif /* CONFIG_ATA_SFF */ #endif /* __LINUX_LIBATA_H__ */ -- cgit v1.2.3