From 057ace5e79da9ebf2aa82833cfea825533ac06fb Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Sat, 22 Oct 2005 14:27:05 -0400 Subject: libata: const-ification bombing run Enforce access rules where appropriate. If the compiler is smart enough, this may buy us an optimization or two as a side effect. --- drivers/scsi/libata-core.c | 68 +++++++++++++++++++++++----------------------- 1 file changed, 34 insertions(+), 34 deletions(-) (limited to 'drivers/scsi/libata-core.c') diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 9269fd9b814f..d55f12dacfcb 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -67,9 +67,9 @@ static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev); static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev); static void ata_set_mode(struct ata_port *ap); static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); -static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift); +static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift); static int fgb(u32 bitmap); -static int ata_choose_xfer_mode(struct ata_port *ap, +static int ata_choose_xfer_mode(const struct ata_port *ap, u8 *xfer_mode_out, unsigned int *xfer_shift_out); static void __ata_qc_complete(struct ata_queued_cmd *qc); @@ -97,7 +97,7 @@ MODULE_VERSION(DRV_VERSION); * Inherited from caller. */ -static void ata_tf_load_pio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_tf_load_pio(struct ata_port *ap, const struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; @@ -155,7 +155,7 @@ static void ata_tf_load_pio(struct ata_port *ap, struct ata_taskfile *tf) * Inherited from caller. */ -static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; @@ -224,7 +224,7 @@ static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) * LOCKING: * Inherited from caller. */ -void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) +void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) ata_tf_load_mmio(ap, tf); @@ -244,7 +244,7 @@ void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) * spin_lock_irqsave(host_set lock) */ -static void ata_exec_command_pio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile *tf) { DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); @@ -265,7 +265,7 @@ static void ata_exec_command_pio(struct ata_port *ap, struct ata_taskfile *tf) * spin_lock_irqsave(host_set lock) */ -static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); @@ -285,7 +285,7 @@ static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) * LOCKING: * spin_lock_irqsave(host_set lock) */ -void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) +void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) ata_exec_command_mmio(ap, tf); @@ -305,7 +305,7 @@ void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) * Obtains host_set lock. */ -static inline void ata_exec(struct ata_port *ap, struct ata_taskfile *tf) +static inline void ata_exec(struct ata_port *ap, const struct ata_taskfile *tf) { unsigned long flags; @@ -328,7 +328,7 @@ static inline void ata_exec(struct ata_port *ap, struct ata_taskfile *tf) * Obtains host_set lock. */ -static void ata_tf_to_host(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_tf_to_host(struct ata_port *ap, const struct ata_taskfile *tf) { ap->ops->tf_load(ap, tf); @@ -348,7 +348,7 @@ static void ata_tf_to_host(struct ata_port *ap, struct ata_taskfile *tf) * spin_lock_irqsave(host_set lock) */ -void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf) +void ata_tf_to_host_nolock(struct ata_port *ap, const struct ata_taskfile *tf) { ap->ops->tf_load(ap, tf); ap->ops->exec_command(ap, tf); @@ -558,7 +558,7 @@ u8 ata_chk_err(struct ata_port *ap) * Inherited from caller. */ -void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp) +void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) { fis[0] = 0x27; /* Register - Host to Device FIS */ fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, @@ -599,7 +599,7 @@ void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp) * Inherited from caller. */ -void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf) +void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) { tf->command = fis[2]; /* status */ tf->feature = fis[3]; /* error */ @@ -845,7 +845,7 @@ static unsigned int ata_devchk(struct ata_port *ap, * the event of failure. */ -unsigned int ata_dev_classify(struct ata_taskfile *tf) +unsigned int ata_dev_classify(const struct ata_taskfile *tf) { /* Apple's open source Darwin code hints that some devices only * put a proper signature into the LBA mid/high registers, @@ -937,7 +937,7 @@ static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device) * caller. */ -void ata_dev_id_string(u16 *id, unsigned char *s, +void ata_dev_id_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len) { unsigned int c; @@ -1054,7 +1054,7 @@ void ata_dev_select(struct ata_port *ap, unsigned int device, * caller. */ -static inline void ata_dump_id(struct ata_device *dev) +static inline void ata_dump_id(const struct ata_device *dev) { DPRINTK("49==0x%04x " "53==0x%04x " @@ -1089,7 +1089,7 @@ static inline void ata_dump_id(struct ata_device *dev) * FIXME: pre IDE drive timing (do we care ?). */ -static unsigned int ata_pio_modes(struct ata_device *adev) +static unsigned int ata_pio_modes(const struct ata_device *adev) { u16 modes; @@ -1352,7 +1352,7 @@ err_out: } -static inline u8 ata_dev_knobble(struct ata_port *ap) +static inline u8 ata_dev_knobble(const struct ata_port *ap) { return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id))); } @@ -1684,7 +1684,7 @@ int ata_timing_compute(struct ata_device *adev, unsigned short speed, return 0; } -static struct { +static const struct { unsigned int shift; u8 base; } xfer_mode_classes[] = { @@ -2093,7 +2093,8 @@ err_out: DPRINTK("EXIT\n"); } -static void ata_pr_blacklisted(struct ata_port *ap, struct ata_device *dev) +static void ata_pr_blacklisted(const struct ata_port *ap, + const struct ata_device *dev) { printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n", ap->id, dev->devno); @@ -2131,7 +2132,7 @@ static const char * ata_dma_blacklist [] = { "_NEC DV5800A", }; -static int ata_dma_blacklisted(struct ata_port *ap, struct ata_device *dev) +static int ata_dma_blacklisted(const struct ata_device *dev) { unsigned char model_num[40]; char *s; @@ -2156,9 +2157,9 @@ static int ata_dma_blacklisted(struct ata_port *ap, struct ata_device *dev) return 0; } -static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) +static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift) { - struct ata_device *master, *slave; + const struct ata_device *master, *slave; unsigned int mask; master = &ap->device[0]; @@ -2170,14 +2171,14 @@ static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) mask = ap->udma_mask; if (ata_dev_present(master)) { mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff); - if (ata_dma_blacklisted(ap, master)) { + if (ata_dma_blacklisted(master)) { mask = 0; ata_pr_blacklisted(ap, master); } } if (ata_dev_present(slave)) { mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff); - if (ata_dma_blacklisted(ap, slave)) { + if (ata_dma_blacklisted(slave)) { mask = 0; ata_pr_blacklisted(ap, slave); } @@ -2187,14 +2188,14 @@ static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) mask = ap->mwdma_mask; if (ata_dev_present(master)) { mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07); - if (ata_dma_blacklisted(ap, master)) { + if (ata_dma_blacklisted(master)) { mask = 0; ata_pr_blacklisted(ap, master); } } if (ata_dev_present(slave)) { mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07); - if (ata_dma_blacklisted(ap, slave)) { + if (ata_dma_blacklisted(slave)) { mask = 0; ata_pr_blacklisted(ap, slave); } @@ -2258,7 +2259,7 @@ static int fgb(u32 bitmap) * Zero on success, negative on error. */ -static int ata_choose_xfer_mode(struct ata_port *ap, +static int ata_choose_xfer_mode(const struct ata_port *ap, u8 *xfer_mode_out, unsigned int *xfer_shift_out) { @@ -4144,7 +4145,7 @@ static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, struct ata_host_set *host_set, - struct ata_probe_ent *ent, unsigned int port_no) + const struct ata_probe_ent *ent, unsigned int port_no) { unsigned int i; @@ -4203,7 +4204,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, * */ -static struct ata_port * ata_host_add(struct ata_probe_ent *ent, +static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, struct ata_host_set *host_set, unsigned int port_no) { @@ -4251,7 +4252,7 @@ err_out: * */ -int ata_device_add(struct ata_probe_ent *ent) +int ata_device_add(const struct ata_probe_ent *ent) { unsigned int count = 0, i; struct device *dev = ent->dev; @@ -4470,7 +4471,7 @@ void ata_std_ports(struct ata_ioports *ioaddr) } static struct ata_probe_ent * -ata_probe_ent_alloc(struct device *dev, struct ata_port_info *port) +ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) { struct ata_probe_ent *probe_ent; @@ -4570,7 +4571,6 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, stru if (!probe_ent) return NULL; - probe_ent->legacy_mode = 1; probe_ent->n_ports = 1; probe_ent->hard_port_no = port_num; @@ -4783,7 +4783,7 @@ void ata_pci_remove_one (struct pci_dev *pdev) } /* move to PCI subsystem */ -int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits) +int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) { unsigned long tmp = 0; 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