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.

2 files changed, 19 insertions, 19 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 33276d1d05d2..d2873b732bb1 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -261,7 +261,7 @@ struct ata_taskfile {
           ((u64) (id)[(n) + 1] << 16) | \
           ((u64) (id)[(n) + 0]) )
 
-static inline int ata_id_current_chs_valid(u16 *id)
+static inline int ata_id_current_chs_valid(const u16 *id)
 {
         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command 
            has not been issued to the device then the values of 
@@ -273,7 +273,7 @@ static inline int ata_id_current_chs_valid(u16 *id)
                 id[56];    /* sectors in current translation */
 }
 
-static inline int atapi_cdb_len(u16 *dev_id)
+static inline int atapi_cdb_len(const u16 *dev_id)
 {
         u16 tmp = dev_id[0] & 0x3;
         switch (tmp) {
@@ -283,7 +283,7 @@ static inline int atapi_cdb_len(u16 *dev_id)
         }
 }
 
-static inline int is_atapi_taskfile(struct ata_taskfile *tf)
+static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
 {
         return (tf->protocol == ATA_PROT_ATAPI) ||
                (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 634b5aa0a615..00a8a5738858 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -202,7 +202,7 @@ struct ata_ioports {
 struct ata_probe_ent {
         struct list_head        node;
         struct device           *dev;
-        struct ata_port_operations      *port_ops;
+        const struct ata_port_operations *port_ops;
         Scsi_Host_Template      *sht;
         struct ata_ioports      port[ATA_MAX_PORTS];
         unsigned int            n_ports;
@@ -225,7 +225,7 @@ struct ata_host_set {
         void __iomem            *mmio_base;
         unsigned int            n_ports;
         void                    *private_data;
-        struct ata_port_operations *ops;
+        const struct ata_port_operations *ops;
         struct ata_port *       ports[0];
 };
 
@@ -294,7 +294,7 @@ struct ata_device {
 
 struct ata_port {
         struct Scsi_Host        *host;  /* our co-allocated scsi host */
-        struct ata_port_operations      *ops;
+        const struct ata_port_operations *ops;
         unsigned long           flags;  /* ATA_FLAG_xxx */
         unsigned int            id;     /* unique id req'd by scsi midlyr */
         unsigned int            port_no; /* unique port #; from zero */
@@ -341,10 +341,10 @@ struct ata_port_operations {
         void (*set_piomode) (struct ata_port *, struct ata_device *);
         void (*set_dmamode) (struct ata_port *, struct ata_device *);
 
-        void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
+        void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
         void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
 
-        void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
+        void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
         u8   (*check_status)(struct ata_port *ap);
         u8   (*check_altstatus)(struct ata_port *ap);
         u8   (*check_err)(struct ata_port *ap);
@@ -385,7 +385,7 @@ struct ata_port_info {
         unsigned long           pio_mask;
         unsigned long           mwdma_mask;
         unsigned long           udma_mask;
-        struct ata_port_operations      *port_ops;
+        const struct ata_port_operations *port_ops;
 };
 
 struct ata_timing {
@@ -413,7 +413,7 @@ extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_i
                              unsigned int n_ports);
 extern void ata_pci_remove_one (struct pci_dev *pdev);
 #endif /* CONFIG_PCI */
-extern int ata_device_add(struct ata_probe_ent *ent);
+extern int ata_device_add(const struct ata_probe_ent *ent);
 extern void ata_host_set_remove(struct ata_host_set *host_set);
 extern int ata_scsi_detect(Scsi_Host_Template *sht);
 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
@@ -426,16 +426,16 @@ extern int ata_ratelimit(void);
 /*
  * Default driver ops implementations
  */
-extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf);
+extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
-extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp);
-extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf);
+extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
+extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
 extern u8 ata_check_status(struct ata_port *ap);
 extern u8 ata_altstatus(struct ata_port *ap);
 extern u8 ata_chk_err(struct ata_port *ap);
-extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf);
+extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
 extern int ata_port_start (struct ata_port *ap);
 extern void ata_port_stop (struct ata_port *ap);
 extern void ata_host_stop (struct ata_host_set *host_set);
@@ -446,8 +446,8 @@ extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
                 unsigned int buflen);
 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
                  unsigned int n_elem);
-extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
-extern void ata_dev_id_string(u16 *id, unsigned char *s,
+extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
+extern void ata_dev_id_string(const u16 *id, unsigned char *s,
                               unsigned int ofs, unsigned int len);
 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
@@ -502,7 +502,7 @@ struct pci_bits {
 extern void ata_pci_host_stop (struct ata_host_set *host_set);
 extern struct ata_probe_ent *
 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
-extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);
+extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
 
 #endif /* CONFIG_PCI */
 
@@ -512,7 +512,7 @@ static inline unsigned int ata_tag_valid(unsigned int tag)
         return (tag < ATA_MAX_QUEUE) ? 1 : 0;
 }
 
-static inline unsigned int ata_dev_present(struct ata_device *dev)
+static inline unsigned int ata_dev_present(const struct ata_device *dev)
 {
         return ((dev->class == ATA_DEV_ATA) ||
                 (dev->class == ATA_DEV_ATAPI));
@@ -711,7 +711,7 @@ static inline unsigned int sata_dev_present(struct ata_port *ap)
         return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
 }
 
-static inline int ata_try_flush_cache(struct ata_device *dev)
+static inline int ata_try_flush_cache(const struct ata_device *dev)
 {
         return ata_id_wcache_enabled(dev->id) ||
                ata_id_has_flush(dev->id) ||