MIPS: Remove no-op/identity casts

Clean up instances of casts to the type that a value already has, since
they are effectively no-ops and only serve to complicate the code.

This is the result of the following semantic patch:

  @identitycast@
  type T;
  T *A;
  @@
  -	(T *)(A)
  +	A

Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/19599/

arch/mips/kernel/relocate.c

@@ -146,7 +146,7 @@ int __init do_relocations(void *kbase_old, void *kbase_new, long offset)
 			break;
 
 		type = (*r >> 24) & 0xff;
-		loc_orig = (void *)(kbase_old + ((*r & 0x00ffffff) << 2));
+		loc_orig = kbase_old + ((*r & 0x00ffffff) << 2);
 		loc_new = RELOCATED(loc_orig);
 
 		if (reloc_handlers_rel[type] == NULL) {

arch/mips/kernel/traps.c

@@ -348,7 +348,7 @@ static void __show_regs(const struct pt_regs *regs)
  */
 void show_regs(struct pt_regs *regs)
 {
-	__show_regs((struct pt_regs *)regs);
+	__show_regs(regs);
 	dump_stack();
 }
 

arch/mips/loongson64/loongson-3/smp.c

@@ -349,7 +349,7 @@ static void loongson3_smp_finish(void)
 	write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ);
 	local_irq_enable();
 	loongson3_ipi_write64(0,
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x0);
 	pr_info("CPU#%d finished, CP0_ST=%x\n",
 			smp_processor_id(), read_c0_status());
 }
@@ -416,13 +416,13 @@ static int loongson3_boot_secondary(int cpu, struct task_struct *idle)
 			cpu, startargs[0], startargs[1], startargs[2]);
 
 	loongson3_ipi_write64(startargs[3],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x18));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x18);
 	loongson3_ipi_write64(startargs[2],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x10));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x10);
 	loongson3_ipi_write64(startargs[1],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x8));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x8);
 	loongson3_ipi_write64(startargs[0],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x0);
 	return 0;
 }
 

arch/mips/pmcs-msp71xx/msp_usb.c

@@ -133,13 +133,13 @@ static int __init msp_usb_setup(void)
 	 * "D" for device-mode.	 If it works for Ethernet, why not USB...
 	 *  -- hammtrev, 2007/03/22
 	 */
-	snprintf((char *)&envstr[0], sizeof(envstr), "usbmode");
+	snprintf(&envstr[0], sizeof(envstr), "usbmode");
 
 	/* set default host mode */
 	val = 1;
 
 	/* get environment string */
-	strp = prom_getenv((char *)&envstr[0]);
+	strp = prom_getenv(&envstr[0]);
 	if (strp) {
 		/* compare string */
 		if (!strcmp(strp, "device"))

arch/mips/sgi-ip22/ip28-berr.c

@@ -464,7 +464,7 @@ void ip22_be_interrupt(int irq)
 		die_if_kernel("Oops", regs);
 		force_sig(SIGBUS, current);
 	} else if (debug_be_interrupt)
-		show_regs((struct pt_regs *)regs);
+		show_regs(regs);
 }
 
 static int ip28_be_handler(struct pt_regs *regs, int is_fixup)