MIPS: Declare various variables & functions static

We currently have various variables & functions which are only used
within a single translation unit, but which we don't declare static.
This causes various sparse warnings of the form:

  arch/mips/kernel/mips-r2-to-r6-emul.c:49:1: warning: symbol
    'mipsr2emustats' was not declared. Should it be static?

  arch/mips/kernel/unaligned.c:1381:11: warning: symbol 'reg16to32st'
    was not declared. Should it be static?

  arch/mips/mm/mmap.c:146:15: warning: symbol 'arch_mmap_rnd' was not
    declared. Should it be static?

Fix these & others by declaring various affected variables & functions
static, avoiding the sparse warnings & redundant symbols.

[ralf@linux-mips.org: Add Marcin's build fix.]
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17176/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/cpu-probe.c

@@ -326,7 +326,7 @@ static int __init fpu_disable(char *s)
 
 __setup("nofpu", fpu_disable);
 
-int mips_dsp_disabled;
+static int mips_dsp_disabled;
 
 static int __init dsp_disable(char *s)
 {

arch/mips/kernel/mips-r2-to-r6-emul.c

@@ -46,9 +46,11 @@
 #define LL	"ll "
 #define SC	"sc "
 
-DEFINE_PER_CPU(struct mips_r2_emulator_stats, mipsr2emustats);
-DEFINE_PER_CPU(struct mips_r2_emulator_stats, mipsr2bdemustats);
-DEFINE_PER_CPU(struct mips_r2br_emulator_stats, mipsr2bremustats);
+#ifdef CONFIG_DEBUG_FS
+static DEFINE_PER_CPU(struct mips_r2_emulator_stats, mipsr2emustats);
+static DEFINE_PER_CPU(struct mips_r2_emulator_stats, mipsr2bdemustats);
+static DEFINE_PER_CPU(struct mips_r2br_emulator_stats, mipsr2bremustats);
+#endif
 
 extern const unsigned int fpucondbit[8];
 

arch/mips/kernel/pm-cps.c

@@ -49,7 +49,7 @@ static DEFINE_PER_CPU_READ_MOSTLY(cps_nc_entry_fn[CPS_PM_STATE_COUNT],
 				  nc_asm_enter);
 
 /* Bitmap indicating which states are supported by the system */
-DECLARE_BITMAP(state_support, CPS_PM_STATE_COUNT);
+static DECLARE_BITMAP(state_support, CPS_PM_STATE_COUNT);
 
 /*
  * Indicates the number of coupled VPEs ready to operate in a non-coherent

arch/mips/kernel/unaligned.c

@@ -1378,7 +1378,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
 const int reg16to32[] = { 16, 17, 2, 3, 4, 5, 6, 7 };
 
 /* Recode table from 16-bit STORE register notation to 32-bit GPR. */
-const int reg16to32st[] = { 0, 17, 2, 3, 4, 5, 6, 7 };
+static const int reg16to32st[] = { 0, 17, 2, 3, 4, 5, 6, 7 };
 
 static void emulate_load_store_microMIPS(struct pt_regs *regs,
 					 void __user *addr)

arch/mips/mm/dma-default.c

@@ -373,12 +373,12 @@ static void mips_dma_sync_sg_for_device(struct device *dev,
 	}
 }
 
-int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+static int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
 	return 0;
 }
 
-int mips_dma_supported(struct device *dev, u64 mask)
+static int mips_dma_supported(struct device *dev, u64 mask)
 {
 	return plat_dma_supported(dev, mask);
 }