[POWERPC] Fix sparse warnings in xmon.c

warning: Using plain integer as NULL pointer
warning: Using plain integer as NULL pointer
warning: symbol 'excprint' was not declared. Should it be static?
warning: symbol 'prregs' was not declared. Should it be static?
warning: symbol 'cacheflush' was not declared. Should it be static?
warning: symbol 'read_spr' was not declared. Should it be static?
warning: symbol 'write_spr' was not declared. Should it be static?
warning: symbol 'super_regs' was not declared. Should it be static?
warning: symbol 'mread' was not declared. Should it be static?
warning: symbol 'mwrite' was not declared. Should it be static?
warning: symbol 'byterev' was not declared. Should it be static?
warning: symbol 'memex' was not declared. Should it be static?
warning: symbol 'bsesc' was not declared. Should it be static?
warning: symbol 'dump' was not declared. Should it be static?
warning: symbol 'prdump' was not declared. Should it be static?
warning: symbol 'generic_inst_dump' was not declared. Should it be static?
warning: symbol 'ppc_inst_dump' was not declared. Should it be static?
warning: symbol 'memops' was not declared. Should it be static?
warning: symbol 'memdiffs' was not declared. Should it be static?
warning: symbol 'memlocate' was not declared. Should it be static?
warning: symbol 'memzcan' was not declared. Should it be static?
warning: symbol 'proccall' was not declared. Should it be static?
warning: symbol 'scannl' was not declared. Should it be static?
warning: symbol 'hexdigit' was not declared. Should it be static?
warning: symbol 'flush_input' was not declared. Should it be static?
warning: symbol 'inchar' was not declared. Should it be static?
warning: symbol 'take_input' was not declared. Should it be static?
warning: symbol 'xmon_init' was not declared. Should it be static?
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/xmon/xmon.c

@@ -154,7 +154,7 @@ static int do_spu_cmd(void);
 static void dump_tlb_44x(void);
 #endif
 
-int xmon_no_auto_backtrace;
+static int xmon_no_auto_backtrace;
 
 extern void xmon_enter(void);
 extern void xmon_leave(void);
@@ -593,7 +593,7 @@ static int xmon_iabr_match(struct pt_regs *regs)
 {
 	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
 		return 0;
-	if (iabr == 0)
+	if (iabr == NULL)
 		return 0;
 	xmon_core(regs, 0);
 	return 1;
@@ -1142,7 +1142,7 @@ bpt_cmds(void)
 		} else {
 			/* assume a breakpoint address */
 			bp = at_breakpoint(a);
-			if (bp == 0) {
+			if (bp == NULL) {
 				printf("No breakpoint at %x\n", a);
 				break;
 			}
@@ -1370,7 +1370,7 @@ static void print_bug_trap(struct pt_regs *regs)
 #endif
 }
 
-void excprint(struct pt_regs *fp)
+static void excprint(struct pt_regs *fp)
 {
 	unsigned long trap;
 
@@ -1408,7 +1408,7 @@ void excprint(struct pt_regs *fp)
 		print_bug_trap(fp);
 }
 
-void prregs(struct pt_regs *fp)
+static void prregs(struct pt_regs *fp)
 {
 	int n, trap;
 	unsigned long base;
@@ -1463,7 +1463,7 @@ void prregs(struct pt_regs *fp)
 		printf("dar = "REG"   dsisr = %.8lx\n", fp->dar, fp->dsisr);
 }
 
-void cacheflush(void)
+static void cacheflush(void)
 {
 	int cmd;
 	unsigned long nflush;
@@ -1495,7 +1495,7 @@ void cacheflush(void)
 	catch_memory_errors = 0;
 }
 
-unsigned long
+static unsigned long
 read_spr(int n)
 {
 	unsigned int instrs[2];
@@ -1533,7 +1533,7 @@ read_spr(int n)
 	return ret;
 }
 
-void
+static void
 write_spr(int n, unsigned long val)
 {
 	unsigned int instrs[2];
@@ -1571,7 +1571,7 @@ static unsigned long regno;
 extern char exc_prolog;
 extern char dec_exc;
 
-void super_regs(void)
+static void super_regs(void)
 {
 	int cmd;
 	unsigned long val;
@@ -1629,7 +1629,7 @@ void super_regs(void)
 /*
  * Stuff for reading and writing memory safely
  */
-int
+static int
 mread(unsigned long adrs, void *buf, int size)
 {
 	volatile int n;
@@ -1666,7 +1666,7 @@ mread(unsigned long adrs, void *buf, int size)
 	return n;
 }
 
-int
+static int
 mwrite(unsigned long adrs, void *buf, int size)
 {
 	volatile int n;
@@ -1731,7 +1731,7 @@ static int handle_fault(struct pt_regs *regs)
 
 #define SWAP(a, b, t)	((t) = (a), (a) = (b), (b) = (t))
 
-void
+static void
 byterev(unsigned char *val, int size)
 {
 	int t;
@@ -1793,7 +1793,7 @@ static char *memex_subcmd_help_string =
     "  x        exit this mode\n"
     "";
 
-void
+static void
 memex(void)
 {
 	int cmd, inc, i, nslash;
@@ -1944,7 +1944,7 @@ memex(void)
 	}
 }
 
-int
+static int
 bsesc(void)
 {
 	int c;
@@ -1984,7 +1984,7 @@ static void xmon_rawdump (unsigned long adrs, long ndump)
 #define isxdigit(c)	(('0' <= (c) && (c) <= '9') \
 			 || ('a' <= (c) && (c) <= 'f') \
 			 || ('A' <= (c) && (c) <= 'F'))
-void
+static void
 dump(void)
 {
 	int c;
@@ -2022,7 +2022,7 @@ dump(void)
 	}
 }
 
-void
+static void
 prdump(unsigned long adrs, long ndump)
 {
 	long n, m, c, r, nr;
@@ -2066,7 +2066,7 @@ prdump(unsigned long adrs, long ndump)
 
 typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr);
 
-int
+static int
 generic_inst_dump(unsigned long adr, long count, int praddr,
 			instruction_dump_func dump_func)
 {
@@ -2104,7 +2104,7 @@ generic_inst_dump(unsigned long adr, long count, int praddr,
 	return adr - first_adr;
 }
 
-int
+static int
 ppc_inst_dump(unsigned long adr, long count, int praddr)
 {
 	return generic_inst_dump(adr, count, praddr, print_insn_powerpc);
@@ -2126,7 +2126,7 @@ static unsigned long mval;		/* byte value to set memory to */
 static unsigned long mcount;		/* # bytes to affect */
 static unsigned long mdiffs;		/* max # differences to print */
 
-void
+static void
 memops(int cmd)
 {
 	scanhex((void *)&mdest);
@@ -2152,7 +2152,7 @@ memops(int cmd)
 	}
 }
 
-void
+static void
 memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr)
 {
 	unsigned n, prt;
@@ -2170,7 +2170,7 @@ memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr)
 static unsigned mend;
 static unsigned mask;
 
-void
+static void
 memlocate(void)
 {
 	unsigned a, n;
@@ -2203,7 +2203,7 @@ memlocate(void)
 static unsigned long mskip = 0x1000;
 static unsigned long mlim = 0xffffffff;
 
-void
+static void
 memzcan(void)
 {
 	unsigned char v;
@@ -2230,7 +2230,7 @@ memzcan(void)
 		printf("%.8x\n", a - mskip);
 }
 
-void proccall(void)
+static void proccall(void)
 {
 	unsigned long args[8];
 	unsigned long ret;
@@ -2388,7 +2388,7 @@ scanhex(unsigned long *vp)
 	return 1;
 }
 
-void
+static void
 scannl(void)
 {
 	int c;
@@ -2399,7 +2399,7 @@ scannl(void)
 		c = inchar();
 }
 
-int hexdigit(int c)
+static int hexdigit(int c)
 {
 	if( '0' <= c && c <= '9' )
 		return c - '0';
@@ -2430,13 +2430,13 @@ getstring(char *s, int size)
 static char line[256];
 static char *lineptr;
 
-void
+static void
 flush_input(void)
 {
 	lineptr = NULL;
 }
 
-int
+static int
 inchar(void)
 {
 	if (lineptr == NULL || *lineptr == 0) {
@@ -2449,7 +2449,7 @@ inchar(void)
 	return *lineptr++;
 }
 
-void
+static void
 take_input(char *str)
 {
 	lineptr = str;
@@ -2618,7 +2618,8 @@ static void dump_tlb_44x(void)
 	}
 }
 #endif /* CONFIG_44x */
-void xmon_init(int enable)
+
+static void xmon_init(int enable)
 {
 #ifdef CONFIG_PPC_ISERIES
 	if (firmware_has_feature(FW_FEATURE_ISERIES))