Remove leading underscores from identifiers

In a number of places, dtc and associated tools and test code use
leading _ characters on identifiers to flag them as "internal", an
idiom taken from the Linux kernel.  This is a bad idea in a userspace
program, because identifiers with a leading _ are reserved for the C
library / system.

In some cases, the extra _ served no real purpose, so simply drop it.  In
others move to the end of the identifier, which is a convention we're free
to use for our own purposes.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

checks.c

@@ -53,24 +53,24 @@ struct check {
 	struct check **prereq;
 };
 
-#define CHECK_ENTRY(_nm, _fn, _d, _w, _e, ...)	       \
-	static struct check *_nm##_prereqs[] = { __VA_ARGS__ }; \
-	static struct check _nm = { \
-		.name = #_nm, \
-		.fn = (_fn), \
-		.data = (_d), \
-		.warn = (_w), \
-		.error = (_e), \
+#define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...)	       \
+	static struct check *nm_##_prereqs[] = { __VA_ARGS__ }; \
+	static struct check nm_ = { \
+		.name = #nm_, \
+		.fn = (fn_), \
+		.data = (d_), \
+		.warn = (w_), \
+		.error = (e_), \
 		.status = UNCHECKED, \
-		.num_prereqs = ARRAY_SIZE(_nm##_prereqs), \
-		.prereq = _nm##_prereqs, \
+		.num_prereqs = ARRAY_SIZE(nm_##_prereqs), \
+		.prereq = nm_##_prereqs, \
 	};
-#define WARNING(_nm, _fn, _d, ...) \
-	CHECK_ENTRY(_nm, _fn, _d, true, false, __VA_ARGS__)
-#define ERROR(_nm, _fn, _d, ...) \
-	CHECK_ENTRY(_nm, _fn, _d, false, true, __VA_ARGS__)
-#define CHECK(_nm, _fn, _d, ...) \
-	CHECK_ENTRY(_nm, _fn, _d, false, false, __VA_ARGS__)
+#define WARNING(nm_, fn_, d_, ...) \
+	CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__)
+#define ERROR(nm_, fn_, d_, ...) \
+	CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__)
+#define CHECK(nm_, fn_, d_, ...) \
+	CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__)
 
 static inline void  PRINTF(3, 4) check_msg(struct check *c, struct dt_info *dti,
 					   const char *fmt, ...)

dtc.h

@@ -1,5 +1,5 @@
-#ifndef _DTC_H
-#define _DTC_H
+#ifndef DTC_H
+#define DTC_H
 
 /*
  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
@@ -289,4 +289,4 @@ struct dt_info *dt_from_source(const char *f);
 
 struct dt_info *dt_from_fs(const char *dirname);
 
-#endif /* _DTC_H */
+#endif /* DTC_H */

fdtput.c

@@ -130,7 +130,7 @@ static int encode_value(struct display_info *disp, char **arg, int arg_count,
 
 #define ALIGN(x)		(((x) + (FDT_TAGSIZE) - 1) & ~((FDT_TAGSIZE) - 1))
 
-static char *_realloc_fdt(char *fdt, int delta)
+static char *realloc_fdt(char *fdt, int delta)
 {
 	int new_sz = fdt_totalsize(fdt) + delta;
 	fdt = xrealloc(fdt, new_sz);
@@ -144,7 +144,7 @@ static char *realloc_node(char *fdt, const char *name)
 	/* FDT_BEGIN_NODE, node name in off_struct and FDT_END_NODE */
 	delta = sizeof(struct fdt_node_header) + ALIGN(strlen(name) + 1)
 			+ FDT_TAGSIZE;
-	return _realloc_fdt(fdt, delta);
+	return realloc_fdt(fdt, delta);
 }
 
 static char *realloc_property(char *fdt, int nodeoffset,
@@ -161,7 +161,7 @@ static char *realloc_property(char *fdt, int nodeoffset,
 		/* actual value in off_struct */
 		delta += ALIGN(newlen) - ALIGN(oldlen);
 
-	return _realloc_fdt(fdt, delta);
+	return realloc_fdt(fdt, delta);
 }
 
 static int store_key_value(char **blob, const char *node_name,

srcpos.h

@@ -17,8 +17,8 @@
  *                                                                   USA
  */
 
-#ifndef _SRCPOS_H_
-#define _SRCPOS_H_
+#ifndef SRCPOS_H
+#define SRCPOS_H
 
 #include <stdio.h>
 #include <stdbool.h>
@@ -114,4 +114,4 @@ extern void PRINTF(3, 4) srcpos_error(struct srcpos *pos, const char *prefix,
 
 extern void srcpos_set_line(char *f, int l);
 
-#endif /* _SRCPOS_H_ */
+#endif /* SRCPOS_H */

tests/dumptrees.c

@@ -33,7 +33,7 @@ static struct {
 	void *blob;
 	const char *filename;
 } trees[] = {
-#define TREE(name)	{ &_##name, #name ".dtb" }
+#define TREE(name)	{ &name, #name ".dtb" }
 	TREE(test_tree1),
 	TREE(bad_node_char), TREE(bad_node_format), TREE(bad_prop_char),
 	TREE(ovf_size_strings),

tests/testdata.h

@@ -41,10 +41,10 @@
 #define TEST_CHAR5	'\xff'
 
 #ifndef __ASSEMBLY__
-extern struct fdt_header _test_tree1;
-extern struct fdt_header _truncated_property;
-extern struct fdt_header _bad_node_char;
-extern struct fdt_header _bad_node_format;
-extern struct fdt_header _bad_prop_char;
-extern struct fdt_header _ovf_size_strings;
+extern struct fdt_header test_tree1;
+extern struct fdt_header truncated_property;
+extern struct fdt_header bad_node_char;
+extern struct fdt_header bad_node_format;
+extern struct fdt_header bad_prop_char;
+extern struct fdt_header ovf_size_strings;
 #endif /* ! __ASSEMBLY */

tests/tests.h

@@ -1,5 +1,5 @@
-#ifndef _TESTS_H
-#define _TESTS_H
+#ifndef TESTS_H
+#define TESTS_H
 /*
  * libfdt - Flat Device Tree manipulation
  *	Testcase definitions
@@ -126,4 +126,4 @@ void *open_blob_rw(void *blob);
 
 #include "util.h"
 
-#endif /* _TESTS_H */
+#endif /* TESTS_H */

tests/trees.S

@@ -9,8 +9,7 @@
 
 #define TREE_HDR(tree) \
 	.balign	8		; \
-	.globl	_##tree		; \
-_##tree:	\
+	.globl	tree		; \
 tree:	\
 	FDTLONG(FDT_MAGIC)	; \
 	FDTLONG(tree##_end - tree) ; \
@@ -208,8 +207,7 @@ bad_prop_char_end:
 
 	/* overflow_size_strings */
 	.balign	8
-	.globl	_ovf_size_strings
-_ovf_size_strings:
+	.globl	ovf_size_strings
 ovf_size_strings:
 	FDTLONG(FDT_MAGIC)
 	FDTLONG(ovf_size_strings_end - ovf_size_strings)

tests/truncated_property.c

@@ -30,7 +30,7 @@
 
 int main(int argc, char *argv[])
 {
-	void *fdt = &_truncated_property;
+	void *fdt = &truncated_property;
 	const void *prop;
 	int len;
 

util.h

@@ -1,5 +1,5 @@
-#ifndef _UTIL_H
-#define _UTIL_H
+#ifndef UTIL_H
+#define UTIL_H
 
 #include <stdarg.h>
 #include <stdbool.h>
@@ -263,4 +263,4 @@ void NORETURN util_usage(const char *errmsg, const char *synopsis,
 	case 'V': util_version(); \
 	case '?': usage("unknown option");
 
-#endif /* _UTIL_H */
+#endif /* UTIL_H */