[PATCH 06/27] modpost: use bool type where appropriate

[Masahiro Yamada <masahiroy@kernel.org>]

Use 'bool' to clarify that the valid value is true or false.

Here is a small note for the conversion.

Strictly speaking, module::gpl_compatible was not boolean because
new_module() initialized it to -1. Maybe, -1 was used to represent the
license is 'unknown', but it is not useful.

Since commit 1d6cd3929360 ("modpost: turn missing MODULE_LICENSE() into
error"), unknown module license is not allowed anyway.

I changed the initializer "= -1" to "= true". This has no functional
change.

The current code:

    if (!mod->gpl_compatible)
            check_for_gpl_usage(exp->export, basename, exp->name);

... only checks whether gpl_compabilt is zero or not:

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 scripts/mod/modpost.c | 60 +++++++++++++++++++++----------------------
 scripts/mod/modpost.h | 10 ++++----
 2 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index f9cbb6b6b7a5..52dd07a36379 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -23,20 +23,20 @@
 #include "../../include/linux/license.h"
 
 /* Are we using CONFIG_MODVERSIONS? */
-static int modversions;
+static bool modversions;
 /* Is CONFIG_MODULE_SRCVERSION_ALL set? */
-static int all_versions;
+static bool all_versions;
 /* If we are modposting external module set to 1 */
-static int external_module;
+static bool external_module;
 /* Only warn about unresolved symbols */
-static int warn_unresolved;
+static bool warn_unresolved;
 /* How a symbol is exported */
 static int sec_mismatch_count;
-static int sec_mismatch_warn_only = true;
+static bool sec_mismatch_warn_only = true;
 /* ignore missing files */
-static int ignore_missing_files;
+static bool ignore_missing_files;
 /* If set to 1, only warn (instead of error) about missing ns imports */
-static int allow_missing_ns_imports;
+static bool allow_missing_ns_imports;
 
 static bool error_occurred;
 
@@ -187,7 +187,7 @@ static struct module *new_module(const char *modname)
 	/* add to list */
 	strcpy(mod->name, modname);
 	mod->is_vmlinux = (strcmp(modname, "vmlinux") == 0);
-	mod->gpl_compatible = -1;
+	mod->gpl_compatible = true;
 	mod->next = modules;
 	modules = mod;
 
@@ -203,10 +203,10 @@ struct symbol {
 	struct symbol *next;
 	struct module *module;
 	unsigned int crc;
-	int crc_valid;
+	bool crc_valid;
 	char *namespace;
-	unsigned int weak:1;
-	unsigned int is_static:1;  /* 1 if symbol is not global */
+	bool weak;
+	bool is_static;		/* true if symbol is not global */
 	enum export  export;       /* Type of export */
 	char name[];
 };
@@ -230,7 +230,7 @@ static inline unsigned int tdb_hash(const char *name)
  * Allocate a new symbols for use in the hash of exported symbols or
  * the list of unresolved symbols per module
  **/
-static struct symbol *alloc_symbol(const char *name, unsigned int weak,
+static struct symbol *alloc_symbol(const char *name, bool weak,
 				   struct symbol *next)
 {
 	struct symbol *s = NOFAIL(malloc(sizeof(*s) + strlen(name) + 1));
@@ -239,7 +239,7 @@ static struct symbol *alloc_symbol(const char *name, unsigned int weak,
 	strcpy(s->name, name);
 	s->weak = weak;
 	s->next = next;
-	s->is_static = 1;
+	s->is_static = true;
 	return s;
 }
 
@@ -250,7 +250,7 @@ static struct symbol *new_symbol(const char *name, struct module *module,
 	unsigned int hash;
 
 	hash = tdb_hash(name) % SYMBOL_HASH_SIZE;
-	symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]);
+	symbolhash[hash] = alloc_symbol(name, false, symbolhash[hash]);
 
 	return symbolhash[hash];
 }
@@ -419,7 +419,7 @@ static void sym_set_crc(const char *name, unsigned int crc)
 		return;
 
 	s->crc = crc;
-	s->crc_valid = 1;
+	s->crc_valid = true;
 }
 
 static void *grab_file(const char *filename, size_t *size)
@@ -716,9 +716,9 @@ static void handle_symbol(struct module *mod, struct elf_info *info,
 			sym_add_exported(name, mod, export);
 		}
 		if (strcmp(symname, "init_module") == 0)
-			mod->has_init = 1;
+			mod->has_init = true;
 		if (strcmp(symname, "cleanup_module") == 0)
-			mod->has_cleanup = 1;
+			mod->has_cleanup = true;
 		break;
 	}
 }
@@ -2008,9 +2008,9 @@ static void read_symbols(const char *modname)
 			error("missing MODULE_LICENSE() in %s\n", modname);
 		while (license) {
 			if (license_is_gpl_compatible(license))
-				mod->gpl_compatible = 1;
+				mod->gpl_compatible = true;
 			else {
-				mod->gpl_compatible = 0;
+				mod->gpl_compatible = false;
 				break;
 			}
 			license = get_next_modinfo(&info, "license", license);
@@ -2053,7 +2053,7 @@ static void read_symbols(const char *modname)
 						       sym->st_name));
 
 			if (s)
-				s->is_static = 0;
+				s->is_static = false;
 		}
 	}
 
@@ -2073,7 +2073,7 @@ static void read_symbols(const char *modname)
 	 * the automatic versioning doesn't pick it up, but it's really
 	 * important anyhow */
 	if (modversions)
-		mod->unres = alloc_symbol("module_layout", 0, mod->unres);
+		mod->unres = alloc_symbol("module_layout", false, mod->unres);
 }
 
 static void read_symbols_from_files(const char *filename)
@@ -2305,7 +2305,7 @@ static void add_depends(struct buffer *b, struct module *mod)
 		if (s->module->seen)
 			continue;
 
-		s->module->seen = 1;
+		s->module->seen = true;
 		p = strrchr(s->module->name, '/');
 		if (p)
 			p++;
@@ -2422,10 +2422,10 @@ static void read_dump(const char *fname)
 		mod = find_module(modname);
 		if (!mod) {
 			mod = new_module(modname);
-			mod->from_dump = 1;
+			mod->from_dump = true;
 		}
 		s = sym_add_exported(symname, mod, export_no(export));
-		s->is_static = 0;
+		s->is_static = false;
 		sym_set_crc(symname, crc);
 		sym_update_namespace(symname, namespace);
 	}
@@ -2503,7 +2503,7 @@ int main(int argc, char **argv)
 	while ((opt = getopt(argc, argv, "ei:mnT:o:awENd:")) != -1) {
 		switch (opt) {
 		case 'e':
-			external_module = 1;
+			external_module = true;
 			break;
 		case 'i':
 			*dump_read_iter =
@@ -2512,28 +2512,28 @@ int main(int argc, char **argv)
 			dump_read_iter = &(*dump_read_iter)->next;
 			break;
 		case 'm':
-			modversions = 1;
+			modversions = true;
 			break;
 		case 'n':
-			ignore_missing_files = 1;
+			ignore_missing_files = true;
 			break;
 		case 'o':
 			dump_write = optarg;
 			break;
 		case 'a':
-			all_versions = 1;
+			all_versions = true;
 			break;
 		case 'T':
 			files_source = optarg;
 			break;
 		case 'w':
-			warn_unresolved = 1;
+			warn_unresolved = true;
 			break;
 		case 'E':
 			sec_mismatch_warn_only = false;
 			break;
 		case 'N':
-			allow_missing_ns_imports = 1;
+			allow_missing_ns_imports = true;
 			break;
 		case 'd':
 			missing_namespace_deps = optarg;
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index a85dcec3669a..4085bf5b33aa 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -1,4 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
@@ -116,11 +117,10 @@ struct module {
 	struct module *next;
 	int gpl_compatible;
 	struct symbol *unres;
-	int from_dump;  /* 1 if module was loaded from *.symvers */
-	int is_vmlinux;
-	int seen;
-	int has_init;
-	int has_cleanup;
+	bool from_dump;		/* true if module was loaded from *.symvers */
+	bool is_vmlinux;
+	bool seen;
+	bool has_init, has_cleanup;
 	struct buffer dev_table_buf;
 	char	     srcversion[25];
 	// Missing namespace dependencies
-- 
2.32.0