linux-kernel - [PATCH] kconfig: remove SYMBOL

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Message-Id: <20240422161054.2867285-1-masahiroy@kernel.org>
Date: Tue, 23 Apr 2024 01:10:54 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: linux-kbuild@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>
Subject: [PATCH] kconfig: remove SYMBOL_CHOICE flag

All symbols except choices have a name.

Previously, choices were allowed to have a name, but commit c83f020973bc
("kconfig: remove named choice support") eliminated that possibility.

Now, it is easy to distinguish choices from normal symbols; if the name
is NULL, it is a choice.

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

 scripts/kconfig/confdata.c | 2 +-
 scripts/kconfig/expr.h     | 4 +---
 scripts/kconfig/gconf.c    | 2 --
 scripts/kconfig/lkc.h      | 3 ++-
 scripts/kconfig/parser.y   | 2 +-
 scripts/kconfig/symbol.c   | 2 +-
 6 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index ce0ef417b71b..a86e71bab5fa 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -888,7 +888,7 @@ int conf_write(const char *name)
 				     "# %s\n"
 				     "#\n", str);
 			need_newline = false;
-		} else if (!(sym->flags & SYMBOL_CHOICE) &&
+		} else if (!sym_is_choice(sym) &&
 			   !(sym->flags & SYMBOL_WRITTEN)) {
 			sym_calc_value(sym);
 			if (!(sym->flags & SYMBOL_WRITE))
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 0158f5eac454..68b3dd65cb08 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -72,8 +72,7 @@ enum {
 /*
  * Represents a configuration symbol.
  *
- * Choices are represented as a special kind of symbol and have the
- * SYMBOL_CHOICE bit set in 'flags'.
+ * Choices are represented as a special kind of symbol with null name.
  */
 struct symbol {
 	/* link node for the hash table */
@@ -131,7 +130,6 @@ struct symbol {
 
 #define SYMBOL_CONST      0x0001  /* symbol is const */
 #define SYMBOL_CHECK      0x0008  /* used during dependency checking */
-#define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
 #define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
 #define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
 #define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
diff --git a/scripts/kconfig/gconf.c b/scripts/kconfig/gconf.c
index 9709aca3a30f..74f193272a00 100644
--- a/scripts/kconfig/gconf.c
+++ b/scripts/kconfig/gconf.c
@@ -83,8 +83,6 @@ static const char *dbg_sym_flags(int val)
 		strcat(buf, "const/");
 	if (val & SYMBOL_CHECK)
 		strcat(buf, "check/");
-	if (val & SYMBOL_CHOICE)
-		strcat(buf, "choice/");
 	if (val & SYMBOL_CHOICEVAL)
 		strcat(buf, "choiceval/");
 	if (val & SYMBOL_VALID)
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index cfb7e9ac41a3..5e27432e4939 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -129,7 +129,8 @@ static inline struct symbol *sym_get_choice_value(struct symbol *sym)
 
 static inline bool sym_is_choice(struct symbol *sym)
 {
-	return sym->flags & SYMBOL_CHOICE ? true : false;
+	/* A choice is a symbol with no name */
+	return sym->name == NULL;
 }
 
 static inline bool sym_is_choice_value(struct symbol *sym)
diff --git a/scripts/kconfig/parser.y b/scripts/kconfig/parser.y
index 8f339b47fe8d..b95993ff3837 100644
--- a/scripts/kconfig/parser.y
+++ b/scripts/kconfig/parser.y
@@ -224,7 +224,7 @@ config_option: T_MODULES T_EOL
 
 choice: T_CHOICE T_EOL
 {
-	struct symbol *sym = sym_lookup(NULL, SYMBOL_CHOICE);
+	struct symbol *sym = sym_lookup(NULL, 0);
 	sym->flags |= SYMBOL_NO_WRITE;
 	menu_add_entry(sym);
 	menu_add_expr(P_CHOICE, NULL, NULL);
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 81fe1884ef8a..8b34992ba5ed 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -827,7 +827,7 @@ struct symbol *sym_lookup(const char *name, int flags)
 			if (symbol->name &&
 			    !strcmp(symbol->name, name) &&
 			    (flags ? symbol->flags & flags
-				   : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
+				   : !(symbol->flags & SYMBOL_CONST)))
 				return symbol;
 		}
 		new_name = xstrdup(name);
-- 
2.40.1