kconfig: Sync with upstream v4.17

This commit introduces the following upstream changes:

17baab68d337 kconfig: extend output of 'listnewconfig'
b23d1a241f4e kbuild: add %.lex.c and %.tab.[ch] to 'targets' automatically
9a8dfb394c04 kbuild: clean up *.lex.c and *.tab.[ch] patterns from top-level Makefile
598893002745 .gitignore: move *.lex.c *.tab.[ch] patterns to the top-level .gitignore
18492685e479 kconfig: use yylineno option instead of manual lineno increments
379a8eb8eb1a kconfig: detect recursive inclusion earlier
32a94b8b0c3e kconfig: remove duplicated file name and lineno of recursive inclusion
26561514cc9d kconfig: do not include both curses.h and ncurses.h for nconfig
f8f69dc0b4e0 kconfig: make unmet dependency warnings readable
f622f8279581 kconfig: warn unmet direct dependency of tristate symbols selected by y
e2c75e7667c7 kconfig: tests: test if recursive inclusion is detected
29c434f367ea kconfig: tests: test if recursive dependencies are detected
3e4888c2e3d7 kconfig: tests: test randconfig for choice in choice
beaaddb62540 kconfig: tests: test defconfig when two choices interact
ee236610653e kconfig: tests: check visibility of tristate choice values in y choice
930c429a656f kconfig: tests: check unneeded "is not set" with unmet dependency
b76960c0f6b2 kconfig: tests: test if new symbols in choice are asked
49ac3c0c3aa3 kconfig: tests: test automatic submenu creation
1903c5119059 kconfig: tests: add basic choice tests
022a4bf6b59d kconfig: tests: add framework for Kconfig unit testing
2a61625835c7 kconfig: remove redundant streamline_config.pl prerequisite
911a91c39cab kconfig: rename silentoldconfig to syncconfig
81d2bc227305 kconfig: invoke oldconfig instead of silentoldconfig from local*config
2aad9b896213 kconfig: hide irrelevant sub-menus for oldconfig
99f0b6578bab kconfig: remove redundant input_mode test for check_conf() loop
4bb3a5b085cd kconfig: remove unneeded input_mode test in conf()
59a80b5e892d kconfig: do not call check_conf() for olddefconfig
f467c5640c29 kconfig: only write '# CONFIG_FOO is not set' for visible symbols
d9119b5925a0 kconfig: Print reverse dependencies in groups
9a47ceec543b kconfig: clean-up reverse dependency help implementation
07a422bb213a kbuild: restore autoksyms.h touch to the top Makefile

Signed-off-by: Chris Packham <judge.packham@gmail.com>

1 files changed, 28 insertions, 58 deletions

diff --git a/kconfig/expr.c b/kconfig/expr.c
index d453819..e1a39e9 100644
--- a/kconfig/expr.c
+++ b/kconfig/expr.c
@@ -1137,49 +1137,9 @@ static int expr_compare_type(enum expr_type t1, enum expr_type t2)
 	return 0;
 }
 
-static inline struct expr *
-expr_get_leftmost_symbol(const struct expr *e)
-{
-
-	if (e == NULL)
-		return NULL;
-
-	while (e->type != E_SYMBOL)
-		e = e->left.expr;
-
-	return expr_copy(e);
-}
-
-/*
- * Given expression `e1' and `e2', returns the leaf of the longest
- * sub-expression of `e1' not containing 'e2.
- */
-struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2)
-{
-	struct expr *ret;
-
-	switch (e1->type) {
-	case E_OR:
-		return expr_alloc_and(
-		    expr_simplify_unmet_dep(e1->left.expr, e2),
-		    expr_simplify_unmet_dep(e1->right.expr, e2));
-	case E_AND: {
-		struct expr *e;
-		e = expr_alloc_and(expr_copy(e1), expr_copy(e2));
-		e = expr_eliminate_dups(e);
-		ret = (!expr_eq(e, e1)) ? e1 : NULL;
-		expr_free(e);
-		break;
-		}
-	default:
-		ret = e1;
-		break;
-	}
-
-	return expr_get_leftmost_symbol(ret);
-}
-
-static void __expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *), void *data, int prevtoken, bool revdep)
+void expr_print(struct expr *e,
+		void (*fn)(void *, struct symbol *, const char *),
+		void *data, int prevtoken)
 {
 	if (!e) {
 		fn(data, NULL, "y");
@@ -1234,14 +1194,9 @@ static void __expr_print(struct expr *e, void (*fn)(void *, struct symbol *, con
 		fn(data, e->right.sym, e->right.sym->name);
 		break;
 	case E_OR:
-		if (revdep && e->left.expr->type != E_OR)
-			fn(data, NULL, "\n  - ");
-		__expr_print(e->left.expr, fn, data, E_OR, revdep);
-		if (revdep)
-			fn(data, NULL, "\n  - ");
-		else
-			fn(data, NULL, " || ");
-		__expr_print(e->right.expr, fn, data, E_OR, revdep);
+		expr_print(e->left.expr, fn, data, E_OR);
+		fn(data, NULL, " || ");
+		expr_print(e->right.expr, fn, data, E_OR);
 		break;
 	case E_AND:
 		expr_print(e->left.expr, fn, data, E_AND);
@@ -1274,11 +1229,6 @@ static void __expr_print(struct expr *e, void (*fn)(void *, struct symbol *, con
 		fn(data, NULL, ")");
 }
 
-void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *), void *data, int prevtoken)
-{
-	__expr_print(e, fn, data, prevtoken, false);
-}
-
 static void expr_print_file_helper(void *data, struct symbol *sym, const char *str)
 {
 	xfwrite(str, strlen(str), 1, data);
@@ -1329,7 +1279,27 @@ void expr_gstr_print(struct expr *e, struct gstr *gs)
  * line with a minus. This makes expressions much easier to read.
  * Suitable for reverse dependency expressions.
  */
-void expr_gstr_print_revdep(struct expr *e, struct gstr *gs)
+static void expr_print_revdep(struct expr *e,
+			      void (*fn)(void *, struct symbol *, const char *),
+			      void *data, tristate pr_type, const char **title)
+{
+	if (e->type == E_OR) {
+		expr_print_revdep(e->left.expr, fn, data, pr_type, title);
+		expr_print_revdep(e->right.expr, fn, data, pr_type, title);
+	} else if (expr_calc_value(e) == pr_type) {
+		if (*title) {
+			fn(data, NULL, *title);
+			*title = NULL;
+		}
+
+		fn(data, NULL, "  - ");
+		expr_print(e, fn, data, E_NONE);
+		fn(data, NULL, "\n");
+	}
+}
+
+void expr_gstr_print_revdep(struct expr *e, struct gstr *gs,
+			    tristate pr_type, const char *title)
 {
-	__expr_print(e, expr_print_gstr_helper, gs, E_NONE, true);
+	expr_print_revdep(e, expr_print_gstr_helper, gs, pr_type, &title);
 }