All of lore.kernel.org
 help / color / mirror / Atom feed
From: Masahiro Yamada <yamada.masahiro@socionext.com>
To: linux-kbuild@vger.kernel.org
Cc: Michal Marek <michal.lkml@markovi.net>,
	Sam Ravnborg <sam@ravnborg.org>, Dirk Gouders <dirk@gouders.net>,
	Ulf Magnusson <ulfalizer@gmail.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] kconfig: improve the recursive dependency report
Date: Tue, 14 Aug 2018 15:43:41 +0900	[thread overview]
Message-ID: <1534229021-8056-2-git-send-email-yamada.masahiro@socionext.com> (raw)
In-Reply-To: <1534229021-8056-1-git-send-email-yamada.masahiro@socionext.com>

This commit improves the warning messages of the recursive dependency.
Currently, sym->dir_dep.expr is not checked.  Hence, any dependency in
property visibility is regarded as the dependency of the symbol.

[Test Code 1]

  config A
          bool "a"
          depends on B

  config B
          bool "b"
          depends on A

[Test Code 2]

  config A
          bool "a" if B

  config B
          bool "b"
          depends on A

For both cases above, the same message is displayed:

        symbol B depends on A
        symbol A depends on B

This commit changes the message for the latter case like this:

        symbol B depends on A
        symbol A prompt is visible depending on B

Also, 'select' and 'imply' are distinguished.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

 scripts/kconfig/symbol.c | 48 ++++++++++++++++++++++++++++++++++--------------
 1 file changed, 34 insertions(+), 14 deletions(-)

diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 7de7463a..9cc443b 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -1011,7 +1011,7 @@ static struct dep_stack {
 	struct dep_stack *prev, *next;
 	struct symbol *sym;
 	struct property *prop;
-	struct expr *expr;
+	struct expr **expr;
 } *check_top;
 
 static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
@@ -1076,31 +1076,42 @@ static void sym_check_print_recursive(struct symbol *last_sym)
 			fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
 				prop->file->name, prop->lineno);
 
-		if (stack->expr) {
-			fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
-				prop->file->name, prop->lineno,
+		if (sym_is_choice(sym)) {
+			fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
+				menu->file->name, menu->lineno,
+				sym->name ? sym->name : "<choice>",
+				next_sym->name ? next_sym->name : "<choice>");
+		} else if (sym_is_choice_value(sym)) {
+			fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
+				menu->file->name, menu->lineno,
 				sym->name ? sym->name : "<choice>",
-				prop_get_type_name(prop->type),
 				next_sym->name ? next_sym->name : "<choice>");
-		} else if (stack->prop) {
+		} else if (stack->expr == &sym->dir_dep.expr) {
 			fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
 				prop->file->name, prop->lineno,
 				sym->name ? sym->name : "<choice>",
 				next_sym->name ? next_sym->name : "<choice>");
-		} else if (sym_is_choice(sym)) {
-			fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
-				menu->file->name, menu->lineno,
+		} else if (stack->expr == &sym->rev_dep.expr) {
+			fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
+				prop->file->name, prop->lineno,
 				sym->name ? sym->name : "<choice>",
 				next_sym->name ? next_sym->name : "<choice>");
-		} else if (sym_is_choice_value(sym)) {
-			fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
-				menu->file->name, menu->lineno,
+		} else if (stack->expr == &sym->implied.expr) {
+			fprintf(stderr, "%s:%d:\tsymbol %s is implied by %s\n",
+				prop->file->name, prop->lineno,
 				sym->name ? sym->name : "<choice>",
 				next_sym->name ? next_sym->name : "<choice>");
+		} else if (stack->expr) {
+			fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
+				prop->file->name, prop->lineno,
+				sym->name ? sym->name : "<choice>",
+				prop_get_type_name(prop->type),
+				next_sym->name ? next_sym->name : "<choice>");
 		} else {
-			fprintf(stderr, "%s:%d:\tsymbol %s is selected or implied by %s\n",
+			fprintf(stderr, "%s:%d:\tsymbol %s %s is visible depending on %s\n",
 				prop->file->name, prop->lineno,
 				sym->name ? sym->name : "<choice>",
+				prop_get_type_name(prop->type),
 				next_sym->name ? next_sym->name : "<choice>");
 		}
 	}
@@ -1157,14 +1168,23 @@ static struct symbol *sym_check_sym_deps(struct symbol *sym)
 
 	dep_stack_insert(&stack, sym);
 
+	stack.expr = &sym->dir_dep.expr;
+	sym2 = sym_check_expr_deps(sym->dir_dep.expr);
+	if (sym2)
+		goto out;
+
+	stack.expr = &sym->rev_dep.expr;
 	sym2 = sym_check_expr_deps(sym->rev_dep.expr);
 	if (sym2)
 		goto out;
 
+	stack.expr = &sym->implied.expr;
 	sym2 = sym_check_expr_deps(sym->implied.expr);
 	if (sym2)
 		goto out;
 
+	stack.expr = NULL;
+
 	for (prop = sym->prop; prop; prop = prop->next) {
 		if (prop->type == P_CHOICE || prop->type == P_SELECT ||
 		    prop->type == P_IMPLY)
@@ -1175,7 +1195,7 @@ static struct symbol *sym_check_sym_deps(struct symbol *sym)
 			break;
 		if (prop->type != P_DEFAULT || sym_is_choice(sym))
 			continue;
-		stack.expr = prop->expr;
+		stack.expr = &prop->expr;
 		sym2 = sym_check_expr_deps(prop->expr);
 		if (sym2)
 			break;
-- 
2.7.4


  reply	other threads:[~2018-08-14  6:45 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-14  6:43 [PATCH 1/2] kconfig: report recursive dependency involving 'imply' Masahiro Yamada
2018-08-14  6:43 ` Masahiro Yamada [this message]
2018-08-14 10:38 ` Dirk Gouders
2018-08-14 13:44   ` Dirk Gouders
2018-08-15  6:29     ` Masahiro Yamada
2018-08-15  6:27   ` Masahiro Yamada
2018-08-15 13:10     ` Dirk Gouders

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1534229021-8056-2-git-send-email-yamada.masahiro@socionext.com \
    --to=yamada.masahiro@socionext.com \
    --cc=dirk@gouders.net \
    --cc=linux-kbuild@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=michal.lkml@markovi.net \
    --cc=sam@ravnborg.org \
    --cc=ulfalizer@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.