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From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 18/29] modpost: show warning if vmlinux is not found when processing modules
Date: Mon, 25 May 2020 00:42:24 +0900	[thread overview]
Message-ID: <20200524154235.380482-19-masahiroy@kernel.org> (raw)
In-Reply-To: <20200524154235.380482-1-masahiroy@kernel.org>

check_exports() does not print warnings about unresolved symbols if
vmlinux is missing because there would be too many.

This situation happens when you do 'make modules' from the clean
tree, or compile external modules against a kernel tree that has
not been completely built.

Not checking unresolved symbols is dangerous because you might be
building useless modules. At least it should be noted.

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

Changes in v2: None

 scripts/mod/modpost.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 0a24d2c501c1..638c45d35292 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2014,8 +2014,6 @@ static void read_symbols(const char *modname)
 
 	mod = new_module(modname);
 
-	/* When there's no vmlinux, don't print warnings about
-	 * unresolved symbols (since there'll be too many ;) */
 	if (is_vmlinux(modname)) {
 		have_vmlinux = 1;
 		mod->skip = 1;
@@ -2627,6 +2625,13 @@ int main(int argc, char **argv)
 	if (files_source)
 		read_symbols_from_files(files_source);
 
+	/*
+	 * When there's no vmlinux, don't print warnings about
+	 * unresolved symbols (since there'll be too many ;)
+	 */
+	if (!have_vmlinux)
+		warn("Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped.\n");
+
 	err = 0;
 
 	for (mod = modules; mod; mod = mod->next) {
-- 
2.25.1


  parent reply	other threads:[~2020-05-24 15:44 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-24 15:42 [PATCH v2 00/29] modpost: various fixes, cleanups, optimizations Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 01/29] modpost: drop RCS/CVS $Revision handling in MODULE_VERSION() Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 02/29] modpost: do not call get_modinfo() for vmlinux Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 03/29] modpost: add read_text_file() and get_line() helpers Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 04/29] modpost: fix potential mmap'ed file overrun in get_src_version() Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 05/29] modpost: re-add warning about missing *.mod file Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 06/29] modpost: avoid false-positive file open error Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 07/29] modpost: use read_text_file() and get_line() for reading text files Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 08/29] modpost: remove get_next_text() and make {grab,release_}file static Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 09/29] kbuild: disallow multi-word in M= or KBUILD_EXTMOD Masahiro Yamada
2020-05-31 18:31   ` Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 10/29] modpost: move -T option close to the modpost command Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 11/29] modpost: pass -N option only for modules modpost Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 12/29] modpost: move external module options Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 13/29] modpost: load KBUILD_EXTRA_SYMBOLS files in order Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 14/29] modpost: track if the symbol origin is a dump file or ELF object Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 15/29] modpost: allow to pass -i option multiple times remove -e option Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 16/29] modpost: rename ext_sym_list to dump_list Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 17/29] modpost: re-add -e to set external_module flag Masahiro Yamada
2020-05-24 15:42 ` Masahiro Yamada [this message]
2020-05-24 15:42 ` [PATCH v2 19/29] modpost: show warning if it fails to read symbol dump file Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 20/29] modpost: generate vmlinux.symvers and reuse it for the second modpost Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 21/29] modpost: remove -s option Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 22/29] modpost: remove mod->is_dot_o struct member Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 23/29] modpost: remove is_vmlinux() call in check_for_{gpl_usage,unused}() Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 24/29] modpost: add mod->is_vmlinux struct member Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 25/29] modpost: remove mod->skip " Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 26/29] modpost: set have_vmlinux in new_module() Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 27/29] modpost: strip .o from modname before calling new_module() Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 28/29] modpost: remove is_vmlinux() helper Masahiro Yamada
2020-05-24 15:42 ` [PATCH v2 29/29] modpost: change elf_info->size to size_t Masahiro Yamada

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