The patch titled
fail kernel compilation in case of unresolved module symbols
has been removed from the -mm tree. Its filename is
fail-kernel-compilation-in-case-of-unresolved-symbols-v2.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: fail kernel compilation in case of unresolved module symbols
From: Kirill Korotaev <dev@xxxxxxxxxx>
At stage 2 modpost utility is used to check modules. In case of unresolved
symbols modpost only prints warning.
IMHO it is a good idea to fail compilation process in case of unresolved
symbols (at least in modules coming with kernel), since usually such errors
are left unnoticed, but kernel modules are broken.
- new option '-w' is added to modpost:
if option is specified, modpost only warns about unresolved symbols
- modpost is called with '-w' for external modules in Makefile.modpost
Signed-off-by: Andrey Mirkin <amirkin@xxxxx>
Signed-off-by: Kirill Korotaev <dev@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
scripts/Makefile.modpost | 1 +
scripts/mod/modpost.c | 25 +++++++++++++++++++------
2 files changed, 20 insertions(+), 6 deletions(-)
diff -puN scripts/Makefile.modpost~fail-kernel-compilation-in-case-of-unresolved-symbols-v2 scripts/Makefile.modpost
--- a/scripts/Makefile.modpost~fail-kernel-compilation-in-case-of-unresolved-symbols-v2
+++ a/scripts/Makefile.modpost
@@ -58,6 +58,7 @@ quiet_cmd_modpost = MODPOST $(words $(fi
$(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \
$(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
+ $(if $(KBUILD_EXTMOD),-w) \
$(wildcard vmlinux) $(filter-out FORCE,$^)
PHONY += __modpost
diff -puN scripts/mod/modpost.c~fail-kernel-compilation-in-case-of-unresolved-symbols-v2 scripts/mod/modpost.c
--- a/scripts/mod/modpost.c~fail-kernel-compilation-in-case-of-unresolved-symbols-v2
+++ a/scripts/mod/modpost.c
@@ -23,6 +23,8 @@ int have_vmlinux = 0;
static int all_versions = 0;
/* If we are modposting external module set to 1 */
static int external_module = 0;
+/* Only warn about unresolved symbols */
+static int warn_unresolved = 0;
/* How a symbol is exported */
enum export {
export_plain, export_unused, export_gpl,
@@ -1196,16 +1198,19 @@ static void add_header(struct buffer *b,
/**
* Record CRCs for unresolved symbols
**/
-static void add_versions(struct buffer *b, struct module *mod)
+static int add_versions(struct buffer *b, struct module *mod)
{
struct symbol *s, *exp;
+ int err = 0;
for (s = mod->unres; s; s = s->next) {
exp = find_symbol(s->name);
if (!exp || exp->module == mod) {
- if (have_vmlinux && !s->weak)
+ if (have_vmlinux && !s->weak) {
warn("\"%s\" [%s.ko] undefined!\n",
s->name, mod->name);
+ err = warn_unresolved ? 0 : 1;
+ }
continue;
}
s->module = exp->module;
@@ -1214,7 +1219,7 @@ static void add_versions(struct buffer *
}
if (!modversions)
- return;
+ return err;
buf_printf(b, "\n");
buf_printf(b, "static const struct modversion_info ____versions[]\n");
@@ -1234,6 +1239,8 @@ static void add_versions(struct buffer *
}
buf_printf(b, "};\n");
+
+ return err;
}
static void add_depends(struct buffer *b, struct module *mod,
@@ -1411,8 +1418,9 @@ int main(int argc, char **argv)
char *kernel_read = NULL, *module_read = NULL;
char *dump_write = NULL;
int opt;
+ int err;
- while ((opt = getopt(argc, argv, "i:I:mo:a")) != -1) {
+ while ((opt = getopt(argc, argv, "i:I:mo:aw")) != -1) {
switch(opt) {
case 'i':
kernel_read = optarg;
@@ -1430,6 +1438,9 @@ int main(int argc, char **argv)
case 'a':
all_versions = 1;
break;
+ case 'w':
+ warn_unresolved = 1;
+ break;
default:
exit(1);
}
@@ -1450,6 +1461,8 @@ int main(int argc, char **argv)
check_exports(mod);
}
+ err = 0;
+
for (mod = modules; mod; mod = mod->next) {
if (mod->skip)
continue;
@@ -1457,7 +1470,7 @@ int main(int argc, char **argv)
buf.pos = 0;
add_header(&buf, mod);
- add_versions(&buf, mod);
+ err |= add_versions(&buf, mod);
add_depends(&buf, mod, modules);
add_moddevtable(&buf, mod);
add_srcversion(&buf, mod);
@@ -1469,5 +1482,5 @@ int main(int argc, char **argv)
if (dump_write)
write_dump(dump_write);
- return 0;
+ return err;
}
_
Patches currently in -mm which might be from dev@xxxxxxxxxx are
origin.patch
fix-unserialized-task-files-changing.patch
fix-unserialized-task-files-changing-fix.patch
submittingpatches-add-a-note-about-format=flowed-when-sending-patches.patch
proc-sysctl-add-_proc_do_string-helper.patch
namespaces-add-nsproxy.patch
namespaces-add-nsproxy-move-init_nsproxy-into-kernel-nsproxyc.patch
namespaces-incorporate-fs-namespace-into-nsproxy.patch
namespaces-exit_task_namespaces-invalidates-nsproxy.patch
namespaces-utsname-introduce-temporary-helpers.patch
namespaces-utsname-switch-to-using-uts-namespaces.patch
namespaces-utsname-switch-to-using-uts-namespaces-klibc-bit.patch
namespaces-utsname-use-init_utsname-when-appropriate-klibc-bit.patch
namespaces-utsname-switch-to-using-uts-namespaces-klibc-bit-2.patch
namespaces-utsname-use-init_utsname-when-appropriate.patch
namespaces-utsname-implement-utsname-namespaces.patch
namespaces-utsname-sysctl-hack.patch
namespaces-utsname-remove-system_utsname.patch
namespaces-utsname-implement-clone_newuts-flag.patch
namespaces-utsname-implement-clone_newuts-flag-fix.patch
uts-copy-nsproxy-only-when-needed.patch
ipc-namespace-core.patch
ipc-namespace-utils.patch
ipc-namespace-msg.patch
ipc-namespace-sem.patch
ipc-namespace-shm.patch
ipc-namespace-sysctls.patch
-
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