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Message-Id: <20070212142919.5ce91086.randy.dunlap@oracle.com>
Date: Mon, 12 Feb 2007 14:29:19 -0800
From: Randy Dunlap <randy.dunlap@...cle.com>
To: akpm <akpm@...l.org>
Cc: lkml <linux-kernel@...r.kernel.org>, gregkh@...e.de
Subject: [PATCH] build errors: uevent with CONFIG_SYSFS=n
On Mon, 12 Feb 2007 13:50:21 -0800 Randy Dunlap wrote:
>
> in kernel/params.c:
>
> kernel/params.c:700: error: 'module_uevent_ops' undeclared here (not in a function)
>
> in kernel/module.c:
>
> kernel/built-in.o: In function `module_add_driver':
> (.text+0x20c5b): undefined reference to `module_subsys'
> kernel/built-in.o: In function `sys_init_module':
> (.text+0x2177c): undefined reference to `module_subsys'
> kernel/built-in.o: In function `sys_init_module':
> (.text+0x21838): undefined reference to `module_subsys'
> kernel/built-in.o: In function `kernel_param_sysfs_setup':
> params.c:(.init.text+0x1492): undefined reference to `module_subsys'
> kernel/built-in.o: In function `param_sysfs_init':
> params.c:(.init.text+0x14f8): undefined reference to `module_subsys'
>
> Are these already fixed?
Here's a patch, tested both ways (SYSFS=y, SYSFS=n).
---
From: Randy Dunlap <randy.dunlap@...cle.com>
Fix source files to build with CONFIG_SYSFS=n.
module_subsys is not available.
Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
---
drivers/base/bus.c | 4 ++++
kernel/module.c | 10 ++++++++++
kernel/params.c | 20 ++++++++++----------
3 files changed, 24 insertions(+), 10 deletions(-)
--- linux-2.6.20-git7.orig/kernel/params.c
+++ linux-2.6.20-git7/kernel/params.c
@@ -30,8 +30,6 @@
#define DEBUGP(fmt, a...)
#endif
-static struct kobj_type module_ktype;
-
static inline char dash2underscore(char c)
{
if (c == '-')
@@ -673,6 +671,8 @@ static struct sysfs_ops module_sysfs_ops
.store = module_attr_store,
};
+static struct kobj_type module_ktype;
+
static int uevent_filter(struct kset *kset, struct kobject *kobj)
{
struct kobj_type *ktype = get_ktype(kobj);
@@ -686,19 +686,12 @@ static struct kset_uevent_ops module_uev
.filter = uevent_filter,
};
-#else
-static struct sysfs_ops module_sysfs_ops = {
- .show = NULL,
- .store = NULL,
-};
-#endif
+decl_subsys(module, &module_ktype, &module_uevent_ops);
static struct kobj_type module_ktype = {
.sysfs_ops = &module_sysfs_ops,
};
-decl_subsys(module, &module_ktype, &module_uevent_ops);
-
/*
* param_sysfs_init - wrapper for built-in params support
*/
@@ -719,6 +712,13 @@ static int __init param_sysfs_init(void)
}
subsys_initcall(param_sysfs_init);
+#else
+static struct sysfs_ops module_sysfs_ops = {
+ .show = NULL,
+ .store = NULL,
+};
+#endif
+
EXPORT_SYMBOL(param_set_byte);
EXPORT_SYMBOL(param_get_byte);
EXPORT_SYMBOL(param_set_short);
--- linux-2.6.20-git7.orig/kernel/module.c
+++ linux-2.6.20-git7/kernel/module.c
@@ -1110,6 +1110,7 @@ static void module_remove_modinfo_attrs(
kfree(mod->modinfo_attrs);
}
+#ifdef CONFIG_SYSFS
static int mod_sysfs_init(struct module *mod)
{
int err;
@@ -1148,6 +1149,7 @@ static int mod_sysfs_setup(struct module
if (!mod->holders_dir)
goto out_unreg;
+#ifdef CONFIG_SYSFS
err = module_param_sysfs_setup(mod, kparam, num_params);
if (err)
goto out_unreg_holders;
@@ -1155,6 +1157,7 @@ static int mod_sysfs_setup(struct module
err = module_add_modinfo_attrs(mod);
if (err)
goto out_unreg_param;
+#endif
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
return 0;
@@ -1169,6 +1172,7 @@ out_unreg:
out:
return err;
}
+#endif
static void mod_kobject_remove(struct module *mod)
{
@@ -1782,9 +1786,11 @@ static struct module *load_module(void _
/* Now we've moved module, initialize linked lists, etc. */
module_unload_init(mod);
+#ifdef CONFIG_SYSFS
/* Initialize kobject, so we can reference it. */
if (mod_sysfs_init(mod) != 0)
goto cleanup;
+#endif
/* Set up license info based on the info section */
set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
@@ -1917,6 +1923,7 @@ static struct module *load_module(void _
if (err < 0)
goto arch_cleanup;
+#ifdef CONFIG_SYSFS
err = mod_sysfs_setup(mod,
(struct kernel_param *)
sechdrs[setupindex].sh_addr,
@@ -1924,6 +1931,7 @@ static struct module *load_module(void _
/ sizeof(struct kernel_param));
if (err < 0)
goto arch_cleanup;
+#endif
add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
/* Size of section 0 is 0, so this works well if no unwind info. */
@@ -2366,6 +2374,7 @@ static void module_create_drivers_dir(st
mk->drivers_dir = kobject_add_dir(&mk->kobj, "drivers");
}
+#ifdef CONFIG_SYSFS
void module_add_driver(struct module *mod, struct device_driver *drv)
{
char *driver_name;
@@ -2419,6 +2428,7 @@ void module_remove_driver(struct device_
}
}
EXPORT_SYMBOL(module_remove_driver);
+#endif
#ifdef CONFIG_MODVERSIONS
/* Generate the signature for struct module here, too, for modversions. */
--- linux-2.6.20-git7.orig/drivers/base/bus.c
+++ linux-2.6.20-git7/drivers/base/bus.c
@@ -547,7 +547,9 @@ int bus_add_driver(struct device_driver
if (error)
goto out_unregister;
klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
+#ifdef CONFIG_SYSFS
module_add_driver(drv->owner, drv);
+#endif
error = driver_add_attrs(bus, drv);
if (error) {
@@ -589,7 +591,9 @@ void bus_remove_driver(struct device_dri
klist_remove(&drv->knode_bus);
pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name);
driver_detach(drv);
+#ifdef CONFIG_SYSFS
module_remove_driver(drv);
+#endif
kobject_unregister(&drv->kobj);
put_bus(drv->bus);
}
-
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