2022-09-29 12:51:11

by Rasmus Villemoes

[permalink] [raw]
Subject: [PATCH] module: remove redundant module_sysfs_initialized variable

The variable module_sysfs_initialized is used for checking whether
module_kset has been initialized. Checking module_kset itself works
just fine for that.

Signed-off-by: Rasmus Villemoes <[email protected]>
---
include/linux/module.h | 1 -
kernel/module/sysfs.c | 2 +-
kernel/params.c | 2 --
3 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/module.h b/include/linux/module.h
index 518296ea7f73..727176de2890 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -827,7 +827,6 @@ void *dereference_module_function_descriptor(struct module *mod, void *ptr)
#ifdef CONFIG_SYSFS
extern struct kset *module_kset;
extern struct kobj_type module_ktype;
-extern int module_sysfs_initialized;
#endif /* CONFIG_SYSFS */

#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
diff --git a/kernel/module/sysfs.c b/kernel/module/sysfs.c
index ce68f821dcd1..c921bf044050 100644
--- a/kernel/module/sysfs.c
+++ b/kernel/module/sysfs.c
@@ -340,7 +340,7 @@ static int mod_sysfs_init(struct module *mod)
int err;
struct kobject *kobj;

- if (!module_sysfs_initialized) {
+ if (!module_kset) {
pr_err("%s: module sysfs not initialized\n", mod->name);
err = -EINVAL;
goto out;
diff --git a/kernel/params.c b/kernel/params.c
index 5b92310425c5..8d4e9a3f0df2 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -940,7 +940,6 @@ static const struct kset_uevent_ops module_uevent_ops = {
};

struct kset *module_kset;
-int module_sysfs_initialized;

static void module_kobj_release(struct kobject *kobj)
{
@@ -964,7 +963,6 @@ static int __init param_sysfs_init(void)
__FILE__, __LINE__);
return -ENOMEM;
}
- module_sysfs_initialized = 1;

version_sysfs_builtin();
param_sysfs_builtin();
--
2.37.2


2022-09-30 11:46:13

by Miroslav Benes

[permalink] [raw]
Subject: Re: [PATCH] module: remove redundant module_sysfs_initialized variable

On Thu, 29 Sep 2022, Rasmus Villemoes wrote:

> The variable module_sysfs_initialized is used for checking whether
> module_kset has been initialized. Checking module_kset itself works
> just fine for that.
>
> Signed-off-by: Rasmus Villemoes <[email protected]>

Reviewed-by: Miroslav Benes <[email protected]>

M

2022-10-04 00:50:07

by Luis Chamberlain

[permalink] [raw]
Subject: Re: [PATCH] module: remove redundant module_sysfs_initialized variable

On Thu, Sep 29, 2022 at 02:10:39PM +0200, Rasmus Villemoes wrote:
> The variable module_sysfs_initialized is used for checking whether
> module_kset has been initialized. Checking module_kset itself works
> just fine for that.
>
> Signed-off-by: Rasmus Villemoes <[email protected]>

Looks pretty sane to me, thanks! I'll queue this up for 6.2
as we didn't get a chance to spin test this for 6.1 on linux-next.

Luis

2022-10-04 04:46:47

by Christophe Leroy

[permalink] [raw]
Subject: Re: [PATCH] module: remove redundant module_sysfs_initialized variable



Le 04/10/2022 à 01:40, Luis Chamberlain a écrit :
> On Thu, Sep 29, 2022 at 02:10:39PM +0200, Rasmus Villemoes wrote:
>> The variable module_sysfs_initialized is used for checking whether
>> module_kset has been initialized. Checking module_kset itself works
>> just fine for that.
>>
>> Signed-off-by: Rasmus Villemoes <[email protected]>
>
> Looks pretty sane to me, thanks! I'll queue this up for 6.2
> as we didn't get a chance to spin test this for 6.1 on linux-next.
>

Maybe you can mention that this is a leftover from commit 7405c1e15edf
("kset: convert /sys/module to use kset_create")

Christophe

2022-10-04 16:57:09

by Luis Chamberlain

[permalink] [raw]
Subject: Re: [PATCH] module: remove redundant module_sysfs_initialized variable

On Tue, Oct 04, 2022 at 04:35:43AM +0000, Christophe Leroy wrote:
>
>
> Le 04/10/2022 ? 01:40, Luis Chamberlain a ?crit?:
> > On Thu, Sep 29, 2022 at 02:10:39PM +0200, Rasmus Villemoes wrote:
> >> The variable module_sysfs_initialized is used for checking whether
> >> module_kset has been initialized. Checking module_kset itself works
> >> just fine for that.
> >>
> >> Signed-off-by: Rasmus Villemoes <[email protected]>
> >
> > Looks pretty sane to me, thanks! I'll queue this up for 6.2
> > as we didn't get a chance to spin test this for 6.1 on linux-next.
> >
>
> Maybe you can mention that this is a leftover from commit 7405c1e15edf
> ("kset: convert /sys/module to use kset_create")

Sure, did that.

Luis