| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 7 Sep 2012 11:32:36 +0800
From: Ming Lei <ming.lei@...onical.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rjw@...k.pl>,
Borislav Petkov <borislav.petkov@....com>,
linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v1 12/15] firmware: introduce device_cache/uncache_fw_images
On Fri, Sep 7, 2012 at 6:44 AM, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Sat, 4 Aug 2012 12:01:27 +0800
> Ming Lei <ming.lei@...onical.com> wrote:
>
>> This patch introduces the three helpers below:
>>
>> void device_cache_fw_images(void)
>> void device_uncache_fw_images(void)
>> void device_uncache_fw_images_delay(unsigned long)
>
> CONFIG_PM=n:
>
> drivers/base/firmware_class.c:1147: warning: 'device_cache_fw_images' defined but not used
> drivers/base/firmware_class.c:1212: warning: 'device_uncache_fw_images_delay' defined but not used
Thanks for your report.
>
> the fix is not trivial - this patch added quite a lot of code and data
> structure bloat which will never be used on CONFIG_PM=n kernels.
The below patch should fix the warning.
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 95f6851..6e21080 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -96,7 +96,9 @@ struct firmware_cache {
/* firmware_buf instance will be added into the below list */
spinlock_t lock;
struct list_head head;
+ int state;
+#ifdef CONFIG_PM_SLEEP
/*
* Names of firmware images which have been cached successfully
* will be added into the below list so that device uncache
@@ -106,13 +108,12 @@ struct firmware_cache {
spinlock_t name_lock;
struct list_head fw_names;
- int state;
-
wait_queue_head_t wait_queue;
int cnt;
struct delayed_work work;
struct notifier_block pm_notify;
+#endif
};
struct firmware_buf {
@@ -622,6 +623,7 @@ static void fw_set_page_data(struct firmware_buf
*buf, struct firmware *fw)
(unsigned int)buf->size);
}
+#ifdef CONFIG_PM_SLEEP
static void fw_name_devm_release(struct device *dev, void *res)
{
struct fw_name_devm *fwn = res;
@@ -670,6 +672,12 @@ static int fw_add_devm_name(struct device *dev,
const char *name)
return 0;
}
+#else
+static int fw_add_devm_name(struct device *dev, const char *name)
+{
+ return 0;
+}
+#endif
static void _request_firmware_cleanup(const struct firmware **firmware_p)
{
@@ -1046,6 +1054,7 @@ int uncache_firmware(const char *fw_name)
return -EINVAL;
}
+#ifdef CONFIG_PM_SLEEP
static struct fw_cache_entry *alloc_fw_cache_entry(const char *name)
{
struct fw_cache_entry *fce;
@@ -1258,7 +1267,6 @@ static void
device_uncache_fw_images_delay(unsigned long delay)
msecs_to_jiffies(delay));
}
-#ifdef CONFIG_PM
static int fw_pm_notify(struct notifier_block *notify_block,
unsigned long mode, void *unused)
{
@@ -1285,13 +1293,6 @@ static int fw_pm_notify(struct notifier_block
*notify_block,
return 0;
}
-#else
-static int fw_pm_notify(struct notifier_block *notify_block,
- unsigned long mode, void *unused)
-{
- return 0;
-}
-#endif
/* stop caching firmware once syscore_suspend is reached */
static int fw_suspend(void)
@@ -1303,16 +1304,23 @@ static int fw_suspend(void)
static struct syscore_ops fw_syscore_ops = {
.suspend = fw_suspend,
};
+#else
+static int fw_cache_piggyback_on_request(const char *name)
+{
+ return 0;
+}
+#endif
static void __init fw_cache_init(void)
{
spin_lock_init(&fw_cache.lock);
INIT_LIST_HEAD(&fw_cache.head);
+ fw_cache.state = FW_LOADER_NO_CACHE;
+#ifdef CONFIG_PM_SLEEP
spin_lock_init(&fw_cache.name_lock);
INIT_LIST_HEAD(&fw_cache.fw_names);
fw_cache.cnt = 0;
- fw_cache.state = FW_LOADER_NO_CACHE;
init_waitqueue_head(&fw_cache.wait_queue);
INIT_DELAYED_WORK(&fw_cache.work,
@@ -1322,6 +1330,7 @@ static void __init fw_cache_init(void)
register_pm_notifier(&fw_cache.pm_notify);
register_syscore_ops(&fw_syscore_ops);
+#endif
}
static int __init firmware_class_init(void)
@@ -1332,8 +1341,10 @@ static int __init firmware_class_init(void)
static void __exit firmware_class_exit(void)
{
+#ifdef CONFIG_PM_SLEEP
unregister_syscore_ops(&fw_syscore_ops);
unregister_pm_notifier(&fw_cache.pm_notify);
+#endif
class_unregister(&firmware_class);
}
Thanks,
--
Ming Lei
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists