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From: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
To: Matt Fleming <matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
Subject: [PATCH] firmware: Do not use WARN_ON(!spin_is_locked())
Date: Sun, 10 Aug 2014 20:54:13 -0700	[thread overview]
Message-ID: <1407729253-31341-1-git-send-email-linux@roeck-us.net> (raw)

spin_is_locked() always returns false for uniprocessor configurations,
so do not use WARN_ON with it. WARN_ON_SMP() exists for that very
purpose and must be used instead.

Signed-off-by: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
---
 drivers/firmware/efi/vars.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
index f0a4364..6f3623c 100644
--- a/drivers/firmware/efi/vars.c
+++ b/drivers/firmware/efi/vars.c
@@ -481,7 +481,7 @@ EXPORT_SYMBOL_GPL(efivar_entry_remove);
  */
 static void efivar_entry_list_del_unlock(struct efivar_entry *entry)
 {
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	list_del(&entry->list);
 	spin_unlock_irq(&__efivars->lock);
@@ -507,7 +507,7 @@ int __efivar_entry_delete(struct efivar_entry *entry)
 	const struct efivar_operations *ops = __efivars->ops;
 	efi_status_t status;
 
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	status = ops->set_variable(entry->var.VariableName,
 				   &entry->var.VendorGuid,
@@ -667,7 +667,7 @@ struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
 	int strsize1, strsize2;
 	bool found = false;
 
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	list_for_each_entry_safe(entry, n, head, list) {
 		strsize1 = ucs2_strsize(name, 1024);
@@ -739,7 +739,7 @@ int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
 	const struct efivar_operations *ops = __efivars->ops;
 	efi_status_t status;
 
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	status = ops->get_variable(entry->var.VariableName,
 				   &entry->var.VendorGuid,
-- 
1.9.1

WARNING: multiple messages have this Message-ID (diff)
From: Guenter Roeck <linux@roeck-us.net>
To: Matt Fleming <matt.fleming@intel.com>
Cc: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
	Guenter Roeck <linux@roeck-us.net>
Subject: [PATCH] firmware: Do not use WARN_ON(!spin_is_locked())
Date: Sun, 10 Aug 2014 20:54:13 -0700	[thread overview]
Message-ID: <1407729253-31341-1-git-send-email-linux@roeck-us.net> (raw)

spin_is_locked() always returns false for uniprocessor configurations,
so do not use WARN_ON with it. WARN_ON_SMP() exists for that very
purpose and must be used instead.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/firmware/efi/vars.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
index f0a4364..6f3623c 100644
--- a/drivers/firmware/efi/vars.c
+++ b/drivers/firmware/efi/vars.c
@@ -481,7 +481,7 @@ EXPORT_SYMBOL_GPL(efivar_entry_remove);
  */
 static void efivar_entry_list_del_unlock(struct efivar_entry *entry)
 {
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	list_del(&entry->list);
 	spin_unlock_irq(&__efivars->lock);
@@ -507,7 +507,7 @@ int __efivar_entry_delete(struct efivar_entry *entry)
 	const struct efivar_operations *ops = __efivars->ops;
 	efi_status_t status;
 
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	status = ops->set_variable(entry->var.VariableName,
 				   &entry->var.VendorGuid,
@@ -667,7 +667,7 @@ struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
 	int strsize1, strsize2;
 	bool found = false;
 
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	list_for_each_entry_safe(entry, n, head, list) {
 		strsize1 = ucs2_strsize(name, 1024);
@@ -739,7 +739,7 @@ int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
 	const struct efivar_operations *ops = __efivars->ops;
 	efi_status_t status;
 
-	WARN_ON(!spin_is_locked(&__efivars->lock));
+	WARN_ON_SMP(!spin_is_locked(&__efivars->lock));
 
 	status = ops->get_variable(entry->var.VariableName,
 				   &entry->var.VendorGuid,
-- 
1.9.1


             reply	other threads:[~2014-08-11  3:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-11  3:54 Guenter Roeck [this message]
2014-08-11  3:54 ` [PATCH] firmware: Do not use WARN_ON(!spin_is_locked()) Guenter Roeck
     [not found] ` <1407729253-31341-1-git-send-email-linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2014-08-13 14:18   ` Matt Fleming
2014-08-13 14:18     ` Matt Fleming
     [not found]     ` <20140813141836.GQ15082-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-08-13 14:37       ` Guenter Roeck
2014-08-13 14:37         ` Guenter Roeck
     [not found]         ` <53EB7831.4080306-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2014-08-13 15:02           ` Matt Fleming
2014-08-13 15:02             ` Matt Fleming
     [not found]             ` <20140813150201.GT15082-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-08-13 23:31               ` Theodore Ts'o
2014-08-13 23:31                 ` Theodore Ts'o
2014-08-13 14:44       ` Peter Zijlstra
2014-08-13 14:44         ` Peter Zijlstra

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