linux-kernel - [PATCH v6] acpi: apei: remove the unused dead-code for SEA/NMI notification type

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20171021100410.23338-1-gengdongjiu@huawei.com>
Date:   Sat, 21 Oct 2017 18:04:10 +0800
From:   Dongjiu Geng <gengdongjiu@...wei.com>
To:     <rjw@...ysocki.net>, <lenb@...nel.org>, <tbaicar@...eaurora.org>,
        <will.deacon@....com>, <bp@...e.de>, <prarit@...hat.com>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <huangshaoyu@...wei.com>, <gengdongjiu@...wei.com>
Subject: [PATCH v6] acpi: apei: remove the unused dead-code for SEA/NMI notification type

For the SEA notification, the two functions ghes_sea_add() and
ghes_sea_remove() are only called when CONFIG_ACPI_APEI_SEA
is defined. If not, it will return errors in the ghes_probe()
and not continue. If the probe is failed, the ghes_sea_remove()
also has no chance to be called. Hence, remove the unnecessary
handling when CONFIG_ACPI_APEI_SEA is not defined.

For the NMI notification, it has the same issue as SEA notification,
so also remove the unused dead-code for it.

Cc: Tyler Baicar <tbaicar@...eaurora.org>
Cc: James Morse <james.morse@....com>
Signed-off-by: Dongjiu Geng <gengdongjiu@...wei.com>
Tested-by: Tyler Baicar <tbaicar@...eaurora.org>
Signed-off-by: Borislav Petkov <bp@...e.de>
---
 drivers/acpi/apei/ghes.c | 33 +++++----------------------------
 1 file changed, 5 insertions(+), 28 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index d661d45..3eee30a 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -849,17 +849,8 @@ static void ghes_sea_remove(struct ghes *ghes)
 	synchronize_rcu();
 }
 #else /* CONFIG_ACPI_APEI_SEA */
-static inline void ghes_sea_add(struct ghes *ghes)
-{
-	pr_err(GHES_PFX "ID: %d, trying to add SEA notification which is not supported\n",
-	       ghes->generic->header.source_id);
-}
-
-static inline void ghes_sea_remove(struct ghes *ghes)
-{
-	pr_err(GHES_PFX "ID: %d, trying to remove SEA notification which is not supported\n",
-	       ghes->generic->header.source_id);
-}
+static inline void ghes_sea_add(struct ghes *ghes) { }
+static inline void ghes_sea_remove(struct ghes *ghes) { }
 #endif /* CONFIG_ACPI_APEI_SEA */
 
 #ifdef CONFIG_HAVE_ACPI_APEI_NMI
@@ -1061,23 +1052,9 @@ static void ghes_nmi_init_cxt(void)
 	init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq);
 }
 #else /* CONFIG_HAVE_ACPI_APEI_NMI */
-static inline void ghes_nmi_add(struct ghes *ghes)
-{
-	pr_err(GHES_PFX "ID: %d, trying to add NMI notification which is not supported!\n",
-	       ghes->generic->header.source_id);
-	BUG();
-}
-
-static inline void ghes_nmi_remove(struct ghes *ghes)
-{
-	pr_err(GHES_PFX "ID: %d, trying to remove NMI notification which is not supported!\n",
-	       ghes->generic->header.source_id);
-	BUG();
-}
-
-static inline void ghes_nmi_init_cxt(void)
-{
-}
+static inline void ghes_nmi_add(struct ghes *ghes) { }
+static inline void ghes_nmi_remove(struct ghes *ghes) { }
+static inline void ghes_nmi_init_cxt(void) { }
 #endif /* CONFIG_HAVE_ACPI_APEI_NMI */
 
 static int ghes_probe(struct platform_device *ghes_dev)
-- 
2.10.1