linux-kernel - [PATCH 2/3] ACPI/GHES: Add an EDAC notifier chain

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Date:   Wed, 26 Jul 2017 10:48:26 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     linux-edac <linux-edac@...r.kernel.org>
Cc:     Tony Luck <tony.luck@...el.com>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        Toshimitsu Kani <toshi.kani@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] ACPI/GHES: Add an EDAC notifier chain

From: Borislav Petkov <bp@...e.de>

... so that GHES can dump memory errors into it and consumers like
ghes_edac can register.

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 drivers/acpi/apei/ghes.c | 14 ++++++++++++++
 include/acpi/ghes.h      |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index d661d452b238..3f05f5ff3461 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -140,6 +140,20 @@ static atomic_t ghes_estatus_cache_alloced;
 
 static int ghes_panic_timeout __read_mostly = 30;
 
+static ATOMIC_NOTIFIER_HEAD(ghes_edac_chain);
+
+void ghes_register_edac_chain(struct notifier_block *nb)
+{
+	atomic_notifier_chain_register(&ghes_edac_chain, nb);
+}
+EXPORT_SYMBOL_GPL(ghes_register_edac_chain);
+
+void ghes_unregister_edac_chain(struct notifier_block *nb)
+{
+	atomic_notifier_chain_unregister(&ghes_edac_chain, nb);
+}
+EXPORT_SYMBOL_GPL(ghes_unregister_edac_chain);
+
 static int ghes_ioremap_init(void)
 {
 	ghes_ioremap_area = __get_vm_area(PAGE_SIZE * GHES_IOREMAP_PAGES,
diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
index 9f26e01186ae..506b6a197738 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h
@@ -76,6 +76,8 @@ static inline void ghes_edac_unregister(struct ghes *ghes)
 {
 }
 #endif
+void ghes_register_edac_chain(struct notifier_block *nb);
+void ghes_unregister_edac_chain(struct notifier_block *nb);
 
 static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
 {
-- 
2.14.0.rc0