x86, mce: Add wrappers for registering on the decode chain

No functionality change, this is done so that in a follow-on patch all
queued-up MCEs can be decoded after registering on the chain.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 0e8ae57d3656c4576498b545826a5880214fe9e5..b7c47a468fdeeee8fe2d13e08dccb4adecd9dcc6 100644 (file)
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -120,7 +120,8 @@ struct mce_log {
 
 #ifdef __KERNEL__
 
-extern struct atomic_notifier_head x86_mce_decoder_chain;
+extern void mce_register_decode_chain(struct notifier_block *nb);
+extern void mce_unregister_decode_chain(struct notifier_block *nb);
 
 #include <linux/percpu.h>
 #include <linux/init.h>

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 2af127d4c3d1dc2ebdab3e0e2ff95d2d07595a46..c3c66ac6ef74e480e4dbe3f883b7ec5a5937537c 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -95,13 +95,6 @@ static DECLARE_WAIT_QUEUE_HEAD(mce_chrdev_wait);
 static DEFINE_PER_CPU(struct mce, mces_seen);
 static int                     cpu_missing;
 
-/*
- * CPU/chipset specific EDAC code can register a notifier call here to print
- * MCE errors in a human-readable form.
- */
-ATOMIC_NOTIFIER_HEAD(x86_mce_decoder_chain);
-EXPORT_SYMBOL_GPL(x86_mce_decoder_chain);
-
 /* MCA banks polled by the period polling timer for corrected events */
 DEFINE_PER_CPU(mce_banks_t, mce_poll_banks) = {
        [0 ... BITS_TO_LONGS(MAX_NR_BANKS)-1] = ~0UL
@@ -109,6 +102,12 @@ DEFINE_PER_CPU(mce_banks_t, mce_poll_banks) = {
 
 static DEFINE_PER_CPU(struct work_struct, mce_work);
 
+/*
+ * CPU/chipset specific EDAC code can register a notifier call here to print
+ * MCE errors in a human-readable form.
+ */
+ATOMIC_NOTIFIER_HEAD(x86_mce_decoder_chain);
+
 /* Do initial initialization of a struct mce */
 void mce_setup(struct mce *m)
 {
@@ -190,6 +189,18 @@ void mce_log(struct mce *mce)
        set_bit(0, &mce_need_notify);
 }
 
+void mce_register_decode_chain(struct notifier_block *nb)
+{
+       atomic_notifier_chain_register(&x86_mce_decoder_chain, nb);
+}
+EXPORT_SYMBOL_GPL(mce_register_decode_chain);
+
+void mce_unregister_decode_chain(struct notifier_block *nb)
+{
+       atomic_notifier_chain_unregister(&x86_mce_decoder_chain, nb);
+}
+EXPORT_SYMBOL_GPL(mce_unregister_decode_chain);
+
 static void print_mce(struct mce *m)
 {
        int ret = 0;

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 70ad8923f1d75d79a26c479e17e725499091a340..8568d9b618750e211c79b2d25e30827455e0d040 100644 (file)
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -2234,7 +2234,7 @@ static void i7core_unregister_mci(struct i7core_dev *i7core_dev)
        if (pvt->enable_scrub)
                disable_sdram_scrub_setting(mci);
 
-       atomic_notifier_chain_unregister(&x86_mce_decoder_chain, &i7_mce_dec);
+       mce_unregister_decode_chain(&i7_mce_dec);
 
        /* Disable EDAC polling */
        i7core_pci_ctl_release(pvt);
@@ -2336,7 +2336,7 @@ static int i7core_register_mci(struct i7core_dev *i7core_dev)
        /* DCLK for scrub rate setting */
        pvt->dclk_freq = get_dclk_freq();
 
-       atomic_notifier_chain_register(&x86_mce_decoder_chain, &i7_mce_dec);
+       mce_register_decode_chain(&i7_mce_dec);
 
        return 0;
 

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index d0864d9c38ad18b4b44026f22cd83549cd75b45c..bd926ea2e00c59278c9518ab5e5aa296e309f05a 100644 (file)
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -884,7 +884,7 @@ static int __init mce_amd_init(void)
 
        pr_info("MCE: In-kernel MCE decoding enabled.\n");
 
-       atomic_notifier_chain_register(&x86_mce_decoder_chain, &amd_mce_dec_nb);
+       mce_register_decode_chain(&amd_mce_dec_nb);
 
        return 0;
 }
@@ -893,7 +893,7 @@ early_initcall(mce_amd_init);
 #ifdef MODULE
 static void __exit mce_amd_exit(void)
 {
-       atomic_notifier_chain_unregister(&x86_mce_decoder_chain, &amd_mce_dec_nb);
+       mce_unregister_decode_chain(&amd_mce_dec_nb);
        kfree(fam_ops);
 }
 

diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 7a402bfbee7d910bacc252c0cc200285ac27af26..965bc0cc0cf6aaa286c6acbda068c9169a3edfc5 100644 (file)
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -1661,8 +1661,7 @@ static void sbridge_unregister_mci(struct sbridge_dev *sbridge_dev)
        debugf0("MC: " __FILE__ ": %s(): mci = %p, dev = %p\n",
                __func__, mci, &sbridge_dev->pdev[0]->dev);
 
-       atomic_notifier_chain_unregister(&x86_mce_decoder_chain,
-                                        &sbridge_mce_dec);
+       mce_unregister_decode_chain(&sbridge_mce_dec);
 
        /* Remove MC sysfs nodes */
        edac_mc_del_mc(mci->dev);
@@ -1731,8 +1730,7 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev)
                goto fail0;
        }
 
-       atomic_notifier_chain_register(&x86_mce_decoder_chain,
-                                      &sbridge_mce_dec);
+       mce_register_decode_chain(&sbridge_mce_dec);
        return 0;
 
 fail0: