Commit-ID: eef4dfa0cb83899c782935ac5345532f47073cea Gitweb: http://git.kernel.org/tip/eef4dfa0cb83899c782935ac5345532f47073cea Author: Borislav Petkov <b...@suse.de> AuthorDate: Wed, 12 Aug 2015 18:29:38 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 13 Aug 2015 10:12:52 +0200
x86/mce: Kill drain_mcelog_buffer() This used to flush out MCEs logged during early boot and which were in the MCA registers from a previous system run. No need for that now, since we've moved to a genpool. Suggested-by: Tony Luck <tony.l...@intel.com> Signed-off-by: Borislav Petkov <b...@suse.de> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/1439396985-12812-7-git-send-email...@alien8.de Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/mce.h | 2 +- arch/x86/kernel/cpu/mcheck/mce.c | 44 ++-------------------------------------- drivers/acpi/acpi_extlog.c | 2 +- drivers/edac/i7core_edac.c | 2 +- drivers/edac/mce_amd.c | 2 +- drivers/edac/sb_edac.c | 2 +- 6 files changed, 7 insertions(+), 47 deletions(-) diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index dfaa4de..982dfc3 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -140,7 +140,7 @@ struct mce_vendor_flags { extern struct mce_vendor_flags mce_flags; extern struct mca_config mca_cfg; -extern void mce_register_decode_chain(struct notifier_block *nb, bool drain); +extern void mce_register_decode_chain(struct notifier_block *nb); extern void mce_unregister_decode_chain(struct notifier_block *nb); #include <linux/percpu.h> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 9568bb5..32b586e 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -199,55 +199,15 @@ void mce_log(struct mce *mce) set_bit(0, &mce_need_notify); } -static void drain_mcelog_buffer(void) -{ - unsigned int next, i, prev = 0; - - next = ACCESS_ONCE(mcelog.next); - - do { - struct mce *m; - - /* drain what was logged during boot */ - for (i = prev; i < next; i++) { - unsigned long start = jiffies; - unsigned retries = 1; - - m = &mcelog.entry[i]; - - while (!m->finished) { - if (time_after_eq(jiffies, start + 2*retries)) - retries++; - - cpu_relax(); - - if (!m->finished && retries >= 4) { - pr_err("skipping error being logged currently!\n"); - break; - } - } - smp_rmb(); - atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, m); - } - - memset(mcelog.entry + prev, 0, (next - prev) * sizeof(*m)); - prev = next; - next = cmpxchg(&mcelog.next, prev, 0); - } while (next != prev); -} - static struct notifier_block mce_srao_nb; -void mce_register_decode_chain(struct notifier_block *nb, bool drain) +void mce_register_decode_chain(struct notifier_block *nb) { /* Ensure SRAO notifier has the highest priority in the decode chain. */ if (nb != &mce_srao_nb && nb->priority == INT_MAX) nb->priority -= 1; atomic_notifier_chain_register(&x86_mce_decoder_chain, nb); - - if (drain) - drain_mcelog_buffer(); } EXPORT_SYMBOL_GPL(mce_register_decode_chain); @@ -2028,7 +1988,7 @@ __setup("mce", mcheck_enable); int __init mcheck_init(void) { mcheck_intel_therm_init(); - mce_register_decode_chain(&mce_srao_nb, false); + mce_register_decode_chain(&mce_srao_nb); mcheck_vendor_init_severity(); INIT_WORK(&mce_work, mce_process_work); diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c index 07e012e..b3842ff 100644 --- a/drivers/acpi/acpi_extlog.c +++ b/drivers/acpi/acpi_extlog.c @@ -286,7 +286,7 @@ static int __init extlog_init(void) */ old_edac_report_status = get_edac_report_status(); set_edac_report_status(EDAC_REPORTING_DISABLED); - mce_register_decode_chain(&extlog_mce_dec, true); + mce_register_decode_chain(&extlog_mce_dec); /* enable OS to be involved to take over management from BIOS */ ((struct extlog_l1_head *)extlog_l1_addr)->flags |= FLAG_OS_OPTIN; diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c index 13d77f4..01087a3 100644 --- a/drivers/edac/i7core_edac.c +++ b/drivers/edac/i7core_edac.c @@ -2424,7 +2424,7 @@ static int __init i7core_init(void) pci_rc = pci_register_driver(&i7core_driver); if (pci_rc >= 0) { - mce_register_decode_chain(&i7_mce_dec, true); + mce_register_decode_chain(&i7_mce_dec); return 0; } diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c index aca31a2..58586d5 100644 --- a/drivers/edac/mce_amd.c +++ b/drivers/edac/mce_amd.c @@ -895,7 +895,7 @@ static int __init mce_amd_init(void) pr_info("MCE: In-kernel MCE decoding enabled.\n"); - mce_register_decode_chain(&amd_mce_dec_nb, true); + mce_register_decode_chain(&amd_mce_dec_nb); return 0; } diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c index 5780e26..ca78311 100644 --- a/drivers/edac/sb_edac.c +++ b/drivers/edac/sb_edac.c @@ -2591,7 +2591,7 @@ static int __init sbridge_init(void) pci_rc = pci_register_driver(&sbridge_driver); if (pci_rc >= 0) { - mce_register_decode_chain(&sbridge_mce_dec, true); + mce_register_decode_chain(&sbridge_mce_dec); if (get_edac_report_status() == EDAC_REPORTING_DISABLED) sbridge_printk(KERN_WARNING, "Loading driver, error reporting disabled.\n"); return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
