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Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two callbacks

From Borislav Petkov <bp@alien8.de>
Newsgroups linux.kernel
Subject Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two callbacks
Date 2016-11-07 19:20 +0100
Message-ID <sAWGu-6RG-23@gated-at.bofh.it> (permalink)
References (1 earlier) <szrEQ-5cN-69@gated-at.bofh.it> <sAS9Q-3GK-9@gated-at.bofh.it> <sAS9Q-3GK-23@gated-at.bofh.it> <sATIB-4Mo-11@gated-at.bofh.it> <sAVU5-6hX-7@gated-at.bofh.it>
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On Mon, Nov 07, 2016 at 06:26:17PM +0100, Sebastian Andrzej Siewior wrote:
> Subject: x86/mcheck: Split threshold_cpu_callback into two callbacks
> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Date: Tue, 25 Oct 2016 18:04:25 +0200
> 
> The threshold_cpu_callback callbacks looks like one of the notifier and
> its arguments are almost the same. Split this out and have one ONLINE
> and one DEAD callback. This will come handy later once the main code
> gets changed to use the callback mechanism.
> Also, handle threshold_cpu_callback_online() return value so we don't
> continue if the function fails.
> 
> Boris Petkov removed the callback pointer and replaced it with proper
> functions.
> 
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: linux-edac@vger.kernel.org
> Cc: x86@kernel.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> --- a/arch/x86/include/asm/mce.h
> +++ b/arch/x86/include/asm/mce.h
> @@ -293,9 +293,7 @@ void do_machine_check(struct pt_regs *,
>  /*
>   * Threshold handler
>   */
> -
>  extern void (*mce_threshold_vector)(void);
> -extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
>  
>  /* Deferred error interrupt handler */
>  extern void (*deferred_error_int_vector)(void);
> @@ -377,7 +375,12 @@ struct smca_bank_info {
>  };
>  
>  extern struct smca_bank_info smca_banks[MAX_NR_BANKS];
> +extern int mce_threshold_create_device(unsigned int cpu);
> +extern int mce_threshold_remove_device(unsigned int cpu);
> +#else
>  
> +static inline int mce_threshold_create_device(unsigned int cpu) { return 0; };
> +static inline int mce_threshold_remove_device(unsigned int cpu) { return 0; };
>  #endif
>  
>  #endif /* _ASM_X86_MCE_H */

Right, just a heads-up for tip guys: this second hunk will cause a merge
conflict with the other RAS changes:

Applying patch 21-x86-mcheck-split_threshold_cpu_callback_into_two_callbacks.patch
patching file arch/x86/include/asm/mce.h
Hunk #1 succeeded at 292 (offset -1 lines).
Hunk #2 FAILED at 375.
1 out of 2 hunks FAILED -- saving rejects to file arch/x86/include/asm/mce.h.rej

The fixup is easy though as it is only a contextual conflict due to
renaming of smca_bank_info to smca_bank:

Index: b/arch/x86/include/asm/mce.h
===================================================================
--- a/arch/x86/include/asm/mce.h        2016-11-07 19:12:14.309920731 +0100
+++ b/arch/x86/include/asm/mce.h        2016-11-07 19:13:47.521922219 +0100
@@ -292,9 +292,7 @@ void do_machine_check(struct pt_regs *,
 /*
  * Threshold handler
  */
-
 extern void (*mce_threshold_vector)(void);
-extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
 
 /* Deferred error interrupt handler */
 extern void (*deferred_error_int_vector)(void);
@@ -372,6 +370,11 @@ struct smca_bank {
 extern struct smca_bank smca_banks[MAX_NR_BANKS];
 
 extern const char *smca_get_long_name(enum smca_bank_types t);
+extern int mce_threshold_create_device(unsigned int cpu);
+extern int mce_threshold_remove_device(unsigned int cpu);
+#else
+static inline int mce_threshold_create_device(unsigned int cpu) { return 0; };
+static inline int mce_threshold_remove_device(unsigned int cpu) { return 0; };
 #endif
 
 #endif /* _ASM_X86_MCE_H */
---

Thanks!

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

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Thread

cpu hotplug: convert more drivers (batch #4) Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
  [PATCH 04/25] lib/percpu_counter: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] lib/percpu_counter: Convert to hotplug state  machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 10/25] s390/smp: Make cpu notifier symetric Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    Re: [PATCH 10/25] s390/smp: Make cpu notifier symetric Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-11-04 15:30 +0100
      [PATCH 10/25 v2] s390/smp: Make cpu notifier symetric Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-04 15:50 +0100
        [tip:smp/hotplug] s390/smp: Make cpu notifier symetric tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 11/25] s390/smp: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    Re: [PATCH 11/25] s390/smp: Convert to hotplug state machine Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-11-04 15:40 +0100
      [PATCH 11/25 v2] s390/smp: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-04 15:50 +0100
        [tip:smp/hotplug] s390/smp: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 25/25] x86/mcheck: Move CPU_DEAD to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
  [PATCH 14/25] ia64/err-inject: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] ia64/err-inject: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 05/25] lib/radix-tree: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] lib/radix-tree: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 23/25] x86/mcheck: Make CPU_DOWN_PREPARE the counter part of CPU_STARTING Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
  [PATCH 02/25] kernel/printk: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] kernel/printk: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 06/25] mm/page_alloc: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] mm/page_alloc: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 18/25] x86/mcheck: Move threshold_create_device() Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    Re: [PATCH 18/25] x86/mcheck: Move threshold_create_device() Borislav Petkov <bp@alien8.de> - 2016-11-07 11:40 +0100
  [PATCH 09/25] net/flowcache: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] net/flowcache: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two  callbacks Borislav Petkov <bp@alien8.de> - 2016-11-07 14:30 +0100
      Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two  callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-07 14:30 +0100
        Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two  callbacks Borislav Petkov <bp@alien8.de> - 2016-11-07 16:10 +0100
          Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two  callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-07 16:20 +0100
          Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two  callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-07 18:30 +0100
            Re: [PATCH 21/25] x86/mcheck: Split threshold_cpu_callback into two  callbacks Borislav Petkov <bp@alien8.de> - 2016-11-07 19:20 +0100
  [PATCH 08/25] net/dev: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [tip:smp/hotplug] net/dev: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:00 +0100
  [PATCH 17/25] ia64/topology: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
    [PATCH 17/25 v2] ia64/topology: Convert to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 18:40 +0100
      [tip:smp/hotplug] ia64/topology: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com> - 2016-11-10 00:10 +0100

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