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Subject[PATCH 2/9] x86/mce: Rename "first" function as "early"
Date
From: Tony Luck <tony.luck@intel.com>

It isn't going to be first on the notifier chain when the CEC is moved
to be a normal user of the notifier chain.

Fix the enum for the MCE_PRIO symbols to list them in reverse order so
that the compiler can give them numbers from low to high priority. Add
an entry for MCE_PRIO_CEC as the highest priority.

[ bp: Use passive voice, add comments. ]

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200214222720.13168-2-tony.luck@intel.com
---
arch/x86/include/asm/mce.h | 16 +++++++++-------
arch/x86/kernel/cpu/mce/core.c | 10 +++++-----
2 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 83b6ddafa032..689ac6e9c65f 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -144,14 +144,16 @@ struct mce_log_buffer {
struct mce entry[];
};

+/* Highest last */
enum mce_notifier_prios {
- MCE_PRIO_FIRST = INT_MAX,
- MCE_PRIO_UC = INT_MAX - 1,
- MCE_PRIO_EXTLOG = INT_MAX - 2,
- MCE_PRIO_NFIT = INT_MAX - 3,
- MCE_PRIO_EDAC = INT_MAX - 4,
- MCE_PRIO_MCELOG = 1,
- MCE_PRIO_LOWEST = 0,
+ MCE_PRIO_LOWEST,
+ MCE_PRIO_MCELOG,
+ MCE_PRIO_EDAC,
+ MCE_PRIO_NFIT,
+ MCE_PRIO_EXTLOG,
+ MCE_PRIO_UC,
+ MCE_PRIO_EARLY,
+ MCE_PRIO_CEC
};

struct notifier_block;
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index a6009efdfe2b..43b1519ad4e5 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -559,7 +559,7 @@ static bool cec_add_mce(struct mce *m)
return false;
}

-static int mce_first_notifier(struct notifier_block *nb, unsigned long val,
+static int mce_early_notifier(struct notifier_block *nb, unsigned long val,
void *data)
{
struct mce *m = (struct mce *)data;
@@ -580,9 +580,9 @@ static int mce_first_notifier(struct notifier_block *nb, unsigned long val,
return NOTIFY_DONE;
}

-static struct notifier_block first_nb = {
- .notifier_call = mce_first_notifier,
- .priority = MCE_PRIO_FIRST,
+static struct notifier_block early_nb = {
+ .notifier_call = mce_early_notifier,
+ .priority = MCE_PRIO_EARLY,
};

static int uc_decode_notifier(struct notifier_block *nb, unsigned long val,
@@ -2041,7 +2041,7 @@ __setup("mce", mcheck_enable);
int __init mcheck_init(void)
{
mcheck_intel_therm_init();
- mce_register_decode_chain(&first_nb);
+ mce_register_decode_chain(&early_nb);
mce_register_decode_chain(&mce_uc_nb);
mce_register_decode_chain(&mce_default_nb);
mcheck_vendor_init_severity();
--
2.21.0
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