linux-kernel - [RFC PATCH v2 3/3] ACPI: extlog: Make print_extlog

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Date: Fri, 10 May 2024 13:21:47 +0200
From: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	Tony Luck <tony.luck@...el.com>,
	Borislav Petkov <bp@...en8.de>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-edac@...r.kernel.org,
	Dan Williams <dan.j.williams@...el.com>,
	"Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
Subject: [RFC PATCH v2 3/3] ACPI: extlog: Make print_extlog_rcd() log unconditionally

Make extlog_print_rcd() log unconditionally to report errors even if
userspace is not consuming trace events. Remove ras_userspace_consumers()
because it is not anymore used.

This change makes extlog_print() (ELOG) log consistently with ghes_proc()
(GHES).

Cc: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@...ux.intel.com>
---
 drivers/acpi/acpi_extlog.c | 6 +-----
 drivers/ras/debugfs.c      | 6 ------
 include/linux/ras.h        | 2 --
 3 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index fb7b0c73f86a..41ee66306234 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -189,10 +189,7 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
 
 	tmp = (struct acpi_hest_generic_status *)elog_buf;
 
-	if (!ras_userspace_consumers()) {
-		print_extlog_rcd(NULL, tmp, cpu);
-		goto out;
-	}
+	print_extlog_rcd(NULL, tmp, cpu);
 
 	/* log event via trace */
 	err_seq++;
@@ -225,7 +222,6 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
 		}
 	}
 
-out:
 	mce->kflags |= MCE_HANDLED_EXTLOG;
 	return NOTIFY_OK;
 }
diff --git a/drivers/ras/debugfs.c b/drivers/ras/debugfs.c
index 42afd3de68b2..6633844acdd6 100644
--- a/drivers/ras/debugfs.c
+++ b/drivers/ras/debugfs.c
@@ -13,12 +13,6 @@ struct dentry *ras_get_debugfs_root(void)
 }
 EXPORT_SYMBOL_GPL(ras_get_debugfs_root);
 
-int ras_userspace_consumers(void)
-{
-	return atomic_read(&trace_count);
-}
-EXPORT_SYMBOL_GPL(ras_userspace_consumers);
-
 static int trace_show(struct seq_file *m, void *v)
 {
 	return 0;
diff --git a/include/linux/ras.h b/include/linux/ras.h
index a64182bc72ad..98840f16b697 100644
--- a/include/linux/ras.h
+++ b/include/linux/ras.h
@@ -7,11 +7,9 @@
 #include <linux/cper.h>
 
 #ifdef CONFIG_DEBUG_FS
-int ras_userspace_consumers(void);
 void ras_debugfs_init(void);
 int ras_add_daemon_trace(void);
 #else
-static inline int ras_userspace_consumers(void) { return 0; }
 static inline void ras_debugfs_init(void) { }
 static inline int ras_add_daemon_trace(void) { return 0; }
 #endif
-- 
2.45.0