linux-kernel - [PATCH v3 3/7] drivers/acpi: convert seqno to use seqnum

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Date:   Wed,  3 Feb 2021 11:11:59 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     corbet@....net, gregkh@...uxfoundation.org, peterz@...radead.org,
        keescook@...omium.org, rafael@...nel.org, lenb@...nel.org,
        james.morse@....com, tony.luck@...el.com, bp@...en8.de
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kselftest@...r.kernel.org,
        devel@...verdev.osuosl.org
Subject: [PATCH v3 3/7] drivers/acpi: convert seqno to use seqnum_ops

Sequence Number api provides interfaces for unsigned atomic up counters
leveraging atomic_t and atomic64_t ops underneath.

Convert seqno atomic counter to use seqnum_ops.

Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 drivers/acpi/acpi_extlog.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index 72f1fb77abcd..16a4928645a1 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -12,6 +12,7 @@
 #include <linux/ratelimit.h>
 #include <linux/edac.h>
 #include <linux/ras.h>
+#include <linux/seqnum_ops.h>
 #include <asm/cpu.h>
 #include <asm/mce.h>
 
@@ -93,8 +94,7 @@ static struct acpi_hest_generic_status *extlog_elog_entry_check(int cpu, int ban
 static void __print_extlog_rcd(const char *pfx,
 			       struct acpi_hest_generic_status *estatus, int cpu)
 {
-	static atomic_t seqno;
-	unsigned int curr_seqno;
+	static struct seqnum32 seqno;
 	char pfx_seq[64];
 
 	if (!pfx) {
@@ -103,8 +103,8 @@ static void __print_extlog_rcd(const char *pfx,
 		else
 			pfx = KERN_ERR;
 	}
-	curr_seqno = atomic_inc_return(&seqno);
-	snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}", pfx, curr_seqno);
+	snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}", pfx,
+		 seqnum32_inc(&seqno));
 	printk("%s""Hardware error detected on CPU%d\n", pfx_seq, cpu);
 	cper_estatus_print(pfx_seq, estatus);
 }
-- 
2.27.0