linux-kernel - [PATCH 6.1 4/6] ACPI: PPTT: Remove acpi_find_cache

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Message-Id: <bea1cab6fdff72bc703c40621de8a0b1744f61a6.1759251543.git.wen.yang@linux.dev>
Date: Wed,  1 Oct 2025 01:27:29 +0800
From: Wen Yang <wen.yang@...ux.dev>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pierre Gondois <pierre.gondois@....com>,
	Jeremy Linton <jeremy.linton@....com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Palmer Dabbelt <palmer@...osinc.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Wen Yang <wen.yang@...ux.dev>
Subject: [PATCH 6.1 4/6] ACPI: PPTT: Remove acpi_find_cache_levels()

From: Pierre Gondois <pierre.gondois@....com>

[ Upstream commit fa4d566a605bc4cf32d69f16ef8cf9696635f75a ]
acpi_find_cache_levels() is used at a single place and is short
enough to be merged into the calling function. The removal allows
an easier renaming of the calling function in the next patch.

Also reorder the local variables in the 'reversed Christmas tree'
order.

Signed-off-by: Pierre Gondois <pierre.gondois@....com>
Reviewed-by: Jeremy Linton <jeremy.linton@....com>
Acked-by: Rafael J. Wysocki  <rafael.j.wysocki@...el.com>
Acked-by: Palmer Dabbelt <palmer@...osinc.com>
Link: https://lore.kernel.org/r/20230104183033.755668-5-pierre.gondois@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Wen Yang <wen.yang@...ux.dev>
---
 drivers/acpi/pptt.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index 1938e4778725..01aae0f203b0 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c
@@ -286,19 +286,6 @@ static struct acpi_pptt_processor *acpi_find_processor_node(struct acpi_table_he
 	return NULL;
 }
 
-static int acpi_find_cache_levels(struct acpi_table_header *table_hdr,
-				  u32 acpi_cpu_id)
-{
-	int number_of_levels = 0;
-	struct acpi_pptt_processor *cpu;
-
-	cpu = acpi_find_processor_node(table_hdr, acpi_cpu_id);
-	if (cpu)
-		number_of_levels = acpi_count_levels(table_hdr, cpu);
-
-	return number_of_levels;
-}
-
 static u8 acpi_cache_type(enum cache_type type)
 {
 	switch (type) {
@@ -621,9 +608,10 @@ static int check_acpi_cpu_flag(unsigned int cpu, int rev, u32 flag)
  */
 int acpi_find_last_cache_level(unsigned int cpu)
 {
-	u32 acpi_cpu_id;
+	struct acpi_pptt_processor *cpu_node;
 	struct acpi_table_header *table;
 	int number_of_levels = 0;
+	u32 acpi_cpu_id;
 
 	table = acpi_get_pptt();
 	if (!table)
@@ -632,7 +620,10 @@ int acpi_find_last_cache_level(unsigned int cpu)
 	pr_debug("Cache Setup find last level CPU=%d\n", cpu);
 
 	acpi_cpu_id = get_acpi_id_for_cpu(cpu);
-	number_of_levels = acpi_find_cache_levels(table, acpi_cpu_id);
+	cpu_node = acpi_find_processor_node(table, acpi_cpu_id);
+	if (cpu_node)
+		number_of_levels = acpi_count_levels(table, cpu_node);
+
 	pr_debug("Cache Setup find last level level=%d\n", number_of_levels);
 
 	return number_of_levels;
-- 
2.25.1