linux-kernel - [PATCH v7 3/3] x86/cacheinfo: Clean out init_cache

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Message-Id: <20240913083155.9783-4-ricardo.neri-calderon@linux.intel.com>
Date: Fri, 13 Sep 2024 01:31:55 -0700
From: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To: x86@...nel.org
Cc: Andreas Herrmann <aherrmann@...e.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Chen Yu <yu.c.chen@...el.com>,
	Len Brown <len.brown@...el.com>,
	Radu Rendec <rrendec@...hat.com>,
	Pierre Gondois <Pierre.Gondois@....com>,
	Pu Wen <puwen@...on.cn>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Will Deacon <will@...nel.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Nikolay Borisov <nik.borisov@...e.com>,
	Huang Ying <ying.huang@...el.com>,
	Ricardo Neri <ricardo.neri@...el.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v7 3/3] x86/cacheinfo: Clean out init_cache_level()

init_cache_level() no longer has a purpose on x86. It no longer needs to
set num_leaves, and it never had to set num_levels, which was unnecessary
on x86.

Replace it with "return 0" simply to override the weak function, which
would return an error.

Reviewed-by: Andreas Herrmann <aherrmann@...e.de>
Reviewed-by: Len Brown <len.brown@...el.com>
Reviewed-by: Nikolay Borisov <nik.borisov@...e.com>
Tested-by: Andreas Herrmann <aherrmann@...e.de>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
---
Cc: Andreas Herrmann <aherrmann@...e.com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Chen Yu <yu.c.chen@...el.com>
CC: Huang Ying <ying.huang@...el.com>
Cc: Len Brown <len.brown@...el.com>
Cc: Nikolay Borisov <nik.borisov@...e.com>
Cc: Radu Rendec <rrendec@...hat.com>
Cc: Pierre Gondois <Pierre.Gondois@....com>
Cc: Pu Wen <puwen@...on.cn>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc: Sudeep Holla <sudeep.holla@....com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc: Will Deacon <will@...nel.org>
Cc: Zhang Rui <rui.zhang@...el.com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: stable@...r.kernel.org # 6.3+
---
Changes since v5:
 * Added Reviewed-by tag from Nikolay and Andreas. Thanks!

Changes since v4:
 * None

Changes since v3:
 * Rebased on v6.7-rc5.

Changes since v2:
 * None

Changes since v1:
 * Introduced this patch.
---
 arch/x86/kernel/cpu/cacheinfo.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index 182cacd772b8..2a37f14cc6b1 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -1002,11 +1002,6 @@ static void ci_leaf_init(struct cacheinfo *this_leaf,
 
 int init_cache_level(unsigned int cpu)
 {
-	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
-
-	if (!this_cpu_ci)
-		return -EINVAL;
-	this_cpu_ci->num_levels = 3;
 	return 0;
 }
 
-- 
2.34.1