linux-kernel - [PATCH] arm64: mm: use bitmap

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Date:   Sat, 6 May 2023 16:36:31 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <broonie@...nel.org>
Cc:     <catalin.marinas@....com>, <will@...nel.org>,
        <kristina.martsenko@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm64: mm: use bitmap_zero() API

From: Ye Xingchen <ye.xingchen@....com.cn>

bitmap_zero() is faster than bitmap_clear(), so use bitmap_zero()
instead of bitmap_clear().

Signed-off-by: Ye Xingchen <ye.xingchen@....com.cn>
---
 arch/arm64/mm/context.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index e1e0dca01839..ed0bf7f8e8ce 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -95,7 +95,7 @@ static void set_reserved_asid_bits(void)
 	else if (arm64_kernel_unmapped_at_el0())
 		set_kpti_asid_bits(asid_map);
 	else
-		bitmap_clear(asid_map, 0, NUM_USER_ASIDS);
+		bitmap_zero(asid_map, NUM_USER_ASIDS);
 }

 #define asid_gen_match(asid) \
-- 
2.25.1