linux-kernel - [PATCH v4 2/5] arm64: kasan: abstract _text and _end to KERNEL

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Date:   Wed, 24 Mar 2021 12:05:19 +0800
From:   Lecopzer Chen <lecopzer.chen@...iatek.com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kasan-dev@...glegroups.com>,
        <catalin.marinas@....com>, <will@...nel.org>
CC:     <ryabinin.a.a@...il.com>, <glider@...gle.com>,
        <andreyknvl@...il.com>, <dvyukov@...gle.com>,
        <akpm@...ux-foundation.org>, <tyhicks@...ux.microsoft.com>,
        <maz@...nel.org>, <rppt@...nel.org>, <linux@...ck-us.net>,
        <gustavoars@...nel.org>, <yj.chiang@...iatek.com>,
        Lecopzer Chen <lecopzer.chen@...iatek.com>
Subject: [PATCH v4 2/5] arm64: kasan: abstract _text and _end to KERNEL_START/END

Arm64 provides defined macro for KERNEL_START and KERNEL_END,
thus replace them by the abstration instead of using _text and _end.

Signed-off-by: Lecopzer Chen <lecopzer.chen@...iatek.com>
Acked-by: Andrey Konovalov <andreyknvl@...il.com>
Tested-by: Andrey Konovalov <andreyknvl@...il.com>
Tested-by: Ard Biesheuvel <ardb@...nel.org>
---
 arch/arm64/mm/kasan_init.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c
index 20d06008785f..cd2653b7b174 100644
--- a/arch/arm64/mm/kasan_init.c
+++ b/arch/arm64/mm/kasan_init.c
@@ -218,8 +218,8 @@ static void __init kasan_init_shadow(void)
 	phys_addr_t pa_start, pa_end;
 	u64 i;
 
-	kimg_shadow_start = (u64)kasan_mem_to_shadow(_text) & PAGE_MASK;
-	kimg_shadow_end = PAGE_ALIGN((u64)kasan_mem_to_shadow(_end));
+	kimg_shadow_start = (u64)kasan_mem_to_shadow(KERNEL_START) & PAGE_MASK;
+	kimg_shadow_end = PAGE_ALIGN((u64)kasan_mem_to_shadow(KERNEL_END));
 
 	mod_shadow_start = (u64)kasan_mem_to_shadow((void *)MODULES_VADDR);
 	mod_shadow_end = (u64)kasan_mem_to_shadow((void *)MODULES_END);
@@ -240,7 +240,7 @@ static void __init kasan_init_shadow(void)
 	clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END);
 
 	kasan_map_populate(kimg_shadow_start, kimg_shadow_end,
-			   early_pfn_to_nid(virt_to_pfn(lm_alias(_text))));
+			   early_pfn_to_nid(virt_to_pfn(lm_alias(KERNEL_START))));
 
 	kasan_populate_early_shadow(kasan_mem_to_shadow((void *)PAGE_END),
 				   (void *)mod_shadow_start);
-- 
2.25.1