linux-kernel - [PATCH 2/4] arch/powerpc: remove kasan_arch_is

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Message-ID: <20250812130933.71593-3-bhe@redhat.com>
Date: Tue, 12 Aug 2025 21:09:31 +0800
From: Baoquan He <bhe@...hat.com>
To: linux-mm@...ck.org
Cc: snovitoll@...il.com,
	ryabinin.a.a@...il.com,
	christophe.leroy@...roup.eu,
	hca@...ux.ibm.com,
	andreyknvl@...il.com,
	akpm@...ux-foundation.org,
	chenhuacai@...ngson.cn,
	davidgow@...gle.com,
	glider@...gle.com,
	dvyukov@...gle.com,
	alexghiti@...osinc.com,
	kasan-dev@...glegroups.com,
	loongarch@...ts.linux.dev,
	linuxppc-dev@...ts.ozlabs.org,
	linux-um@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	agordeev@...ux.ibm.com,
	Baoquan He <bhe@...hat.com>
Subject: [PATCH 2/4] arch/powerpc: remove kasan_arch_is_ready()

From: Sabyrzhan Tasbolatov <snovitoll@...il.com>

With the help of static key kasan_flag_enabled, kasan_arch_is_ready()
is not needed any more. So reomve the unneeded kasan_arch_is_ready() and
the relevant codes.

Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@...il.com>
Signed-off-by: Baoquan He <bhe@...hat.com>
---
 arch/powerpc/include/asm/kasan.h       | 13 -------------
 arch/powerpc/mm/kasan/init_book3s_64.c |  4 ----
 2 files changed, 17 deletions(-)

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index b5bbb94c51f6..73466d3ff302 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -53,19 +53,6 @@
 #endif
 
 #ifdef CONFIG_KASAN
-#ifdef CONFIG_PPC_BOOK3S_64
-DECLARE_STATIC_KEY_FALSE(powerpc_kasan_enabled_key);
-
-static __always_inline bool kasan_arch_is_ready(void)
-{
-	if (static_branch_likely(&powerpc_kasan_enabled_key))
-		return true;
-	return false;
-}
-
-#define kasan_arch_is_ready kasan_arch_is_ready
-#endif
-
 void kasan_early_init(void);
 void kasan_mmu_init(void);
 void kasan_init(void);
diff --git a/arch/powerpc/mm/kasan/init_book3s_64.c b/arch/powerpc/mm/kasan/init_book3s_64.c
index 9c5cf2354c8b..c1b78a9cd0a9 100644
--- a/arch/powerpc/mm/kasan/init_book3s_64.c
+++ b/arch/powerpc/mm/kasan/init_book3s_64.c
@@ -19,8 +19,6 @@
 #include <linux/memblock.h>
 #include <asm/pgalloc.h>
 
-DEFINE_STATIC_KEY_FALSE(powerpc_kasan_enabled_key);
-
 static void __init kasan_init_phys_region(void *start, void *end)
 {
 	unsigned long k_start, k_end, k_cur;
@@ -95,8 +93,6 @@ void __init kasan_init(void)
 	 */
 	memset(kasan_early_shadow_page, 0, PAGE_SIZE);
 
-	static_branch_inc(&powerpc_kasan_enabled_key);
-
 	/* KASAN is now initialized, enable it. */
 	static_branch_enable(&kasan_flag_enabled);
 
-- 
2.41.0