linux-kernel - [PATCH v2 2/3] powerpc: Stop using init_mem_is

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Message-Id: <4abb3611309bf7b31520d990f426e5941b562b67.1632558672.git.christophe.leroy@csgroup.eu>
Date:   Sat, 25 Sep 2021 10:31:43 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Michael Neuling <mikey@...ling.org>
Subject: [PATCH v2 2/3] powerpc: Stop using init_mem_is_free

Generic parts of the kernel for instance core_kernel_text()
use 'system_state' to check whether init memory has been
freed.

Do the same and stop using init_mem_is_free.

Cc: Michael Neuling <mikey@...ling.org>
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
arch_is_kernel_initmem_freed() is likely going to go away via the mm tree, in that case this patch will void.

v2: Also remove declaration of init_mem_is_free.
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/sections.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/sections.h b/arch/powerpc/include/asm/sections.h
index 6e4af4492a14..454b8434bfc4 100644
--- a/arch/powerpc/include/asm/sections.h
+++ b/arch/powerpc/include/asm/sections.h
@@ -10,11 +10,9 @@
 
 #include <asm-generic/sections.h>
 
-extern bool init_mem_is_free;
-
 static inline int arch_is_kernel_initmem_freed(unsigned long addr)
 {
-	if (!init_mem_is_free)
+	if (system_state < SYSTEM_RUNNING)
 		return 0;
 
 	return addr >= (unsigned long)__init_begin &&
-- 
2.31.1