linux-kernel - [PATCH v3 1/4] x86/mm: declare check_la57

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Date:   Sun, 28 Oct 2018 13:09:42 +0000
From:   Changbin Du <changbin.du@...il.com>
To:     yamada.masahiro@...ionext.com, michal.lkml@...kovi.net,
        tglx@...utronix.de, mingo@...hat.com, linux@...linux.org.uk,
        akpm@...ux-foundation.org, gregkh@...uxfoundation.org
Cc:     rostedt@...dmis.org, x86@...nel.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sparse@...r.kernel.org, robin.murphy@....com,
        Changbin Du <changbin.du@...il.com>
Subject: [PATCH v3 1/4] x86/mm: declare check_la57_support() as inline

The level4_kernel_pgt is only defined when X86_5LEVEL is enabled.
So declare check_la57_support() as inline to make sure the code
referring to level4_kernel_pgt is optimized out. This is a preparation
for CONFIG_CC_OPTIMIZE_FOR_DEBUGGING.

Signed-off-by: Changbin Du <changbin.du@...il.com>
Cc: Steven Rostedt (VMware) <rostedt@...dmis.org>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
---
 arch/x86/kernel/head64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 5dc377dc9d7b..5ae682f2aa83 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -98,7 +98,7 @@ static bool __head check_la57_support(unsigned long physaddr)
 	return true;
 }
 #else
-static bool __head check_la57_support(unsigned long physaddr)
+static inline bool __head check_la57_support(unsigned long physaddr)
 {
 	return false;
 }
-- 
2.17.1