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From: "Tiezhu Yang" <kernelpatch@126.com>
To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
	kexec@lists.infradead.org, vgoyal@redhat.com
Subject: [PATCH v2 RESEND] kexec: fix warnig of crash_zero_bytes in crash.c
Date: Mon, 24 Jun 2019 12:41:18 +0800 (CST)	[thread overview]
Message-ID: <117ef0c6.3d30.16b87c9cfbf.Coremail.kernelpatch@126.com> (raw)

Fix the following sparse warning:

arch/x86/kernel/crash.c:59:15:
warning: symbol 'crash_zero_bytes' was not declared. Should it be static?

First, make crash_zero_bytes static. In addition, crash_zero_bytes
is used when CONFIG_KEXEC_FILE is set, so make it only available
under CONFIG_KEXEC_FILE. Otherwise, if CONFIG_KEXEC_FILE is not set,
the following warning will appear when make crash_zero_bytes static:

arch/x86/kernel/crash.c:59:22:
warning: ‘crash_zero_bytes’ defined but not used [-Wunused-variable]

Fixes: dd5f726076cc ("kexec: support for kexec on panic using new system call")
Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org
---
 arch/x86/kernel/crash.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 576b2e1..f13480e 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -56,7 +56,9 @@ struct crash_memmap_data {
  */
 crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss = NULL;
 EXPORT_SYMBOL_GPL(crash_vmclear_loaded_vmcss);
-unsigned long crash_zero_bytes;
+#ifdef CONFIG_KEXEC_FILE
+static unsigned long crash_zero_bytes;
+#endif
 
 static inline void cpu_crash_vmclear_loaded_vmcss(void)
 {
-- 
1.8.3.1

             reply	other threads:[~2019-06-24  4:42 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-24  4:41 Tiezhu Yang [this message]
2019-06-26 14:07 ` [tip:x86/cleanups] x86/kexec: Make variable static and config dependent tip-bot for Tiezhu Yang

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