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x86/kexec: Make variable static and config dependent

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The following sparse warning is emitted:

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

The variable is only used in this compilation unit, but it is also only
used when CONFIG_KEXEC_FILE is enabled. Just making it static would result
in a 'defined but not used' warning for CONFIG_KEXEC_FILE=n.

Make it static and move it into the existing CONFIG_KEXEC_FILE section.

[ tglx: Massaged changelog and moved it into the existing ifdef ]

Fixes: dd5f726076 ("kexec: support for kexec on panic using new system call")
Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: bp@alien8.de
Cc: hpa@zytor.com
Cc: kexec@lists.infradead.org
Cc: vgoyal@redhat.com
Cc: Vivek Goyal <vgoyal@redhat.com>
Link: https://lkml.kernel.org/r/117ef0c6.3d30.16b87c9cfbf.Coremail.kernelpatch@126.com
This commit is contained in:
Tiezhu Yang 2019-06-24 12:41:18 +08:00 committed by Thomas Gleixner
parent 166da5c546
commit 53b7607382
1 changed files with 3 additions and 1 deletions
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4
arch/x86/kernel/crash.c
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@ -56,7 +56,6 @@ 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;
static inline void cpu_crash_vmclear_loaded_vmcss(void)
{
@ -181,6 +180,9 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
}
#ifdef CONFIG_KEXEC_FILE
static unsigned long crash_zero_bytes;
static int get_nr_ram_ranges_callback(struct resource *res, void *arg)
{
unsigned int *nr_ranges = arg;