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Subject[PATCH 03/46] kernel: Move prototype declaration to header file include/linux/cpu.h
Add prototype declaration to header file include/linux/cpu.h because
they are used by more than one file.

This eliminates the following warning in kernel/cpu.c:
kernel/cpu.c:512:13: warning: no previous prototype for ‘arch_enable_nonboot_cpus_begin’ [-Wmissing-prototypes]
kernel/cpu.c:516:13: warning: no previous prototype for ‘arch_enable_nonboot_cpus_end’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <>
Reviewed-by: Josh Triplett <>
arch/x86/kernel/smpboot.c | 1 +
include/linux/cpu.h | 2 ++
2 files changed, 3 insertions(+)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a32da80..e428764 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -49,6 +49,7 @@
#include <linux/bootmem.h>
#include <linux/err.h>
#include <linux/nmi.h>
+#include <linux/cpu.h>
#include <linux/tboot.h>
#include <linux/stackprotector.h>
#include <linux/gfp.h>
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 03e235ad..9f633b0 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -38,6 +38,8 @@ extern void cpu_remove_dev_attr(struct device_attribute *attr);

extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
+void arch_enable_nonboot_cpus_begin(void);
+void arch_enable_nonboot_cpus_end(void);

extern void unregister_cpu(struct cpu *cpu);
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