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Commit 0ca0d818 authored by Zhang Yanfei's avatar Zhang Yanfei Committed by Marcelo Tosatti
Browse files

x86/kexec: crash_vmclear_local_vmcss needs __rcu 



This removes the sparse warning:
arch/x86/kernel/crash.c:49:32: sparse: incompatible types in comparison expression (different address spaces)

Reported-by: default avatarkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: default avatarZhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 49f8a1a5

arch/x86/include/asm/kexec.h

+2 −1
Original line number Diff line number Diff line
@@ -163,7 +163,8 @@ struct kimage_arch { 
};

#endif



extern void (*crash_vmclear_loaded_vmcss)(void);

typedef void crash_vmclear_fn(void);

extern crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss;



#endif /* __ASSEMBLY__ */

arch/x86/kernel/crash.c

+2 −2
Original line number Diff line number Diff line
@@ -38,12 +38,12 @@ int in_crash_kexec; 
 *

 * protected by rcu.

 */

void (*crash_vmclear_loaded_vmcss)(void) = NULL;

crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss = NULL;

EXPORT_SYMBOL_GPL(crash_vmclear_loaded_vmcss);



static inline void cpu_crash_vmclear_loaded_vmcss(void)

{

	void (*do_vmclear_operation)(void) = NULL;

	crash_vmclear_fn *do_vmclear_operation = NULL;



	rcu_read_lock();

	do_vmclear_operation = rcu_dereference(crash_vmclear_loaded_vmcss);