In Linux code we add a guard macro to avoid multiple declarations of identifiers.
But I see some macros defined with trailing underscores.
e.g. In arch/x86/include/asm/
Normally it is defined like,
#ifndef _ASM_X86_ALTERNATIVE_H
#define _ASM_X86_ALTERNATIVE_H
But in some files I see trailing underscore after H ,
e.g. arch/x86/include/asm/intel_scu_ipc.h
#ifndef _ASM_X86_INTEL_SCU_IPC_H_
#define _ASM_X86_INTEL_SCU_IPC_H_
There are others files also
arch/x86/include/asm/irqflags.h
DOES THIS TRAILING UNDERSCORE HAS SPECIAL MEANING ???
Thanks
-- Pritam Bankar
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