From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751340AbaHVSkO (ORCPT ); Fri, 22 Aug 2014 14:40:14 -0400 Received: from merlin.infradead.org ([205.233.59.134]:55236 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750836AbaHVSkI (ORCPT ); Fri, 22 Aug 2014 14:40:08 -0400 Message-Id: In-Reply-To: References: From: Geoff Levand Patch-Date: Wed, 20 Aug 2014 14:44:41 -0700 Subject: [PATCH 3/5] kexec: Add bit definitions for kimage entry flags To: Eric Biederman Cc: Andrew Morton , kexec@lists.infradead.org, Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Date: Fri, 22 Aug 2014 18:39:47 +0000 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Define new kexec preprocessor macros IND_*_BIT that define the bit position of the kimage entry flags. Change the existing IND_* flag macros to be defined as bit shifts of the corresponding IND_*_BIT macros. Also wrap all C language code in kexec.h with #if !defined(__ASSEMBLY__) so assembly files can include kexec.h to get the IND_* and IND_*_BIT macros. Some CPU instruction sets have tests for bit position which are convenient in implementing routines that operate on the kimage entry list. The addition of these bit position macros in a common location will avoid duplicate definitions and the chance that changes to the IND_* flags will not be propagated to assembly files. Signed-off-by: Geoff Levand --- include/linux/kexec.h | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 4b2a0e1..8c628ca 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -1,6 +1,18 @@ #ifndef LINUX_KEXEC_H #define LINUX_KEXEC_H +#define IND_DESTINATION_BIT 0 +#define IND_INDIRECTION_BIT 1 +#define IND_DONE_BIT 2 +#define IND_SOURCE_BIT 3 + +#define IND_DESTINATION (1 << IND_DESTINATION_BIT) +#define IND_INDIRECTION (1 << IND_INDIRECTION_BIT) +#define IND_DONE (1 << IND_DONE_BIT) +#define IND_SOURCE (1 << IND_SOURCE_BIT) + +#if !defined(__ASSEMBLY__) + #include #ifdef CONFIG_KEXEC @@ -64,10 +76,6 @@ */ typedef unsigned long kimage_entry_t; -#define IND_DESTINATION 0x1 -#define IND_INDIRECTION 0x2 -#define IND_DONE 0x4 -#define IND_SOURCE 0x8 struct kexec_segment { /* @@ -312,4 +320,7 @@ struct task_struct; static inline void crash_kexec(struct pt_regs *regs) { } static inline int kexec_should_crash(struct task_struct *p) { return 0; } #endif /* CONFIG_KEXEC */ + +#endif /* !defined(__ASSEBMLY__) */ + #endif /* LINUX_KEXEC_H */ -- 1.9.1