From mboxrd@z Thu Jan 1 00:00:00 1970 From: Catalin Marinas Subject: [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use Date: Wed, 11 Dec 2019 18:40:06 +0000 Message-ID: <20191211184027.20130-2-catalin.marinas@arm.com> References: <20191211184027.20130-1-catalin.marinas@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org, Richard Earnshaw , Arnd Bergmann , Szabolcs Nagy , Marc Zyngier , Kevin Brodsky , linux-mm@kvack.org, Andrey Konovalov , Vincenzo Frascino , Will Deacon , Dave Martin List-Id: linux-arch.vger.kernel.org From: Dave Martin The asm-generic/mman.h definitions are used by a few architectures that also define arch-specific PROT flags with value 0x10 and 0x20. This currently applies to sparc and powerpc for 0x10, while arm64 will soon join with 0x10 and 0x20. To help future maintainers, document the use of this flag in the asm-generic header too. Cc: Arnd Bergmann Signed-off-by: Dave Martin [catalin.marinas@arm.com: reserve 0x20 as well] Signed-off-by: Catalin Marinas --- include/uapi/asm-generic/mman-common.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index c160a5354eb6..f94f65d429be 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -11,6 +11,8 @@ #define PROT_WRITE 0x2 /* page can be written */ #define PROT_EXEC 0x4 /* page can be executed */ #define PROT_SEM 0x8 /* page may be used for atomic ops */ +/* 0x10 reserved for arch-specific use */ +/* 0x20 reserved for arch-specific use */ #define PROT_NONE 0x0 /* page can not be accessed */ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com ([217.140.110.172]:43006 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728128AbfLKSkj (ORCPT ); Wed, 11 Dec 2019 13:40:39 -0500 From: Catalin Marinas Subject: [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use Date: Wed, 11 Dec 2019 18:40:06 +0000 Message-ID: <20191211184027.20130-2-catalin.marinas@arm.com> In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com> References: <20191211184027.20130-1-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-arm-kernel@lists.infradead.org Cc: Will Deacon , Marc Zyngier , Vincenzo Frascino , Szabolcs Nagy , Richard Earnshaw , Kevin Brodsky , Andrey Konovalov , linux-mm@kvack.org, linux-arch@vger.kernel.org, Dave Martin , Arnd Bergmann Message-ID: <20191211184006.M2MJyBTPCozZ_POEwgsBzbbNqddi77X0CrTwQZa3dJA@z> From: Dave Martin The asm-generic/mman.h definitions are used by a few architectures that also define arch-specific PROT flags with value 0x10 and 0x20. This currently applies to sparc and powerpc for 0x10, while arm64 will soon join with 0x10 and 0x20. To help future maintainers, document the use of this flag in the asm-generic header too. Cc: Arnd Bergmann Signed-off-by: Dave Martin [catalin.marinas@arm.com: reserve 0x20 as well] Signed-off-by: Catalin Marinas --- include/uapi/asm-generic/mman-common.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index c160a5354eb6..f94f65d429be 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -11,6 +11,8 @@ #define PROT_WRITE 0x2 /* page can be written */ #define PROT_EXEC 0x4 /* page can be executed */ #define PROT_SEM 0x8 /* page may be used for atomic ops */ +/* 0x10 reserved for arch-specific use */ +/* 0x20 reserved for arch-specific use */ #define PROT_NONE 0x0 /* page can not be accessed */ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */