From: Dave Martin <Dave.Martin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
"Yu-cheng Yu" <yu-cheng.yu@intel.com>,
"H.J. Lu" <hjl.tools@gmail.com>, "Arnd Bergmann" <arnd@arndb.de>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Andrew Jones" <drjones@redhat.com>,
"Will Deacon" <will.deacon@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Kristina Martšenko" <kristina.martsenko@arm.com>,
"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
"Sudakshina Das" <sudi.das@arm.com>,
"Paul Elliott" <paul.elliott@arm.com>
Subject: [PATCH 2/8] mm: Reserve asm-generic prot flag 0x10 for arch use
Date: Fri, 24 May 2019 11:25:27 +0100 [thread overview]
Message-ID: <1558693533-13465-3-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1558693533-13465-1-git-send-email-Dave.Martin@arm.com>
The asm-generic mman definitions are used by a few architectures
that also define an arch-specific PROT flag with value 0x10. This
currently applies to sparc and powerpc, and arm64 will soon join
in.
To help future maintainers, document the use of this flag in the
asm-generic header too.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
---
include/uapi/asm-generic/mman-common.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h
index abd238d..ad3c6e5 100644
--- a/include/uapi/asm-generic/mman-common.h
+++ b/include/uapi/asm-generic/mman-common.h
@@ -11,6 +11,7 @@
#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 */
#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 */
--
2.1.4
next prev parent reply other threads:[~2019-05-24 10:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-24 10:25 [PATCH 0/8] arm64: ARMv8.5-A: Branch Target Identification support Dave Martin
2019-05-24 10:25 ` [PATCH 1/8] binfmt_elf: Extract .note.gnu.property from an ELF file Dave Martin
2019-05-24 10:25 ` Dave Martin [this message]
2019-05-24 10:25 ` [PATCH 3/8] arm64: docs: cpu-feature-registers: Document ID_AA64PFR1_EL1 Dave Martin
2019-05-24 10:25 ` [PATCH 4/8] arm64: Basic Branch Target Identification support Dave Martin
2019-05-24 13:02 ` Mark Rutland
2019-05-24 14:53 ` Dave Martin
2019-05-24 15:38 ` Mark Rutland
2019-05-24 16:12 ` Dave Martin
2019-05-24 17:19 ` Mark Rutland
2019-05-28 10:52 ` Dave P Martin
2019-06-06 17:11 ` Catalin Marinas
2019-06-06 17:23 ` Dave Martin
2019-06-06 17:34 ` Yu-cheng Yu
2019-06-06 17:56 ` Dave Martin
2019-05-24 10:25 ` [PATCH 5/8] elf: Parse program properties before destroying the old process Dave Martin
2019-05-24 10:25 ` [PATCH 6/8] elf: Allow arch to tweak initial mmap prot flags Dave Martin
2019-05-24 10:25 ` [PATCH 7/8] arm64: elf: Enable BTI at exec based on ELF program properties Dave Martin
2019-05-24 10:25 ` [PATCH 8/8] arm64: BTI: Decode BYTPE bits when printing PSTATE Dave Martin
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