From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: "Alexander Viro" <viro@zeniv.linux.org.uk>,
"Paul Elliott" <paul.elliott@arm.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Yu-cheng Yu" <yu-cheng.yu@intel.com>,
"Amit Kachhap" <amit.kachhap@arm.com>,
"Vincenzo Frascino" <vincenzo.frascino@arm.com>,
"Marc Zyngier" <maz@kernel.org>,
"Eugene Syromiatnikov" <esyr@redhat.com>,
"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
"H . J . Lu " <hjl.tools@gmail.com>,
"Andrew Jones" <drjones@redhat.com>,
"Kees Cook" <keescook@chromium.org>,
"Arnd Bergmann" <arnd@arndb.de>, "Jann Horn" <jannh@google.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Kristina Martšenko" <kristina.martsenko@arm.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Florian Weimer" <fweimer@redhat.com>,
"Sudakshina Das" <sudi.das@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-fsdevel@vger.kernel.org,
"Dave Martin" <Dave.Martin@arm.com>,
"Mark Brown" <broonie@kernel.org>
Subject: [PATCH v5 03/12] mm: Reserve asm-generic prot flag 0x10 for arch use
Date: Wed, 22 Jan 2020 21:21:35 +0000 [thread overview]
Message-ID: <20200122212144.6409-4-broonie@kernel.org> (raw)
In-Reply-To: <20200122212144.6409-1-broonie@kernel.org>
From: Dave Martin <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>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
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 c160a5354eb6..81442d2aaecb 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 */
--
2.20.1
next prev parent reply other threads:[~2020-01-22 21:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 21:21 [PATCH v5 00/12] arm64: ARMv8.5-A: Branch Target Identification support Mark Brown
2020-01-22 21:21 ` [PATCH v5 01/12] ELF: UAPI and Kconfig additions for ELF program properties Mark Brown
2020-01-22 21:21 ` [PATCH v5 02/12] ELF: Add ELF program property parsing support Mark Brown
2020-01-22 21:21 ` Mark Brown [this message]
2020-01-22 21:21 ` [PATCH v5 04/12] arm64: Basic Branch Target Identification support Mark Brown
2020-01-22 21:21 ` [PATCH v5 05/12] elf: Allow arch to tweak initial mmap prot flags Mark Brown
2020-01-22 21:21 ` [PATCH v5 06/12] arm64: elf: Enable BTI at exec based on ELF program properties Mark Brown
2020-01-24 19:12 ` kbuild test robot
2020-01-22 21:21 ` [PATCH v5 07/12] arm64: BTI: Decode BYTPE bits when printing PSTATE Mark Brown
2020-01-22 21:21 ` [PATCH v5 08/12] arm64: unify native/compat instruction skipping Mark Brown
2020-01-22 21:21 ` [PATCH v5 09/12] arm64: traps: Shuffle code to eliminate forward declarations Mark Brown
2020-01-24 23:00 ` kbuild test robot
2020-01-22 21:21 ` [PATCH v5 10/12] arm64: BTI: Reset BTYPE when skipping emulated instructions Mark Brown
2020-01-22 21:21 ` [PATCH v5 11/12] KVM: " Mark Brown
2020-01-22 21:21 ` [PATCH v5 12/12] arm64: mm: Display guarded pages in ptdump Mark Brown
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