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From: Mark Brown <broonie@kernel.org>
Date: Mon, 22 Jan 2024 20:41:51 +0000
Subject: [PATCH 1/4] arm64/sve: Remove bitrotted comment about syscall
 behaviour
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Message-Id: <20240122-arm64-sve-sme-doc-v1-1-3d492e45265b@kernel.org>
References: <20240122-arm64-sve-sme-doc-v1-0-3d492e45265b@kernel.org>
In-Reply-To: <20240122-arm64-sve-sme-doc-v1-0-3d492e45265b@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>, 
 Will Deacon <will@kernel.org>, Jonathan Corbet <corbet@lwn.net>
Cc: Dave Martin <dave.martin@arm.com>, linux-arm-kernel@lists.infradead.org, 
 linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, 
 Mark Brown <broonie@kernel.org>, 
 Edmund Grimley-Evans <edmund.grimley-evans@arm.com>

When we documented that we always clear state not shared with FPSIMD we
didn't catch all of the places that mentioned that state might not be
cleared, remove a lingering reference.

Reported-by: Edmund Grimley-Evans <edmund.grimley-evans@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 Documentation/arch/arm64/sve.rst | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/Documentation/arch/arm64/sve.rst b/Documentation/arch/arm64/sve.rst
index 0d9a426e9f85..b45a2da19bf1 100644
--- a/Documentation/arch/arm64/sve.rst
+++ b/Documentation/arch/arm64/sve.rst
@@ -117,11 +117,6 @@ the SVE instruction set architecture.
 * The SVE registers are not used to pass arguments to or receive results from
   any syscall.
 
-* In practice the affected registers/bits will be preserved or will be replaced
-  with zeros on return from a syscall, but userspace should not make
-  assumptions about this.  The kernel behaviour may vary on a case-by-case
-  basis.
-
 * All other SVE state of a thread, including the currently configured vector
   length, the state of the PR_SVE_VL_INHERIT flag, and the deferred vector
   length (if any), is preserved across all syscalls, subject to the specific

-- 
2.30.2