From 8171ff3d24c7f93149d990343146d4894744ff84 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 29 Jul 2022 15:36:58 +0800 Subject: [PATCH] arm64/sve: Minor clarification of ABI documentation mainline inclusion from mainline-v5.17-rc1 commit aed34d9e52b80b4e7485119272c77c5553a21499 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5ITJT CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=aed34d9e52b80b4e7485119272c77c5553a21499 ------------------------------------------------- As suggested by Luis for the SME version of this explicitly say that the vector length should be extracted from the return value of a set vector length prctl() with a bitwise and rather than just any old and. Suggested-by: Luis Machado Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20211210184133.320748-4-broonie@kernel.org Signed-off-by: Catalin Marinas Signed-off-by: Wang ShaoBo --- Documentation/arm64/sve.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/arm64/sve.rst b/Documentation/arm64/sve.rst index 03137154299e..9d9a4de5bc34 100644 --- a/Documentation/arm64/sve.rst +++ b/Documentation/arm64/sve.rst @@ -255,7 +255,7 @@ prctl(PR_SVE_GET_VL) vector length change (which would only normally be the case between a fork() or vfork() and the corresponding execve() in typical use). - To extract the vector length from the result, and it with + To extract the vector length from the result, bitwise and it with PR_SVE_VL_LEN_MASK. Return value: a nonnegative value on success, or a negative value on error: -- GitLab